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Author SHA1 Message Date
Linus Torvalds
d9104cec3e bpf-next-6.17 
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Merge tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

 - Remove usermode driver (UMD) framework (Thomas Weißschuh)

 - Introduce Strongly Connected Component (SCC) in the verifier to
   detect loops and refine register liveness (Eduard Zingerman)

 - Allow 'void *' cast using bpf_rdonly_cast() and corresponding
   '__arg_untrusted' for global function parameters (Eduard Zingerman)

 - Improve precision for BPF_ADD and BPF_SUB operations in the verifier
   (Harishankar Vishwanathan)

 - Teach the verifier that constant pointer to a map cannot be NULL
   (Ihor Solodrai)

 - Introduce BPF streams for error reporting of various conditions
   detected by BPF runtime (Kumar Kartikeya Dwivedi)

 - Teach the verifier to insert runtime speculation barrier (lfence on
   x86) to mitigate speculative execution instead of rejecting the
   programs (Luis Gerhorst)

 - Various improvements for 'veristat' (Mykyta Yatsenko)

 - For CONFIG_DEBUG_KERNEL config warn on internal verifier errors to
   improve bug detection by syzbot (Paul Chaignon)

 - Support BPF private stack on arm64 (Puranjay Mohan)

 - Introduce bpf_cgroup_read_xattr() kfunc to read xattr of cgroup's
   node (Song Liu)

 - Introduce kfuncs for read-only string opreations (Viktor Malik)

 - Implement show_fdinfo() for bpf_links (Tao Chen)

 - Reduce verifier's stack consumption (Yonghong Song)

 - Implement mprog API for cgroup-bpf programs (Yonghong Song)

* tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (192 commits)
  selftests/bpf: Migrate fexit_noreturns case into tracing_failure test suite
  selftests/bpf: Add selftest for attaching tracing programs to functions in deny list
  bpf: Add log for attaching tracing programs to functions in deny list
  bpf: Show precise rejected function when attaching fexit/fmod_ret to __noreturn functions
  bpf: Fix various typos in verifier.c comments
  bpf: Add third round of bounds deduction
  selftests/bpf: Test invariants on JSLT crossing sign
  selftests/bpf: Test cross-sign 64bits range refinement
  selftests/bpf: Update reg_bound range refinement logic
  bpf: Improve bounds when s64 crosses sign boundary
  bpf: Simplify bounds refinement from s32
  selftests/bpf: Enable private stack tests for arm64
  bpf, arm64: JIT support for private stack
  bpf: Move bpf_jit_get_prog_name() to core.c
  bpf, arm64: Fix fp initialization for exception boundary
  umd: Remove usermode driver framework
  bpf/preload: Don't select USERMODE_DRIVER
  selftests/bpf: Fix test dynptr/test_dynptr_memset_xdp_chunks failure
  selftests/bpf: Fix test dynptr/test_dynptr_copy_xdp failure
  selftests/bpf: Increase xdp data size for arm64 64K page size
  ...
 2025-07-30 09:58:50 -07:00
Linus Torvalds
8be4d31cb8 Networking changes for 6.17. 
Core & protocols
 ----------------
 
  - Wrap datapath globals into net_aligned_data, to avoid false sharing.
 
  - Preserve MSG_ZEROCOPY in forwarding (e.g. out of a container).
 
  - Add SO_INQ and SCM_INQ support to AF_UNIX.
 
  - Add SIOCINQ support to AF_VSOCK.
 
  - Add TCP_MAXSEG sockopt to MPTCP.
 
  - Add IPv6 force_forwarding sysctl to enable forwarding per interface.
 
  - Make TCP validation of whether packet fully fits in the receive
    window and the rcv_buf more strict. With increased use of HW
    aggregation a single "packet" can be multiple 100s of kB.
 
  - Add MSG_MORE flag to optimize large TCP transmissions via sockmap,
    improves latency up to 33% for sockmap users.
 
  - Convert TCP send queue handling from tasklet to BH workque.
 
  - Improve BPF iteration over TCP sockets to see each socket exactly once.
 
  - Remove obsolete and unused TCP RFC3517/RFC6675 loss recovery code.
 
  - Support enabling kernel threads for NAPI processing on per-NAPI
    instance basis rather than a whole device. Fully stop the kernel NAPI
    thread when threaded NAPI gets disabled. Previously thread would stick
    around until ifdown due to tricky synchronization.
 
  - Allow multicast routing to take effect on locally-generated packets.
 
  - Add output interface argument for End.X in segment routing.
 
  - MCTP: add support for gateway routing, improve bind() handling.
 
  - Don't require rtnl_lock when fetching an IPv6 neighbor over Netlink.
 
  - Add a new neighbor flag ("extern_valid"), which cedes refresh
    responsibilities to userspace. This is needed for EVPN multi-homing
    where a neighbor entry for a multi-homed host needs to be synced
    across all the VTEPs among which the host is multi-homed.
 
  - Support NUD_PERMANENT for proxy neighbor entries.
 
  - Add a new queuing discipline for IETF RFC9332 DualQ Coupled AQM.
 
  - Add sequence numbers to netconsole messages. Unregister netconsole's
    console when all net targets are removed. Code refactoring.
    Add a number of selftests.
 
  - Align IPSec inbound SA lookup to RFC 4301. Only SPI and protocol
    should be used for an inbound SA lookup.
 
  - Support inspecting ref_tracker state via DebugFS.
 
  - Don't force bonding advertisement frames tx to ~333 ms boundaries.
    Add broadcast_neighbor option to send ARP/ND on all bonded links.
 
  - Allow providing upcall pid for the 'execute' command in openvswitch.
 
  - Remove DCCP support from Netfilter's conntrack.
 
  - Disallow multiple packet duplications in the queuing layer.
 
  - Prevent use of deprecated iptables code on PREEMPT_RT.
 
 Driver API
 ----------
 
  - Support RSS and hashing configuration over ethtool Netlink.
 
  - Add dedicated ethtool callbacks for getting and setting hashing fields.
 
  - Add support for power budget evaluation strategy in PSE /
    Power-over-Ethernet. Generate Netlink events for overcurrent etc.
 
  - Support DPLL phase offset monitoring across all device inputs.
    Support providing clock reference and SYNC over separate DPLL
    inputs.
 
  - Support traffic classes in devlink rate API for bandwidth management.
 
  - Remove rtnl_lock dependency from UDP tunnel port configuration.
 
 Device drivers
 --------------
 
  - Add a new Broadcom driver for 800G Ethernet (bnge).
 
  - Add a standalone driver for Microchip ZL3073x DPLL.
 
  - Remove IBM's NETIUCV device driver.
 
  - Ethernet high-speed NICs:
    - Broadcom (bnxt):
     - support zero-copy Tx of DMABUF memory
     - take page size into account for page pool recycling rings
    - Intel (100G, ice, idpf):
      - idpf: XDP and AF_XDP support preparations
      - idpf: add flow steering
      - add link_down_events statistic
      - clean up the TSPLL code
      - preparations for live VM migration
    - nVidia/Mellanox:
     - support zero-copy Rx/Tx interfaces (DMABUF and io_uring)
     - optimize context memory usage for matchers
     - expose serial numbers in devlink info
     - support PCIe congestion metrics
    - Meta (fbnic):
      - add 25G, 50G, and 100G link modes to phylink
      - support dumping FW logs
    - Marvell/Cavium:
      - support for CN20K generation of the Octeon chips
    - Amazon:
      - add HW clock (without timestamping, just hypervisor time access)
 
  - Ethernet virtual:
    - VirtIO net:
      - support segmentation of UDP-tunnel-encapsulated packets
    - Google (gve):
      - support packet timestamping and clock synchronization
    - Microsoft vNIC:
      - add handler for device-originated servicing events
      - allow dynamic MSI-X vector allocation
      - support Tx bandwidth clamping
 
  - Ethernet NICs consumer, and embedded:
    - AMD:
      - amd-xgbe: hardware timestamping and PTP clock support
    - Broadcom integrated MACs (bcmgenet, bcmasp):
      - use napi_complete_done() return value to support NAPI polling
      - add support for re-starting auto-negotiation
    - Broadcom switches (b53):
      - support BCM5325 switches
      - add bcm63xx EPHY power control
    - Synopsys (stmmac):
      - lots of code refactoring and cleanups
    - TI:
      - icssg-prueth: read firmware-names from device tree
      - icssg: PRP offload support
    - Microchip:
      - lan78xx: convert to PHYLINK for improved PHY and MAC management
      - ksz: add KSZ8463 switch support
    - Intel:
      - support similar queue priority scheme in multi-queue and
        time-sensitive networking (taprio)
      - support packet pre-emption in both
    - RealTek (r8169):
      - enable EEE at 5Gbps on RTL8126
    - Airoha:
      - add PPPoE offload support
      - MDIO bus controller for Airoha AN7583
 
  - Ethernet PHYs:
    - support for the IPQ5018 internal GE PHY
    - micrel KSZ9477 switch-integrated PHYs:
      - add MDI/MDI-X control support
      - add RX error counters
      - add cable test support
      - add Signal Quality Indicator (SQI) reporting
    - dp83tg720: improve reset handling and reduce link recovery time
    - support bcm54811 (and its MII-Lite interface type)
    - air_en8811h: support resume/suspend
    - support PHY counters for QCA807x and QCA808x
    - support WoL for QCA807x
 
  - CAN drivers:
    - rcar_canfd: support for Transceiver Delay Compensation
    - kvaser: report FW versions via devlink dev info
 
  - WiFi:
    - extended regulatory info support (6 GHz)
    - add statistics and beacon monitor for Multi-Link Operation (MLO)
    - support S1G aggregation, improve S1G support
    - add Radio Measurement action fields
    - support per-radio RTS threshold
    - some work around how FIPS affects wifi, which was wrong (RC4 is used
      by TKIP, not only WEP)
    - improvements for unsolicited probe response handling
 
  - WiFi drivers:
    - RealTek (rtw88):
      - IBSS mode for SDIO devices
    - RealTek (rtw89):
      - BT coexistence for MLO/WiFi7
      - concurrent station + P2P support
      - support for USB devices RTL8851BU/RTL8852BU
    - Intel (iwlwifi):
      - use embedded PNVM in (to be released) FW images to fix
        compatibility issues
      - many cleanups (unused FW APIs, PCIe code, WoWLAN)
      - some FIPS interoperability
    - MediaTek (mt76):
      - firmware recovery improvements
      - more MLO work
    - Qualcomm/Atheros (ath12k):
      - fix scan on multi-radio devices
      - more EHT/Wi-Fi 7 features
      - encapsulation/decapsulation offload
    - Broadcom (brcm80211):
      - support SDIO 43751 device
 
