Chuyi Zhou dfab99df14 bpf: teach the verifier to enforce css_iter and task_iter in RCU CS ... css_iter and task_iter should be used in rcu section. Specifically, in sleepable progs explicit bpf_rcu_read_lock() is needed before use these iters. In normal bpf progs that have implicit rcu_read_lock(), it's OK to use them directly. This patch adds a new a KF flag KF_RCU_PROTECTED for bpf_iter_task_new and bpf_iter_css_new. It means the kfunc should be used in RCU CS. We check whether we are in rcu cs before we want to invoke this kfunc. If the rcu protection is guaranteed, we would let st->type = PTR_TO_STACK | MEM_RCU. Once user do rcu_unlock during the iteration, state MEM_RCU of regs would be cleared. is_iter_reg_valid_init() will reject if reg->type is UNTRUSTED. It is worth noting that currently, bpf_rcu_read_unlock does not clear the state of the STACK_ITER reg, since bpf_for_each_spilled_reg only considers STACK_SPILL. This patch also let bpf_for_each_spilled_reg search STACK_ITER. Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20231018061746.111364-6-zhouchuyi@bytedance.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2023-10-19 17:02:46 -07:00
..
bpf	bpf: teach the verifier to enforce css_iter and task_iter in RCU CS	2023-10-19 17:02:46 -07:00
cgroup	cgroup: Prepare for using css_task_iter_*() in BPF	2023-10-19 17:02:46 -07:00
configs	Kbuild updates for v6.6	2023-09-05 11:01:47 -07:00
debug	printk changes for 6.6	2023-09-04 13:20:19 -07:00
dma	swiotlb: fix the check whether a device has used software IO TLB	2023-09-27 11:19:15 +02:00
entry	entry: Remove empty addr_limit_user_check()	2023-08-23 10:32:39 +02:00
events	powerpc updates for 6.6	2023-08-31 12:43:10 -07:00
futex	mm/mm_init.c: remove obsolete macro HASH_SMALL	2023-08-18 10:12:07 -07:00
gcov	gcov: shut up missing prototype warnings for internal stubs	2023-08-18 10:18:58 -07:00
irq	Boring updates for the interrupt subsystem:	2023-08-28 14:33:11 -07:00
kcsan	kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures	2023-06-09 23:29:50 +10:00
livepatch	livepatch: Make 'klp_stack_entries' static	2023-06-05 13:56:52 +02:00
locking	- An extensive rework of kexec and crash Kconfig from Eric DeVolder	2023-08-29 14:53:51 -07:00
module	module/decompress: use vmalloc() for zstd decompression workspace	2023-08-29 09:39:08 -07:00
power	PM: hibernate: Fix copying the zero bitmap to safe pages	2023-10-04 20:43:44 +02:00
printk	Merge branch 'rework/misc-cleanups' into for-linus	2023-10-11 12:58:14 +02:00
rcu	TTY/Serial driver changes for 6.6-rc1	2023-09-01 09:38:00 -07:00
sched	cpufreq: schedutil: Update next_freq when cpufreq_limits change	2023-10-05 22:09:50 +02:00
time	posix-clock: introduce posix_clock_context concept	2023-10-15 20:07:52 +01:00
trace	bpf-next-for-netdev	2023-10-16 21:05:33 -07:00
.gitignore
acct.c	audit/stable-6.6 PR 20230829	2023-08-30 08:17:35 -07:00
async.c
audit.c	audit: move trailing statements to next line	2023-08-15 18:16:14 -04:00
audit.h	audit: correct audit_filter_inodes() definition	2023-07-21 12:17:25 -04:00
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c	audit: move trailing statements to next line	2023-08-15 18:16:14 -04:00
auditsc.c	Including fixes from netfilter and bpf.	2023-09-07 18:33:07 -07:00
backtracetest.c
bounds.c
capability.c	lsm: constify the 'target' parameter in security_capget()	2023-08-08 16