  - Bluetooth:
    - hci_event: add support for handling LE BIG Sync Lost event
    - ISO: add socket option to report packet seqnum via CMSG
    - ISO: support SCM_TIMESTAMPING for ISO TS
 
  - Bluetooth drivers:
    - intel_pcie: support Function Level Reset
    - nxpuart: add support for 4M baudrate
    - nxpuart: implement powerup sequence, reset, FW dump, and FW loading
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core & protocols:

   - Wrap datapath globals into net_aligned_data, to avoid false sharing

   - Preserve MSG_ZEROCOPY in forwarding (e.g. out of a container)

   - Add SO_INQ and SCM_INQ support to AF_UNIX

   - Add SIOCINQ support to AF_VSOCK

   - Add TCP_MAXSEG sockopt to MPTCP

   - Add IPv6 force_forwarding sysctl to enable forwarding per interface

   - Make TCP validation of whether packet fully fits in the receive
     window and the rcv_buf more strict. With increased use of HW
     aggregation a single "packet" can be multiple 100s of kB

   - Add MSG_MORE flag to optimize large TCP transmissions via sockmap,
     improves latency up to 33% for sockmap users

   - Convert TCP send queue handling from tasklet to BH workque

   - Improve BPF iteration over TCP sockets to see each socket exactly
     once

   - Remove obsolete and unused TCP RFC3517/RFC6675 loss recovery code

   - Support enabling kernel threads for NAPI processing on per-NAPI
     instance basis rather than a whole device. Fully stop the kernel
     NAPI thread when threaded NAPI gets disabled. Previously thread
     would stick around until ifdown due to tricky synchronization

   - Allow multicast routing to take effect on locally-generated packets

   - Add output interface argument for End.X in segment routing

   - MCTP: add support for gateway routing, improve bind() handling

   - Don't require rtnl_lock when fetching an IPv6 neighbor over Netlink

   - Add a new neighbor flag ("extern_valid"), which cedes refresh
     responsibilities to userspace. This is needed for EVPN multi-homing
     where a neighbor entry for a multi-homed host needs to be synced
     across all the VTEPs among which the host is multi-homed

   - Support NUD_PERMANENT for proxy neighbor entries

   - Add a new queuing discipline for IETF RFC9332 DualQ Coupled AQM

   - Add sequence numbers to netconsole messages. Unregister
     netconsole's console when all net targets are removed. Code
     refactoring. Add a number of selftests

   - Align IPSec inbound SA lookup to RFC 4301. Only SPI and protocol
     should be used for an inbound SA lookup

   - Support inspecting ref_tracker state via DebugFS

   - Don't force bonding advertisement frames tx to ~333 ms boundaries.
     Add broadcast_neighbor option to send ARP/ND on all bonded links

   - Allow providing upcall pid for the 'execute' command in openvswitch

   - Remove DCCP support from Netfilter's conntrack

   - Disallow multiple packet duplications in the queuing layer

   - Prevent use of deprecated iptables code on PREEMPT_RT

  Driver API:

   - Support RSS and hashing configuration over ethtool Netlink

   - Add dedicated ethtool callbacks for getting and setting hashing
     fields

   - Add support for power budget evaluation strategy in PSE /
     Power-over-Ethernet. Generate Netlink events for overcurrent etc

   - Support DPLL phase offset monitoring across all device inputs.
     Support providing clock reference and SYNC over separate DPLL
     inputs

   - Support traffic classes in devlink rate API for bandwidth
     management

   - Remove rtnl_lock dependency from UDP tunnel port configuration

  Device drivers:

   - Add a new Broadcom driver for 800G Ethernet (bnge)

   - Add a standalone driver for Microchip ZL3073x DPLL

   - Remove IBM's NETIUCV device driver

   - Ethernet high-speed NICs:
      - Broadcom (bnxt):
         - support zero-copy Tx of DMABUF memory
         - take page size into account for page pool recycling rings
      - Intel (100G, ice, idpf):
         - idpf: XDP and AF_XDP support preparations
         - idpf: add flow steering
         - add link_down_events statistic
         - clean up the TSPLL code
         - preparations for live VM migration
      - nVidia/Mellanox:
         - support zero-copy Rx/Tx interfaces (DMABUF and io_uring)
         - optimize context memory usage for matchers
         - expose serial numbers in devlink info
         - support PCIe congestion metrics
      - Meta (fbnic):
         - add 25G, 50G, and 100G link modes to phylink
         - support dumping FW logs
      - Marvell/Cavium:
         - support for CN20K generation of the Octeon chips
      - Amazon:
         - add HW clock (without timestamping, just hypervisor time access)

   - Ethernet virtual:
      - VirtIO net:
         - support segmentation of UDP-tunnel-encapsulated packets
      - Google (gve):
         - support packet timestamping and clock synchronization
      - Microsoft vNIC:
         - add handler for device-originated servicing events
         - allow dynamic MSI-X vector allocation
         - support Tx bandwidth clamping

   - Ethernet NICs consumer, and embedded:
      - AMD:
         - amd-xgbe: hardware timestamping and PTP clock support
      - Broadcom integrated MACs (bcmgenet, bcmasp):
         - use napi_complete_done() return value to support NAPI polling
         - add support for re-starting auto-negotiation
      - Broadcom switches (b53):
         - support BCM5325 switches
         - add bcm63xx EPHY power control
      - Synopsys (stmmac):
         - lots of code refactoring and cleanups
      - TI:
         - icssg-prueth: read firmware-names from device tree
         - icssg: PRP offload support
      - Microchip:
         - lan78xx: convert to PHYLINK for improved PHY and MAC management
         - ksz: add KSZ8463 switch support
      - Intel:
         - support similar queue priority scheme in multi-queue and
           time-sensitive networking (taprio)
         - support packet pre-emption in both
      - RealTek (r8169):
         - enable EEE at 5Gbps on RTL8126
      - Airoha:
         - add PPPoE offload support
         - MDIO bus controller for Airoha AN7583

   - Ethernet PHYs:
      - support for the IPQ5018 internal GE PHY
      - micrel KSZ9477 switch-integrated PHYs:
         - add MDI/MDI-X control support
         - add RX error counters
         - add cable test support
         - add Signal Quality Indicator (SQI) reporting
      - dp83tg720: improve reset handling and reduce link recovery time
      - support bcm54811 (and its MII-Lite interface type)
      - air_en8811h: support resume/suspend
      - support PHY counters for QCA807x and QCA808x
      - support WoL for QCA807x

   - CAN drivers:
      - rcar_canfd: support for Transceiver Delay Compensation
      - kvaser: report FW versions via devlink dev info

   - WiFi:
      - extended regulatory info support (6 GHz)
      - add statistics and beacon monitor for Multi-Link Operation (MLO)
      - support S1G aggregation, improve S1G support
      - add Radio Measurement action fields
      - support per-radio RTS threshold
      - some work around how FIPS affects wifi, which was wrong (RC4 is
        used by TKIP, not only WEP)
      - improvements for unsolicited probe response handling

   - WiFi drivers:
      - RealTek (rtw88):
         - IBSS mode for SDIO devices
      - RealTek (rtw89):
         - BT coexistence for MLO/WiFi7
         - concurrent station + P2P support
         - support for USB devices RTL8851BU/RTL8852BU
      - Intel (iwlwifi):
         - use embedded PNVM in (to be released) FW images to fix
           compatibility issues
         - many cleanups (unused FW APIs, PCIe code, WoWLAN)
         - some FIPS interoperability
      - MediaTek (mt76):
         - firmware recovery improvements
         - more MLO work
      - Qualcomm/Atheros (ath12k):
         - fix scan on multi-radio devices
         - more EHT/Wi-Fi 7 features
         - encapsulation/decapsulation offload
      - Broadcom (brcm80211):
         - support SDIO 43751 device

   - Bluetooth:
      - hci_event: add support for handling LE BIG Sync Lost event
      - ISO: add socket option to report packet seqnum via CMSG
      - ISO: support SCM_TIMESTAMPING for ISO TS

   - Bluetooth drivers:
      - intel_pcie: support Function Level Reset
      - nxpuart: add support for 4M baudrate
      - nxpuart: implement powerup sequence, reset, FW dump, and FW loading"

* tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1742 commits)
  dpll: zl3073x: Fix build failure
  selftests: bpf: fix legacy netfilter options
  ipv6: annotate data-races around rt->fib6_nsiblings
  ipv6: fix possible infinite loop in fib6_info_uses_dev()
  ipv6: prevent infinite loop in rt6_nlmsg_size()
  ipv6: add a retry logic in net6_rt_notify()
  vrf: Drop existing dst reference in vrf_ip6_input_dst
  net/sched: taprio: align entry index attr validation with mqprio
  net: fsl_pq_mdio: use dev_err_probe
  selftests: rtnetlink.sh: remove esp4_offload after test
  vsock: remove unnecessary null check in vsock_getname()
  igb: xsk: solve negative overflow of nb_pkts in zerocopy mode
  stmmac: xsk: fix negative overflow of budget in zerocopy mode
  dt-bindings: ieee802154: Convert at86rf230.txt yaml format
  net: dsa: microchip: Disable PTP function of KSZ8463
  net: dsa: microchip: Setup fiber ports for KSZ8463
  net: dsa: microchip: Write switch MAC address differently for KSZ8463
  net: dsa: microchip: Use different registers for KSZ8463
  net: dsa: microchip: Add KSZ8463 switch support to KSZ DSA driver
  dt-bindings: net: dsa: microchip: Add KSZ8463 switch support
  ...
 2025-07-30 08:58:55 -07:00
Linus Torvalds
c3018a2c6a for-6.17/io_uring-20250728 
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Merge tag 'for-6.17/io_uring-20250728' of git://git.kernel.dk/linux

Pull io_uring updates from Jens Axboe:

 - Optimization to avoid reference counts on non-cloned registered
   buffers. This is how these buffers were handled prior to having
   cloning support, and we can still use that approach as long as the
   buffers haven't been cloned to another ring.

 - Cleanup and improvement for uring_cmd, where btrfs was the only user
   of storing allocated data for the lifetime of the uring_cmd. Clean
   that up so we can get rid of the need to do that.

 - Avoid unnecessary memory copies in uring_cmd usage. This is
   particularly important as a lot of uring_cmd usage necessitates the
   use of 128b SQEs.

 - A few updates for recv multishot, where it's now possible to add
   fairness limits for limiting how much is transferred for each retry
   loop. Additionally, recv multishot now supports an overall cap as
   well, where once reached the multishot recv will terminate. The
   latter is useful for buffer management and juggling many recv streams
   at the same time.

 - Add support for returning the TX timestamps via a new socket command.
   This feature can work in either singleshot or multishot mode, where
   the latter triggers a completion whenever new timestamps are
   available. This is an alternative to using the existing error queue.

 - Add support for an io_uring "mock" file, which is the start of being
   able to do 100% targeted testing in terms of exercising io_uring
   request handling. The idea is to have a file type that can be
   anything the tester would like, and behave exactly how you want it to
   behave in terms of hitting the code paths you want.

 - Improve zcrx by using sgtables to de-duplicate and improve dma
   address handling.

 - Prep work for supporting larger pages for zcrx.

 - Various little improvements and fixes.

* tag 'for-6.17/io_uring-20250728' of git://git.kernel.dk/linux: (42 commits)
  io_uring/zcrx: fix leaking pages on sg init fail
  io_uring/zcrx: don't leak pages on account failure
  io_uring/zcrx: fix null ifq on area destruction
  io_uring: fix breakage in EXPERT menu
  io_uring/cmd: remove struct io_uring_cmd_data
  btrfs/ioctl: store btrfs_uring_encoded_data in io_btrfs_cmd
  io_uring/cmd: introduce IORING_URING_CMD_REISSUE flag
  io_uring/zcrx: account area memory
  io_uring: export io_[un]account_mem
  io_uring/net: Support multishot receive len cap
  io_uring: deduplicate wakeup handling
  io_uring/net: cast min_not_zero() type
  io_uring/poll: cleanup apoll freeing
  io_uring/net: allow multishot receive per-invocation cap
  io_uring/net: move io_sr_msg->retry_flags to io_sr_msg->flags
  io_uring/net: use passed in 'len' in io_recv_buf_select()
  io_uring/zcrx: prepare fallback for larger pages
  io_uring/zcrx: assert area type in io_zcrx_iov_page
  io_uring/zcrx: allocate sgtable for umem areas
  io_uring/zcrx: introduce io_populate_area_dma
  ...
 2025-07-28 16:30:12 -07:00
Linus Torvalds
672dcda246 vfs-6.17-rc1.pidfs 
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Merge tag 'vfs-6.17-rc1.pidfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull pidfs updates from Christian Brauner:

 - persistent info

   Persist exit and coredump information independent of whether anyone
   currently holds a pidfd for the struct pid.

   The current scheme allocated pidfs dentries on-demand repeatedly.
   This scheme is reaching it's limits as it makes it impossible to pin
   information that needs to be available after the task has exited or
   coredumped and that should not be lost simply because the pidfd got
   closed temporarily. The next opener should still see the stashed
   information.

   This is also a prerequisite for supporting extended attributes on
   pidfds to allow attaching meta information to them.

   If someone opens a pidfd for a struct pid a pidfs dentry is allocated
   and stashed in pid->stashed. Once the last pidfd for the struct pid
   is closed the pidfs dentry is released and removed from pid->stashed.

   So if 10 callers create a pidfs dentry for the same struct pid
   sequentially, i.e., each closing the pidfd before the other creates a
   new one then a new pidfs dentry is allocated every time.

   Because multiple tasks acquiring and releasing a pidfd for the same
   struct pid can race with each another a task may still find a valid
   pidfs entry from the previous task in pid->stashed and reuse it. Or
   it might find a dead dentry in there and fail to reuse it and so
   stashes a new pidfs dentry. Multiple tasks may race to stash a new
   pidfs dentry but only one will succeed, the other ones will put their
   dentry.

   The current scheme aims to ensure that a pidfs dentry for a struct
   pid can only be created if the task is still alive or if a pidfs
   dentry already existed before the task was reaped and so exit
   information has been was stashed in the pidfs inode.

   That's great except that it's buggy. If a pidfs dentry is stashed in
   pid->stashed after pidfs_exit() but before __unhash_process() is
   called we will return a pidfd for a reaped task without exit
   information being available.

   The pidfds_pid_valid() check does not guard against this race as it
   doens't sync at all with pidfs_exit(). The pid_has_task() check might
   be successful simply because we're before __unhash_process() but
   after pidfs_exit().

   Introduce a new scheme where the lifetime of information associated
   with a pidfs entry (coredump and exit information) isn't bound to the
   lifetime of the pidfs inode but the struct pid itself.

   The first time a pidfs dentry is allocated for a struct pid a struct
   pidfs_attr will be allocated which will be used to store exit and
   coredump information.

   If all pidfs for the pidfs dentry are closed the dentry and inode can
   be cleaned up but the struct pidfs_attr will stick until the struct
   pid itself is freed. This will ensure minimal memory usage while
   persisting relevant information.

   The new scheme has various advantages. First, it allows to close the
   race where we end up handing out a pidfd for a reaped task for which
   no exit information is available. Second, it minimizes memory usage.
   Third, it allows to remove complex lifetime tracking via dentries
   when registering a struct pid with pidfs. There's no need to get or
   put a reference. Instead, the lifetime of exit and coredump
   information associated with a struct pid is bound to the lifetime of
   struct pid itself.

 - extended attributes

   Now that we have a way to persist information for pidfs dentries we
   can start supporting extended attributes on pidfds. This will allow
   userspace to attach meta information to tasks.

   One natural extension would be to introduce a custom pidfs.* extended
   attribute space and allow for the inheritance of extended attributes
   across fork() and exec().

   The first simple scheme will allow privileged userspace to set
   trusted extended attributes on pidfs inodes.

 - Allow autonomous pidfs file handles

   Various filesystems such as pidfs and drm support opening file
   handles without having to require a file descriptor to identify the
   filesystem. The filesystem are global single instances and can be
   trivially identified solely on the information encoded in the file
   handle.

   This makes it possible to not have to keep or acquire a sentinal file
   descriptor just to pass it to open_by_handle_at() to identify the
   filesystem. That's especially useful when such sentinel file
   descriptor cannot or should not be acquired.

   For pidfs this means a file handle can function as full replacement
   for storing a pid in a file. Instead a file handle can be stored and
   reopened purely based on the file handle.

   Such autonomous file handles can be opened with or without specifying
   a a file descriptor. If no proper file descriptor is used the
   FD_PIDFS_ROOT sentinel must be passed. This allows us to define
   further special negative fd sentinels in the future.

   Userspace can trivially test for support by trying to open the file
   handle with an invalid file descriptor.

 - Allow pidfds for reaped tasks with SCM_PIDFD messages

   This is a logical continuation of the earlier work to create pidfds
   for reaped tasks through the SO_PEERPIDFD socket option merged in
   923ea4d448 ("Merge patch series "net, pidfs: enable handing out
   pidfds for reaped sk->sk_peer_pid"").

 - Two minor fixes:

    * Fold fs_struct->{lock,seq} into a seqlock

    * Don't bother with path_{get,put}() in unix_open_file()

* tag 'vfs-6.17-rc1.pidfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (37 commits)
  don't bother with path_get()/path_put() in unix_open_file()
  fold fs_struct->{lock,seq} into a seqlock
  selftests: net: extend SCM_PIDFD test to cover stale pidfds
  af_unix: enable handing out pidfds for reaped tasks in SCM_PIDFD
  af_unix: stash pidfs dentry when needed
  af_unix/scm: fix whitespace errors
  af_unix: introduce and use scm_replace_pid() helper
  af_unix: introduce unix_skb_to_scm helper
  af_unix: rework unix_maybe_add_creds() to allow sleep
  selftests/pidfd: decode pidfd file handles withou having to specify an fd
  fhandle, pidfs: support open_by_handle_at() purely based on file handle
  uapi/fcntl: add FD_PIDFS_ROOT
  uapi/fcntl: add FD_INVALID
  fcntl/pidfd: redefine PIDFD_SELF_THREAD_GROUP
  uapi/fcntl: mark range as reserved
  fhandle: reflow get_path_anchor()
  pidfs: add pidfs_root_path() helper
  fhandle: rename to get_path_anchor()
  fhandle: hoist copy_from_user() above get_path_from_fd()
  fhandle: raise FILEID_IS_DIR in handle_type
  ...
 2025-07-28 14:10:15 -07:00
Jakub Kicinski
c6dc26df6b netfilter pull request 25-07-25 
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Merge tag 'nf-next-25-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following series contains Netfilter/IPVS updates for net-next:

1) Display netns inode in conntrack table full log, from lvxiafei.

2) Autoload nf_log_syslog in case no logging backend is available,
   from Lance Yang.

3) Three patches to remove unused functions in x_tables, nf_tables and
   conntrack. From Yue Haibing.

4) Exclude LEGACY TABLES on PREEMPT_RT: Add NETFILTER_XTABLES_LEGACY
   to exclude xtables legacy infrastructure.

5) Restore selftests by toggling NETFILTER_XTABLES_LEGACY where needed.
   From Florian Westphal.

6) Use CONFIG_INET_SCTP_DIAG in tools/testing/selftests/net/netfilter/config,
   from Sebastian Andrzej Siewior.

7) Use timer_delete in comment in IPVS codebase, from WangYuli.

8) Dump flowtable information in nfnetlink_hook, this includes an initial
   patch to consolidate common code in helper function, from Phil Sutter.

9) Remove unused arguments in nft_pipapo set backend, from Florian Westphal.

10) Return nft_set_ext instead of boolean in set lookup function,
    from Florian Westphal.

11) Remove indirection in dynamic set infrastructure, also from Florian.

12) Consolidate pipapo_get/lookup, from Florian.

13) Use kvmalloc in nft_pipapop, from Florian Westphal.

14) syzbot reports slab-out-of-bounds in xt_nfacct log message,
    fix from Florian Westphal.

15) Ignored tainted kernels in selftest nft_interface_stress.sh,
    from Phil Sutter.

16) Fix IPVS selftest by disabling rp_filter with ipip tunnel device,
    from Yi Chen.

* tag 'nf-next-25-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next:
  selftests: netfilter: ipvs.sh: Explicity disable rp_filter on interface tunl0
  selftests: netfilter: Ignore tainted kernels in interface stress test
  netfilter: xt_nfacct: don't assume acct name is null-terminated
  netfilter: nft_set_pipapo: prefer kvmalloc for scratch maps
  netfilter: nft_set_pipapo: merge pipapo_get/lookup
  netfilter: nft_set: remove indirection from update API call
  netfilter: nft_set: remove one argument from lookup and update functions
  netfilter: nft_set_pipapo: remove unused arguments
  netfilter: nfnetlink_hook: Dump flowtable info
  netfilter: nfnetlink: New NFNLA_HOOK_INFO_DESC helper
  ipvs: Rename del_timer in comment in ip_vs_conn_expire_now()
  selftests: netfilter: Enable CONFIG_INET_SCTP_DIAG
  selftests: net: Enable legacy netfilter legacy options.
  netfilter: Exclude LEGACY TABLES on PREEMPT_RT.
  netfilter: conntrack: Remove unused net in nf_conntrack_double_lock()
  netfilter: nf_tables: Remove unused nft_reduce_is_readonly()
  netfilter: x_tables: Remove unused functions xt_{in|out}name()
  netfilter: load nf_log_syslog on enabling nf_conntrack_log_invalid
  netfilter: conntrack: table full detailed log
====================

Link: https://patch.msgid.link/20250725170340.21327-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-25 16:37:55 -07:00
Kees Cook
511d10b4c2 sctp: Replace sockaddr with sockaddr_inet in sctp_addr union 
As part of the removal of the variably-sized sockaddr for kernel
internals, replace struct sockaddr with sockaddr_inet in the sctp_addr
union.

No binary changes; the union size remains unchanged due to sockaddr_inet
matching the size of sockaddr_in6.

Signed-off-by: Kees Cook <kees@kernel.org>
Link: https://patch.msgid.link/20250722171836.1078436-3-kees@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-25 15:29:58 -07:00
Florian Westphal
531e613121 netfilter: nft_set: remove indirection from update API call 
This stems from a time when sets and nft_dynset resided in different kernel
modules.  We can replace this with a direct call.

We could even remove both ->update and ->delete, given its only
supported by rhashtable, but on the off-chance we'll see runtime
add/delete for other types or a new set type keep that as-is for now.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 2025-07-25 18:40:23 +02:00
Florian Westphal
17a20e09f0 netfilter: nft_set: remove one argument from lookup and update functions 
Return the extension pointer instead of passing it as a function
argument to be filled in by the callee.

As-is, whenever false is returned, the extension pointer is not used.

For all set types, when true is returned, the extension pointer was set
to the matching element.

Only exception: nft_set_bitmap doesn't support extensions.
Return a pointer to a static const empty element extension container.

return false -> return NULL
return true -> return the elements' extension pointer.

This saves one function argument.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 2025-07-25 18:40:16 +02:00
Yue Haibing
bf6788742b netfilter: nf_tables: Remove unused nft_reduce_is_readonly() 
Since commit 9e539c5b6d ("netfilter: nf_tables: disable expression
reduction infra") this is unused.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 2025-07-25 18:37:12 +02:00
Lance Yang
e89a680466 netfilter: load nf_log_syslog on enabling nf_conntrack_log_invalid 
When no logger is registered, nf_conntrack_log_invalid fails to log invalid
packets, leaving users unaware of actual invalid traffic. Improve this by
loading nf_log_syslog, similar to how 'iptables -I FORWARD 1 -m conntrack
--ctstate INVALID -j LOG' triggers it.

Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Zi Li <zi.li@linux.dev>
Signed-off-by: Lance Yang <lance.yang@linux.dev>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 2025-07-25 18:35:41 +02:00
Samiullah Khawaja
71c52411c5 net: Create separate gro_flush_normal function 
Move multiple copies of same code snippet doing `gro_flush` and
`gro_normal_list` into separate helper function.

Signed-off-by: Samiullah Khawaja <skhawaja@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250723013031.2911384-2-skhawaja@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-24 18:34:55 -07:00
Jakub Kicinski
d2002ccb47 bluetooth-next pull request for net-next: 
core:
 
  - hci_sync: fix double free in 'hci_discovery_filter_clear()'
  - hci_event: Mask data status from LE ext adv reports
  - hci_devcd_dump: fix out-of-bounds via dev_coredumpv
  - ISO: add socket option to report packet seqnum via CMSG
  - hci_event: Add support for handling LE BIG Sync Lost event
  - ISO: Support SCM_TIMESTAMPING for ISO TS
  - hci_core: Add PA_LINK to distinguish BIG sync and PA sync connections
  - hci_sock: Reset cookie to zero in hci_sock_free_cookie()
 
 drivers:
 
  - btusb: Add new VID/PID 0489/e14e for MT7925
  - btusb: Add a new VID/PID 2c7c/7009 for MT7925
  - btusb: Add RTL8852BE device 0x13d3:0x3618
  - btusb: Add support for variant of RTL8851BE (USB ID 13d3:3601)
  - btusb: Add USB ID 3625:010b for TP-LINK Archer TX10UB Nano
  - btusb: QCA: Support downloading custom-made firmwares
  - btusb: Add one more ID 0x28de:0x1401 for Qualcomm WCN6855
  - nxp: add support for supply and reset
  - btnxpuart: Add support for 4M baudrate
  - btnxpuart: Correct the Independent Reset handling after FW dump
  - btnxpuart: Add uevents for FW dump and FW download complete
  - btintel: Define a macro for Intel Reset vendor command
  - btintel_pcie: Support Function level reset
  - btintel_pcie: Add support for device 0x4d76
  - btintel_pcie: Make driver wait for alive interrupt
  - btintel_pcie: Fix Alive Context State Handling
  - hci_qca: Enable ISO data packet RX
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Merge tag 'for-net-next-2025-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

Luiz Augusto von Dentz says:

====================
bluetooth-next pull request for net-next:

core:

 - hci_sync: fix double free in 'hci_discovery_filter_clear()'
 - hci_event: Mask data status from LE ext adv reports
 - hci_devcd_dump: fix out-of-bounds via dev_coredumpv
 - ISO: add socket option to report packet seqnum via CMSG
 - hci_event: Add support for handling LE BIG Sync Lost event
 - ISO: Support SCM_TIMESTAMPING for ISO TS
 - hci_core: Add PA_LINK to distinguish BIG sync and PA sync connections
 - hci_sock: Reset cookie to zero in hci_sock_free_cookie()

drivers:

 - btusb: Add new VID/PID 0489/e14e for MT7925
 - btusb: Add a new VID/PID 2c7c/7009 for MT7925
 - btusb: Add RTL8852BE device 0x13d3:0x3618
 - btusb: Add support for variant of RTL8851BE (USB ID 13d3:3601)
 - btusb: Add USB ID 3625:010b for TP-LINK Archer TX10UB Nano
 - btusb: QCA: Support downloading custom-made firmwares
 - btusb: Add one more ID 0x28de:0x1401 for Qualcomm WCN6855
 - nxp: add support for supply and reset
 - btnxpuart: Add support for 4M baudrate
 - btnxpuart: Correct the Independent Reset handling after FW dump
 - btnxpuart: Add uevents for FW dump and FW download complete
 - btintel: Define a macro for Intel Reset vendor command
 - btintel_pcie: Support Function level reset
 - btintel_pcie: Add support for device 0x4d76
 - btintel_pcie: Make driver wait for alive interrupt
 - btintel_pcie: Fix Alive Context State Handling
 - hci_qca: Enable ISO data packet RX

* tag 'for-net-next-2025-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next: (42 commits)
  Bluetooth: Add PA_LINK to distinguish BIG sync and PA sync connections
  Bluetooth: hci_event: Mask data status from LE ext adv reports
  Bluetooth: btintel_pcie: Fix Alive Context State Handling
  Bluetooth: btintel_pcie: Make driver wait for alive interrupt
  Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv
  Bluetooth: hci_sync: fix double free in 'hci_discovery_filter_clear()'
  Bluetooth: btusb: Add one more ID 0x28de:0x1401 for Qualcomm WCN6855
  Bluetooth: btusb: Sort WCN6855 device IDs by VID and PID
  Bluetooth: btusb: QCA: Support downloading custom-made firmwares
  Bluetooth: btnxpuart: Add uevents for FW dump and FW download complete
  Bluetooth: btnxpuart: Correct the Independent Reset handling after FW dump
  Bluetooth: ISO: Support SCM_TIMESTAMPING for ISO TS
  Bluetooth: ISO: add socket option to report packet seqnum via CMSG
  Bluetooth: btintel: Define a macro for Intel Reset vendor command
  Bluetooth: Fix typos in comments
  Bluetooth: RFCOMM: Fix typos in comments
  Bluetooth: aosp: Fix typo in comment
  Bluetooth: hci_bcm4377: Fix typo in comment
  Bluetooth: btrtl: Fix typo in comment
  Bluetooth: btmtk: Fix typo in log string
  ...
====================

Link: https://patch.msgid.link/20250723190233.166823-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-24 18:12:54 -07:00
Jakub Kicinski
126d85fb04 Another wireless update: 
- rtw89:
    - STA+P2P concurrency
    - support for USB devices RTL8851BU/RTL8852BU
  - ath9k: OF support
  - ath12k:
    - more EHT/Wi-Fi 7 features
    - encapsulation/decapsulation offload
  - iwlwifi: some FIPS interoperability
  - brcm80211: support SDIO 43751 device
  - rt2x00: better DT/OF support
  - cfg80211/mac80211:
    - improved S1G support
    - beacon monitor for MLO
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Merge tag 'wireless-next-2025-07-24' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Johannes Berg says:

====================
Another wireless update:
 - rtw89:
   - STA+P2P concurrency
   - support for USB devices RTL8851BU/RTL8852BU
 - ath9k: OF support
 - ath12k:
   - more EHT/Wi-Fi 7 features
   - encapsulation/decapsulation offload
 - iwlwifi: some FIPS interoperability
 - brcm80211: support SDIO 43751 device
 - rt2x00: better DT/OF support
 - cfg80211/mac80211:
   - improved S1G support
   - beacon monitor for MLO

* tag 'wireless-next-2025-07-24' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (199 commits)
  ssb: use new GPIO line value setter callbacks for the second GPIO chip
  wifi: Fix typos
  wifi: brcmsmac: Use str_true_false() helper
  wifi: brcmfmac: fix EXTSAE WPA3 connection failure due to AUTH TX failure
  wifi: brcm80211: Remove yet more unused functions
  wifi: brcm80211: Remove more unused functions
  wifi: brcm80211: Remove unused functions
  wifi: iwlwifi: Revert "wifi: iwlwifi: remove support of several iwl_ppag_table_cmd versions"
  wifi: iwlwifi: check validity of the FW API range
  wifi: iwlwifi: don't export symbols that we shouldn't
  wifi: iwlwifi: mld: use spec link id and not FW link id
  wifi: iwlwifi: mld: decode EOF bit for AMPDUs
  wifi: iwlwifi: Remove support for rx OMI bandwidth reduction
  wifi: iwlwifi: stop supporting iwl_omi_send_status_notif ver 1
  wifi: iwlwifi: remove SC2F firmware support
  wifi: iwlwifi: mvm: Remove NAN support
  wifi: iwlwifi: mld: avoid outdated reorder buffer head_sn
  wifi: iwlwifi: mvm: avoid outdated reorder buffer head_sn
  wifi: iwlwifi: disable certain features for fips_enabled
  wifi: iwlwifi: mld: support channel survey collection for ACS scans
  ...
====================

Link: https://patch.msgid.link/20250724100349.21564-3-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-24 17:25:42 -07:00
Jakub Kicinski
8b5a19b4ff Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-6.16-rc8).

Conflicts:

drivers/net/ethernet/microsoft/mana/gdma_main.c
  9669ddda18 ("net: mana: Fix warnings for missing export.h header inclusion")
  7553911210 ("net: mana: Allocate MSI-X vectors dynamically")
https://lore.kernel.org/20250711130752.23023d98@canb.auug.org.au

Adjacent changes:

drivers/net/ethernet/ti/icssg/icssg_prueth.h
  6e86fb73de ("net: ti: icssg-prueth: Fix buffer allocation for ICSSG")
  ffe8a49091 ("net: ti: icssg-prueth: Read firmware-names from device tree")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-24 11:10:46 -07:00
Paolo Abeni
291d5dc80e ipsec-2025-07-23 
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Merge tag 'ipsec-2025-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec

Steffen Klassert says:

====================
pull request (net): ipsec 2025-07-23

1) Premption fixes for xfrm_state_find.
   From Sabrina Dubroca.

2) Initialize offload path also for SW IPsec GRO. This fixes a
   performance regression on SW IPsec offload.
   From Leon Romanovsky.

3) Fix IPsec UDP GRO for IKE packets.
   From Tobias Brunner,

4) Fix transport header setting for IPcomp after decompressing.
   From Fernando Fernandez Mancera.

5)  Fix use-after-free when xfrmi_changelink tries to change
    collect_md for a xfrm interface.
    From Eyal Birger .

6) Delete the special IPcomp x->tunnel state along with the state x
   to avoid refcount problems.
   From Sabrina Dubroca.

Please pull or let me know if there are problems.

* tag 'ipsec-2025-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
  Revert "xfrm: destroy xfrm_state synchronously on net exit path"
  xfrm: delete x->tunnel as we delete x
  xfrm: interface: fix use-after-free after changing collect_md xfrm interface
  xfrm: ipcomp: adjust transport header after decompressing
  xfrm: Set transport header to fix UDP GRO handling
  xfrm: always initialize offload path
  xfrm: state: use a consistent pcpu_id in xfrm_state_find
  xfrm: state: initialize state_ptrs earlier in xfrm_state_find
====================

Link: https://patch.msgid.link/20250723075417.3432644-1-steffen.klassert@secunet.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-07-24 12:30:40 +02:00
Koen De Schepper
8f9516daed sched: Add enqueue/dequeue of dualpi2 qdisc 
DualPI2 provides L4S-type low latency & loss to traffic that uses a
scalable congestion controller (e.g. TCP-Prague, DCTCP) without
degrading the performance of 'classic' traffic (e.g. Reno,
Cubic etc.). It is to be the reference implementation of IETF RFC9332
DualQ Coupled AQM (https://datatracker.ietf.org/doc/html/rfc9332).

Note that creating two independent queues cannot meet the goal of
DualPI2 mentioned in RFC9332: "...to preserve fairness between
ECN-capable and non-ECN-capable traffic." Further, it could even
lead to starvation of Classic traffic, which is also inconsistent
with the requirements in RFC9332: "...although priority MUST be
bounded in order not to starve Classic traffic." DualPI2 is
designed to maintain approximate per-flow fairness on L-queue and
C-queue by forming a single qdisc using the coupling factor and
scheduler between two queues.

The qdisc provides two queues called low latency and classic. It
classifies packets based on the ECN field in the IP headers. By
default it directs non-ECN and ECT(0) into the classic queue and
ECT(1) and CE into the low latency queue, as per the IETF spec.

Each queue runs its own AQM:
* The classic AQM is called PI2, which is similar to the PIE AQM but
  more responsive and simpler. Classic traffic requires a decent
  target queue (default 15ms for Internet deployment) to fully
  utilize the link and to avoid high drop rates.
* The low latency AQM is, by default, a very shallow ECN marking
  threshold (1ms) similar to that used for DCTCP.

The DualQ isolates the low queuing delay of the Low Latency queue
from the larger delay of the 'Classic' queue. However, from a
bandwidth perspective, flows in either queue will share out the link
capacity as if there was just a single queue. This bandwidth pooling
effect is achieved by coupling together the drop and ECN-marking
probabilities of the two AQMs.

The PI2 AQM has two main parameters in addition to its target delay.
The integral gain factor alpha is used to slowly correct any persistent
standing queue error from the target delay, while the proportional gain
factor beta is used to quickly compensate for queue changes (growth or
shrinkage). Either alpha and beta are given as a parameter, or they can
be calculated by tc from alternative typical and maximum RTT parameters.

Internally, the output of a linear Proportional Integral (PI)
controller is used for both queues. This output is squared to
calculate the drop or ECN-marking probability of the classic queue.
This counterbalances the square-root rate equation of Reno/Cubic,
which is the trick that balances flow rates across the queues. For
the ECN-marking probability of the low latency queue, the output of
the base AQM is multiplied by a coupling factor. This determines the
balance between the flow rates in each queue. The default setting
makes the flow rates roughly equal, which should be generally
applicable.

If DUALPI2 AQM has detected overload (due to excessive non-responsive
traffic in either queue), it will switch to signaling congestion
solely using drop, irrespective of the ECN field. Alternatively, it
can be configured to limit the drop probability and let the queue
grow and eventually overflow (like tail-drop).

GSO splitting in DUALPI2 is configurable from userspace while the
default behavior is to split gso. When running DUALPI2 at unshaped
10gigE with 4 download streams test, splitting gso apart results in
halving the latency with no loss in throughput:

Summary of tcp_4down run 'no_split_gso':
                         avg         median      # data pts
 Ping (ms) ICMP   :       0.53      0.30 ms         350
 TCP download avg :    2326.86       N/A Mbits/s    350
 TCP download sum :    9307.42       N/A Mbits/s    350
 TCP download::1  :    2672.99   2568.73 Mbits/s    350
 TCP download::2  :    2586.96   2570.51 Mbits/s    350
 TCP download::3  :    1786.26   1798.82 Mbits/s    350
 TCP download::4  :    2261.21   2309.49 Mbits/s    350

Summart of tcp_4down run 'split_gso':
                         avg          median      # data pts
 Ping (ms) ICMP   :       0.22      0.23 ms         350
 TCP download avg :    2335.02       N/A Mbits/s    350
 TCP download sum :    9340.09       N/A Mbits/s    350
 TCP download::1  :    2335.30   2334.22 Mbits/s    350
 TCP download::2  :    2334.72   2334.20 Mbits/s    350
 TCP download::3  :    2335.28   2334.58 Mbits/s    350
 TCP download::4  :    2334.79   2334.39 Mbits/s    350

A similar result is observed when running DUALPI2 at unshaped 1gigE
with 1 download stream test:

Summary of tcp_1down run 'no_split_gso':
                         avg         median      # data pts
 Ping (ms) ICMP :         1.13      1.25 ms         350
 TCP download   :       941.41    941.46 Mbits/s    350

Summart of tcp_1down run 'split_gso':
                         avg         median      # data pts
 Ping (ms) ICMP :         0.51      0.55 ms         350
 TCP download   :       941.41    941.45 Mbits/s    350

Additional details can be found in the draft:
  https://datatracker.ietf.org/doc/html/rfc9332

Signed-off-by: Koen De Schepper <koen.de_schepper@nokia-bell-labs.com>
Co-developed-by: Olga Albisser <olga@albisser.org>
Signed-off-by: Olga Albisser <olga@albisser.org>
Co-developed-by: Olivier Tilmans <olivier.tilmans@nokia.com>
Signed-off-by: Olivier Tilmans <olivier.tilmans@nokia.com>
Co-developed-by: Henrik Steen <henrist@henrist.net>
Signed-off-by: Henrik Steen <henrist@henrist.net>
Co-developed-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>
Signed-off-by: Bob Briscoe <research@bobbriscoe.net>
Signed-off-by: Ilpo Järvinen <ij@kernel.org>
Acked-by: Dave Taht <dave.taht@gmail.com>
Link: https://patch.msgid.link/20250722095915.24485-4-chia-yu.chang@nokia-bell-labs.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-23 17:52:07 -07:00
Byungchul Park
9dfd871a3e libeth: xdp: access ->pp through netmem_desc instead of page 
To eliminate the use of struct page in page pool, the page pool users
should use netmem descriptor and APIs instead.

Make xdp access ->pp through netmem_desc instead of page.

Signed-off-by: Byungchul Park <byungchul@sk.com>
Link: https://patch.msgid.link/20250721021835.63939-13-byungchul@sk.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-23 17:46:56 -07:00
Byungchul Park
89ade7c730 netmem, mlx4: access ->pp_ref_count through netmem_desc instead of page 
To eliminate the use of struct page in page pool, the page pool users
should use netmem descriptor and APIs instead.

Make mlx4 access ->pp_ref_count through netmem_desc instead of page.

While at it, add a helper, pp_page_to_nmdesc() and __pp_page_to_nmdesc(),
that can be used to get netmem_desc from page only if it's a pp page.
For now that netmem_desc overlays on page, it can be achieved by just
casting, and use macro and _Generic to cover const casting as well.

Plus, change page_pool_page_is_pp() to check for 'const struct page *'
instead of 'struct page *' since it doesn't modify data and additionally
covers const type.

Signed-off-by: Byungchul Park <byungchul@sk.com>
Link: https://patch.msgid.link/20250721021835.63939-4-byungchul@sk.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-23 17:46:54 -07:00
Byungchul Park
38a436d4e2 netmem: use netmem_desc instead of page to access ->pp in __netmem_get_pp() 
To eliminate the use of the page pool fields in struct page, the page
pool code should use netmem descriptor and APIs instead.

However, __netmem_get_pp() still accesses ->pp via struct page.  So
change it to use struct netmem_desc instead, since ->pp no longer will
be available in struct page.

While at it, add a helper, __netmem_to_nmdesc(), that can be used to
unsafely get pointer to netmem_desc backing the netmem_ref, only when
the netmem_ref is always backed by system memory.

Signed-off-by: Byungchul Park <byungchul@sk.com>
Link: https://patch.msgid.link/20250721021835.63939-3-byungchul@sk.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-23 17:46:54 -07:00
Byungchul Park
f3d85c9ee5 netmem: introduce struct netmem_desc mirroring struct page 
To simplify struct page, the page pool members of struct page should be
moved to other, allowing these members to be removed from struct page.

Introduce a network memory descriptor to store the members, struct
netmem_desc, and make it union'ed with the existing fields in struct
net_iov, allowing to organize the fields of struct net_iov.

Signed-off-by: Byungchul Park <byungchul@sk.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Harry Yoo <harry.yoo@oracle.com>
Link: https://patch.msgid.link/20250721021835.63939-2-byungchul@sk.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-23 17:46:54 -07:00
Yang Li
a7bcffc673 Bluetooth: Add PA_LINK to distinguish BIG sync and PA sync connections 
Currently, BIS_LINK is used for both BIG sync and PA sync connections,
which makes it impossible to distinguish them when searching for a PA
sync connection.

Adding PA_LINK will make the distinction clearer and simplify future
extensions for PA-related features.

Signed-off-by: Yang Li <yang.li@amlogic.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:35:14 -04:00
Chris Down
0cadf8534f Bluetooth: hci_event: Mask data status from LE ext adv reports 
The Event_Type field in an LE Extended Advertising Report uses bits 5
and 6 for data status (e.g. truncation or fragmentation), not the PDU
type itself.

The ext_evt_type_to_legacy() function fails to mask these status bits
before evaluation. This causes valid advertisements with status bits set
(e.g. a truncated non-connectable advertisement, which ends up showing
as PDU type 0x40) to be misclassified as unknown and subsequently
dropped. This is okay for most checks which use bitwise AND on the
relevant event type bits, but it doesn't work for non-connectable types,
which are checked with '== LE_EXT_ADV_NON_CONN_IND' (that is, zero).

In terms of behaviour, first the device sends a truncated report:

> HCI Event: LE Meta Event (0x3e) plen 26
      LE Extended Advertising Report (0x0d)
        Entry 0
          Event type: 0x0040
            Data status: Incomplete, data truncated, no more to come
          Address type: Random (0x01)
          Address: 1D:12:46:FA:F8:6E (Non-Resolvable)
          SID: 0x03
          RSSI: -98 dBm (0x9e)
          Data length: 0x00

Then, a few seconds later, it sends the subsequent complete report:

> HCI Event: LE Meta Event (0x3e) plen 122
      LE Extended Advertising Report (0x0d)
        Entry 0
          Event type: 0x0000
            Data status: Complete
          Address type: Random (0x01)
          Address: 1D:12:46:FA:F8:6E (Non-Resolvable)
          SID: 0x03
          RSSI: -97 dBm (0x9f)
          Data length: 0x60
          Service Data: Google (0xfef3)
            Data[92]: ...

These devices often send multiple truncated reports per second.

This patch introduces a PDU type mask to ensure only the relevant bits
are evaluated, allowing for the correct translation of all valid
extended advertising packets.

Fixes: b2cc9761f1 ("Bluetooth: Handle extended ADV PDU types")
Signed-off-by: Chris Down <chris@chrisdown.name>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:34:47 -04:00
Arseniy Krasnov
2935e55685 Bluetooth: hci_sync: fix double free in 'hci_discovery_filter_clear()' 
Function 'hci_discovery_filter_clear()' frees 'uuids' array and then
sets it to NULL. There is a tiny chance of the following race:

'hci_cmd_sync_work()'

 'update_passive_scan_sync()'

   'hci_update_passive_scan_sync()'

     'hci_discovery_filter_clear()'
       kfree(uuids);

       <-------------------------preempted-------------------------------->
                                           'start_service_discovery()'

                                             'hci_discovery_filter_clear()'
                                               kfree(uuids); // DOUBLE FREE

       <-------------------------preempted-------------------------------->

      uuids = NULL;

To fix it let's add locking around 'kfree()' call and NULL pointer
assignment. Otherwise the following backtrace fires:

[ ] ------------[ cut here ]------------
[ ] kernel BUG at mm/slub.c:547!
[ ] Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
[ ] CPU: 3 UID: 0 PID: 246 Comm: bluetoothd Tainted: G O 6.12.19-kernel #1
[ ] Tainted: [O]=OOT_MODULE
[ ] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ ] pc : __slab_free+0xf8/0x348
[ ] lr : __slab_free+0x48/0x348
...
[ ] Call trace:
[ ]  __slab_free+0xf8/0x348
[ ]  kfree+0x164/0x27c
[ ]  start_service_discovery+0x1d0/0x2c0
[ ]  hci_sock_sendmsg+0x518/0x924
[ ]  __sock_sendmsg+0x54/0x60
[ ]  sock_write_iter+0x98/0xf8
[ ]  do_iter_readv_writev+0xe4/0x1c8
[ ]  vfs_writev+0x128/0x2b0
[ ]  do_writev+0xfc/0x118
[ ]  __arm64_sys_writev+0x20/0x2c
[ ]  invoke_syscall+0x68/0xf0
[ ]  el0_svc_common.constprop.0+0x40/0xe0
[ ]  do_el0_svc+0x1c/0x28
[ ]  el0_svc+0x30/0xd0
[ ]  el0t_64_sync_handler+0x100/0x12c
[ ]  el0t_64_sync+0x194/0x198
[ ] Code: 8b0002e6 eb17031f 54fffbe1 d503201f (d4210000)
[ ] ---[ end trace 0000000000000000 ]---

Fixes: ad383c2c65 ("Bluetooth: hci_sync: Enable advertising when LL privacy is enabled")
Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:33:30 -04:00
Pauli Virtanen
7565bc5659 Bluetooth: ISO: add socket option to report packet seqnum via CMSG 
User applications need a way to track which ISO interval a given SDU
belongs to, to properly detect packet loss. All controllers do not set
timestamps, and it's not guaranteed user application receives all packet
reports (small socket buffer, or controller doesn't send all reports
like Intel AX210 is doing).

Add socket option BT_PKT_SEQNUM that enables reporting of received
packet ISO sequence number in BT_SCM_PKT_SEQNUM CMSG.

Use BT_PKT_SEQNUM == 22 for the socket option, as 21 was used earlier
for a removed experimental feature that never got into mainline.

Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:31:19 -04:00
Yang Li
be31d11ec9 Bluetooth: Fix spelling mistakes 
Correct the misspelling of “estabilished” in the code.

Signed-off-by: Yang Li <yang.li@amlogic.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:27:33 -04:00
Yang Li
b2a5f2e1c1 Bluetooth: hci_event: Add support for handling LE BIG Sync Lost event 
When the BIS source stops, the controller sends an LE BIG Sync Lost
event (subevent 0x1E). Currently, this event is not handled, causing
the BIS stream to remain active in BlueZ and preventing recovery.

Signed-off-by: Yang Li <yang.li@amlogic.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:27:04 -04:00
Yue Haibing
70c672f933 Bluetooth: Remove hci_conn_hash_lookup_state() 
Since commit 4aa42119d9 ("Bluetooth: Remove pending ACL connection
attempts") this function is unused.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-23 10:24:41 -04:00
Miri Korenblit
69fdb08435 wifi: mac80211: don't require cipher and keylen in gtk rekey 
ieee80211_add_gtk_rekey receives a keyconf as an argument, and the
cipher and keylen are taken from there to the new allocated key.
But in rekey, both the cipher and the keylen should be the same as of
the old key, so let ieee80211_add_gtk_rekey find those, so drivers won't
have to fill it in.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250721214922.3c5c023bfae9.Ie6594ae2b4b6d5b3d536e642b349046ebfce7a5d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-07-22 10:43:19 +02:00
Michael-CY Lee
84b62b72b4 wifi: cfg80211/mac80211: report link ID for unexpected frames 
The upper layer may require the link ID to properly handle
unexpected frames. For instance, if hostapd, operating as an
AP MLD, receives a data frame from a non-associated STA,
it must send deauthentication to the link on which the STA is
operating.

Signed-off-by: Michael-CY Lee <michael-cy.lee@mediatek.com>
Reviewed-by: Money Wang <money.wang@mediatek.com>
Link: https://patch.msgid.link/20250721065159.1740992-1-michael-cy.lee@mediatek.com
[edit commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-07-21 19:40:59 +02:00
Miri Korenblit
460114eae8 wifi: mac80211: remove ieee80211_remove_key 
It is no longer used, remove it.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250721091956.e964ceacd85c.Idecab8ef161fa58e000b3969bc936399284b79f0@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-07-21 19:35:17 +02:00
Jesper Dangaard Brouer
a6f190630d net: track pfmemalloc drops via SKB_DROP_REASON_PFMEMALLOC 
Add a new SKB drop reason (SKB_DROP_REASON_PFMEMALLOC) to track packets
dropped due to memory pressure. In production environments, we've observed
memory exhaustion reported by memory layer stack traces, but these drops
were not properly tracked in the SKB drop reason infrastructure.

While most network code paths now properly report pfmemalloc drops, some
protocol-specific socket implementations still use sk_filter() without
drop reason tracking:
- Bluetooth L2CAP sockets
- CAIF sockets
- IUCV sockets
- Netlink sockets
- SCTP sockets
- Unix domain sockets

These remaining cases represent less common paths and could be converted
in a follow-up patch if needed. The current implementation provides
significantly improved observability into memory pressure events in the
network stack, especially for key protocols like TCP and UDP, helping to
diagnose problems in production environments.

Reported-by: Matt Fleming <mfleming@cloudflare.com>
Signed-off-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://patch.msgid.link/175268316579.2407873.11634752355644843509.stgit@firesoul
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-18 16:59:05 -07:00
Alexei Starovoitov
beb1097ec8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after rc6 
Cross-merge BPF and other fixes after downstream PR.

No conflicts.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2025-07-18 12:15:59 -07:00
Lachlan Hodges
bbf93a06d7 wifi: mac80211: support initialising an S1G short beaconing BSS 
Introduce the ability to parse the short beacon data and long
beacon period. The long beacon period represents the number of beacon
intervals between each long beacon transmission. Additionally,
as a BSS cannot change its configuration such that short beaconing
is dynamically disabled/enabled without tearing down the interface
- we ensure we have an existing short beacon before performing
the update.

Signed-off-by: Lachlan Hodges <lachlan.hodges@morsemicro.com>
Link: https://patch.msgid.link/20250717074205.312577-3-lachlan.hodges@morsemicro.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-07-18 14:14:43 +02:00
Lachlan Hodges
6624a0af82 wifi: cfg80211: support configuring an S1G short beaconing BSS 
S1G short beacons are an optional frame type used in an S1G BSS
that contain a limited set of elements. While they are optional,
they are a fundamental part of S1G that enables significant
power saving.

Expose 2 additional netlink attributes,
NL80211_ATTR_S1G_LONG_BEACON_PERIOD which denotes the number of beacon
intervals between each long beacon and NL80211_ATTR_S1G_SHORT_BEACON
which is a nested attribute containing the short beacon tail and
head. We split them as the long beacon period cannot be updated,
and is only used when initialisng the interface, whereas the short
beacon data can be used to both initialise and update the templates.
This follows how things such as the beacon interval and DTIM period
currently operate.

During the initialisation path, we ensure we have the long beacon
period if the short beacon data is being passed down, whereas
the update path will simply update the template if its sent down.

The short beacon data is validated using the same routines for regular
beacons as they support correctly parsing the short beacon format
while ensuring the frame is well-formed.

Signed-off-by: Lachlan Hodges <lachlan.hodges@morsemicro.com>
Link: https://patch.msgid.link/20250717074205.312577-2-lachlan.hodges@morsemicro.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 2025-07-18 14:14:43 +02:00
Kuniyuki Iwashima
dc2a27e524 neighbour: Update pneigh_entry in pneigh_create(). 
neigh_add() updates pneigh_entry() found or created by pneigh_create().

This update is serialised by RTNL, but we will remove it.

Let's move the update part to pneigh_create() and make it return errno
instead of a pointer of pneigh_entry.

Now, the pneigh code is RTNL free.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250716221221.442239-16-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 16:25:22 -07:00
Kuniyuki Iwashima
13a936bb99 neighbour: Protect tbl->phash_buckets[] with a dedicated mutex. 
tbl->phash_buckets[] is only modified in the slow path by pneigh_create()
and pneigh_delete() under the table lock.

Both of them are called under RTNL, so no extra lock is needed, but we
will remove RTNL from the paths.

pneigh_create() looks up a pneigh_entry, and this part can be lockless,
but it would complicate the logic like

  1. lookup
  2. allocate pengih_entry for GFP_KERNEL
  3. lookup again but under lock
  4. if found, return it after freeing the allocated memory
  5. else, return the new one

Instead, let's add a per-table mutex and run lookup and allocation
under it.

Note that updating pneigh_entry part in neigh_add() is still protected
by RTNL and will be moved to pneigh_create() in the next patch.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250716221221.442239-15-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 16:25:21 -07:00
Kuniyuki Iwashima
dd103c9a53 neighbour: Remove __pneigh_lookup(). 
__pneigh_lookup() is the lockless version of pneigh_lookup(),
but its only caller pndisc_is_router() holds the table lock and
reads pneigh_netry.flags.

This is because accessing pneigh_entry after pneigh_lookup() was
illegal unless the caller holds RTNL or the table lock.

Now, pneigh_entry is guaranteed to be alive during the RCU critical
section.

Let's call pneigh_lookup() and use READ_ONCE() for n->flags in
pndisc_is_router() and remove __pneigh_lookup().

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250716221221.442239-13-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 16:25:21 -07:00
Kuniyuki Iwashima
d539d8fbd8 neighbour: Free pneigh_entry after RCU grace period. 
We will convert RTM_GETNEIGH to RCU.

neigh_get() looks up pneigh_entry by pneigh_lookup() and passes
it to pneigh_fill_info().

Then, we must ensure that the entry is alive till pneigh_fill_info()
completes, but read_lock_bh(&tbl->lock) in pneigh_lookup() does not
guarantee that.

Also, we will convert all readers of tbl->phash_buckets[] to RCU.

Let's use call_rcu() to free pneigh_entry and update phash_buckets[]
and ->next by rcu_assign_pointer().

pneigh_ifdown_and_unlock() uses list_head to avoid overwriting
->next and moving RCU iterators to another list.

pndisc_destructor() (only IPv6 ndisc uses this) uses a mutex, so it
is not delayed to call_rcu(), where we cannot sleep.  This is fine
because the mcast code works with RCU and ipv6_dev_mc_dec() frees
mcast objects after RCU grace period.

While at it, we change the return type of pneigh_ifdown_and_unlock()
to void.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250716221221.442239-8-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 16:25:20 -07:00
Kuniyuki Iwashima
d63382aea7 neighbour: Annotate neigh_table.phash_buckets and pneigh_entry.next with __rcu. 
The next patch will free pneigh_entry with call_rcu().

Then, we need to annotate neigh_table.phash_buckets[] and
pneigh_entry.next with __rcu.

To make the next patch cleaner, let's annotate the fields in advance.

Currently, all accesses to the fields are under the neigh table lock,
so rcu_dereference_protected() is used with 1 for now, but most of them
(except in pneigh_delete() and pneigh_ifdown_and_unlock()) will be
replaced with rcu_dereference() and rcu_dereference_check().

Note that pneigh_ifdown_and_unlock() changes pneigh_entry.next to a
local list, which is illegal because the RCU iterator could be moved
to another list.  This part will be fixed in the next patch.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250716221221.442239-7-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 16:25:20 -07:00
Kuniyuki Iwashima
e804bd83c1 neighbour: Split pneigh_lookup(). 
pneigh_lookup() has ASSERT_RTNL() in the middle of the function, which
is confusing.

When called with the last argument, creat, 0, pneigh_lookup() literally
looks up a proxy neighbour entry.  This is the case of the reader path
as the fast path and RTM_GETNEIGH.

pneigh_lookup(), however, creates a pneigh_entry when called with creat 1
from RTM_NEWNEIGH and SIOCSARP, which require RTNL.

Let's split pneigh_lookup() into two functions.

We will convert all the reader paths to RCU, and read_lock_bh(&tbl->lock)
in the new pneigh_lookup() will be dropped.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250716221221.442239-6-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 16:25:20 -07:00
Jakub Kicinski
af2d6148d2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-6.16-rc7).

Conflicts:

Documentation/netlink/specs/ovpn.yaml
  880d43ca9a ("netlink: specs: clean up spaces in brackets")
  af52020fc5 ("ovpn: reject unexpected netlink attributes")

drivers/net/phy/phy_device.c
  a44312d58e ("net: phy: Don't register LEDs for genphy")
  f0f2b992d8 ("net: phy: Don't register LEDs for genphy")
https://lore.kernel.org/20250710114926.7ec3a64f@kernel.org

drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
drivers/net/wireless/intel/iwlwifi/mld/regulatory.c
  5fde0fcbd7 ("wifi: iwlwifi: mask reserved bits in chan_state_active_bitmap")
  ea045a0de3 ("wifi: iwlwifi: add support for accepting raw DSM tables by firmware")

net/ipv6/mcast.c
  ae3264a25a ("ipv6: mcast: Delay put pmc->idev in mld_del_delrec()")
  a8594c956c ("ipv6: mcast: Avoid a duplicate pointer check in mld_del_delrec()")
https://lore.kernel.org/8cc52891-3653-4b03-a45e-05464fe495cf@kernel.org

No adjacent changes.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 11:00:33 -07:00
Jakub Kicinski
a2bbaff681 bluetooth pull request for net: 
- hci_sync: fix connectable extended advertising when using static random address
  - hci_core: fix typos in macros
  - hci_core: add missing braces when using macro parameters
  - hci_core: replace 'quirks' integer by 'quirk_flags' bitmap
  - SMP: If an unallowed command is received consider it a failure
  - SMP: Fix using HCI_ERROR_REMOTE_USER_TERM on timeout
  - L2CAP: Fix null-ptr-deref in l2cap_sock_resume_cb()
  - L2CAP: Fix attempting to adjust outgoing MTU
  - btintel: Check if controller is ISO capable on btintel_classify_pkt_type
  - btusb: QCA: Fix downloading wrong NVM for WCN6855 GF variant without board ID
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Merge tag 'for-net-2025-07-17' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - hci_sync: fix connectable extended advertising when using static random address
 - hci_core: fix typos in macros
 - hci_core: add missing braces when using macro parameters
 - hci_core: replace 'quirks' integer by 'quirk_flags' bitmap
 - SMP: If an unallowed command is received consider it a failure
 - SMP: Fix using HCI_ERROR_REMOTE_USER_TERM on timeout
 - L2CAP: Fix null-ptr-deref in l2cap_sock_resume_cb()
 - L2CAP: Fix attempting to adjust outgoing MTU
 - btintel: Check if controller is ISO capable on btintel_classify_pkt_type
 - btusb: QCA: Fix downloading wrong NVM for WCN6855 GF variant without board ID

* tag 'for-net-2025-07-17' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: L2CAP: Fix attempting to adjust outgoing MTU
  Bluetooth: btusb: QCA: Fix downloading wrong NVM for WCN6855 GF variant without board ID
  Bluetooth: hci_dev: replace 'quirks' integer by 'quirk_flags' bitmap
  Bluetooth: hci_core: add missing braces when using macro parameters
  Bluetooth: hci_core: fix typos in macros
  Bluetooth: SMP: Fix using HCI_ERROR_REMOTE_USER_TERM on timeout
  Bluetooth: SMP: If an unallowed command is received consider it a failure
  Bluetooth: btintel: Check if controller is ISO capable on btintel_classify_pkt_type
  Bluetooth: hci_sync: fix connectable extended advertising when using static random address
  Bluetooth: Fix null-ptr-deref in l2cap_sock_resume_cb()
====================

Link: https://patch.msgid.link/20250717142849.537425-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2025-07-17 07:54:49 -07:00
Paolo Abeni
44eb62e1ea Another set of changes, notably: 
- cfg80211: fix double-free introduced earlier
  - mac80211: fix RCU iteration in CSA
  - iwlwifi: many cleanups (unused FW APIs, PCIe code, WoWLAN)
  - mac80211: some work around how FIPS affects wifi, which was
              wrong (RC4 is used by TKIP, not only WEP)
  - cfg/mac80211: improvements for unsolicated probe response
                  handling
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Merge tag 'wireless-next-2025-07-17' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Johannes Berg says:

====================
Another set of changes, notably:
 - cfg80211: fix double-free introduced earlier
 - mac80211: fix RCU iteration in CSA
 - iwlwifi: many cleanups (unused FW APIs, PCIe code, WoWLAN)
 - mac80211: some work around how FIPS affects wifi, which was
             wrong (RC4 is used by TKIP, not only WEP)
 - cfg/mac80211: improvements for unsolicated probe response
                 handling

* tag 'wireless-next-2025-07-17' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (64 commits)
  wifi: cfg80211: fix double free for link_sinfo in nl80211_station_dump()
  wifi: cfg80211: fix off channel operation allowed check for MLO
  wifi: mac80211: use RCU-safe iteration in ieee80211_csa_finish
  wifi: mac80211_hwsim: Update comments in header
  wifi: mac80211: parse unsolicited broadcast probe response data
  wifi: cfg80211: parse attribute to update unsolicited probe response template
  wifi: mac80211: don't use TPE data from assoc response
  wifi: mac80211: handle WLAN_HT_ACTION_NOTIFY_CHANWIDTH async
  wifi: mac80211: simplify __ieee80211_rx_h_amsdu() loop
  wifi: mac80211: don't mark keys for inactive links as uploaded
  wifi: mac80211: only assign chanctx in reconfig
  wifi: mac80211_hwsim: Declare support for AP scanning
  wifi: mac80211: clean up cipher suite handling
  wifi: mac80211: don't send keys to driver when fips_enabled
  wifi: cfg80211: Fix interface type validation
  wifi: mac80211: remove ieee80211_link_unreserve_chanctx() return value
  wifi: mac80211: don't unreserve never reserved chanctx
  mwl8k: Add missing check after DMA map
  wifi: mac80211: make VHT opmode NSS ignore a debug message
  wifi: iwlwifi: remove support of several iwl_ppag_table_cmd versions
  ...
====================

Link: https://patch.msgid.link/20250717094610.20106-47-johannes@sipsolutions.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-07-17 15:00:41 +02:00
Paolo Abeni
e49f95dc8c Couple of fixes: 
- ath12k performance regression from -rc1
  - cfg80211 counted_by() removal for scan request
    as it doesn't match usage and keeps complaining
  - iwlwifi crash with certain older devices
  - iwlwifi missing an error path unlock
  - iwlwifi compatibility with certain BIOS updates
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Merge tag 'wireless-2025-07-17' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless

Johannes Berg says:

====================
Couple of fixes:
 - ath12k performance regression from -rc1
 - cfg80211 counted_by() removal for scan request
   as it doesn't match usage and keeps complaining
 - iwlwifi crash with certain older devices
 - iwlwifi missing an error path unlock
 - iwlwifi compatibility with certain BIOS updates

* tag 'wireless-2025-07-17' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  wifi: iwlwifi: Fix botched indexing conversion
  wifi: cfg80211: remove scan request n_channels counted_by
  wifi: ath12k: Fix packets received in WBM error ring with REO LUT enabled
  wifi: iwlwifi: mask reserved bits in chan_state_active_bitmap
  wifi: iwlwifi: pcie: fix locking on invalid TOP reset
====================

Link: https://patch.msgid.link/20250717091831.18787-5-johannes@sipsolutions.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-07-17 14:52:42 +02:00
Florian Westphal
2d72afb340 netfilter: nf_conntrack: fix crash due to removal of uninitialised entry 
A crash in conntrack was reported while trying to unlink the conntrack
entry from the hash bucket list:
    [exception RIP: __nf_ct_delete_from_lists+172]
    [..]
 #7 [ff539b5a2b043aa0] nf_ct_delete at ffffffffc124d421 [nf_conntrack]
 #8 [ff539b5a2b043ad0] nf_ct_gc_expired at ffffffffc124d999 [nf_conntrack]
 #9 [ff539b5a2b043ae0] __nf_conntrack_find_get at ffffffffc124efbc [nf_conntrack]
    [..]

The nf_conn struct is marked as allocated from slab but appears to be in
a partially initialised state:

 ct hlist pointer is garbage; looks like the ct hash value
 (hence crash).
 ct->status is equal to IPS_CONFIRMED|IPS_DYING, which is expected
 ct->timeout is 30000 (=30s), which is unexpected.

Everything else looks like normal udp conntrack entry.  If we ignore
ct->status and pretend its 0, the entry matches those that are newly
allocated but not yet inserted into the hash:
  - ct hlist pointers are overloaded and store/cache the raw tuple hash
  - ct->timeout matches the relative time expected for a new udp flow
    rather than the absolute 'jiffies' value.

If it were not for the presence of IPS_CONFIRMED,
__nf_conntrack_find_get() would have skipped the entry.

Theory is that we did hit following race:

cpu x 			cpu y			cpu z
 found entry E		found entry E
 E is expired		<preemption>
 nf_ct_delete()
 return E to rcu slab
					init_conntrack
					E is re-inited,
					ct->status set to 0
					reply tuplehash hnnode.pprev
					stores hash value.

cpu y found E right before it was deleted on cpu x.
E is now re-inited on cpu z.  cpu y was preempted before
checking for expiry and/or confirm bit.

					->refcnt set to 1
					E now owned by skb
					->timeout set to 30000

If cpu y were to resume now, it would observe E as
expired but would skip E due to missing CONFIRMED bit.

					nf_conntrack_confirm gets called
					sets: ct->status |= CONFIRMED
					This is wrong: E is not yet added
					to hashtable.

cpu y resumes, it observes E as expired but CONFIRMED:
			<resumes>
			nf_ct_expired()
			 -> yes (ct->timeout is 30s)
			confirmed bit set.

cpu y will try to delete E from the hashtable:
			nf_ct_delete() -> set DYING bit
			__nf_ct_delete_from_lists

Even this scenario doesn't guarantee a crash:
cpu z still holds the table bucket lock(s) so y blocks:

			wait for spinlock held by z

					CONFIRMED is set but there is no
					guarantee ct will be added to hash:
					"chaintoolong" or "clash resolution"
					logic both skip the insert step.
					reply hnnode.pprev still stores the
					hash value.

					unlocks spinlock
					return NF_DROP
			<unblocks, then
			 crashes on hlist_nulls_del_rcu pprev>

In case CPU z does insert the entry into the hashtable, cpu y will unlink
E again right away but no crash occurs.

Without 'cpu y' race, 'garbage' hlist is of no consequence:
ct refcnt remains at 1, eventually skb will be free'd and E gets
destroyed via: nf_conntrack_put -> nf_conntrack_destroy -> nf_ct_destroy.

To resolve this, move the IPS_CONFIRMED assignment after the table
insertion but before the unlock.

Pablo points out that the confirm-bit-store could be reordered to happen
before hlist add resp. the timeout fixup, so switch to set_bit and
before_atomic memory barrier to prevent this.

It doesn't matter if other CPUs can observe a newly inserted entry right
before the CONFIRMED bit was set:

Such event cannot be distinguished from above "E is the old incarnation"
case: the entry will be skipped.

Also change nf_ct_should_gc() to first check the confirmed bit.

The gc sequence is:
 1. Check if entry has expired, if not skip to next entry
 2. Obtain a reference to the expired entry.
 3. Call nf_ct_should_gc() to double-check step 1.

nf_ct_should_gc() is thus called only for entries that already failed an
expiry check. After this patch, once the confirmed bit check passes
ct->timeout has been altered to reflect the absolute 'best before' date
instead of a relative time.  Step 3 will therefore not remove the entry.

Without this change to nf_ct_should_gc() we could still get this sequence:

 1. Check if entry has expired.
 2. Obtain a reference.
 3. Call nf_ct_should_gc() to double-check step 1:
    4 - entry is still observed as expired
    5 - meanwhile, ct->timeout is corrected to absolute value on other CPU
      and confirm bit gets set
    6 - confirm bit is seen
    7 - valid entry is removed again

First do check 6), then 4) so the gc expiry check always picks up either
confirmed bit unset (entry gets skipped) or expiry re-check failure for
re-inited conntrack objects.

This change cannot be backported to releases before 5.19. Without
commit 8a75a2c174 ("netfilter: conntrack: remove unconfirmed list")
|= IPS_CONFIRMED line cannot be moved without further changes.

Cc: Razvan Cojocaru <rzvncj@gmail.com>
Link: https://lore.kernel.org/netfilter-devel/20250627142758.25664-1-fw@strlen.de/
Link: https://lore.kernel.org/netfilter-devel/4239da15-83ff-4ca4-939d-faef283471bb@gmail.com/
Fixes: 1397af5bfd ("netfilter: conntrack: remove the percpu dying list")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 2025-07-17 11:23:33 +02:00
Christian Eggers
6851a0c228 Bluetooth: hci_dev: replace 'quirks' integer by 'quirk_flags' bitmap 
The 'quirks' member already ran out of bits on some platforms some time
ago. Replace the integer member by a bitmap in order to have enough bits
in future. Replace raw bit operations by accessor macros.

Fixes: ff26b2dd65 ("Bluetooth: Add quirk for broken READ_VOICE_SETTING")
Fixes: 127881334e ("Bluetooth: Add quirk for broken READ_PAGE_SCAN_TYPE")
Suggested-by: Pauli Virtanen <pav@iki.fi>
Tested-by: Ivan Pravdin <ipravdin.official@gmail.com>
Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-16 15:37:53 -04:00
Christian Eggers
cdee6a4416 Bluetooth: hci_core: add missing braces when using macro parameters 
Macro parameters should always be put into braces when accessing it.

Fixes: 4fc9857ab8 ("Bluetooth: hci_sync: Add check simultaneous roles support")
Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-16 15:37:37 -04:00
Christian Eggers
dfef8d87a0 Bluetooth: hci_core: fix typos in macros 
The provided macro parameter is named 'dev' (rather than 'hdev', which
may be a variable on the stack where the macro is used).

Fixes: a9a830a676 ("Bluetooth: hci_event: Fix sending HCI_OP_READ_ENC_KEY_SIZE")
Fixes: 6126ffabba ("Bluetooth: Introduce HCI_CONN_FLAG_DEVICE_PRIVACY device flag")
Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
 2025-07-16 15:34:06 -04:00
Matt Johnston
3549eb08e5 net: mctp: Allow limiting binds to a peer address 
Prior to calling bind() a program may call connect() on a socket to
restrict to a remote peer address.

Using connect() is the normal mechanism to specify a remote network
peer, so we use that here. In MCTP connect() is only used for bound
sockets - send() is not available for MCTP since a tag must be provided
for each message.

The smctp_type must match between connect() and bind() calls.

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Link: https://patch.msgid.link/20250710-mctp-bind-v4-6-8ec2f6460c56@codeconstruct.com.au
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-07-15 12:08:39 +02:00
Matt Johnston
1aeed732f4 net: mctp: Use hashtable for binds 
Ensure that a specific EID (remote or local) bind will match in
preference to a MCTP_ADDR_ANY bind.

This adds infrastructure for binding a socket to receive messages from a
specific remote peer address, a future commit will expose an API for
this.

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Link: https://patch.msgid.link/20250710-mctp-bind-v4-5-8ec2f6460c56@codeconstruct.com.au
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-07-15 12:08:39 +02:00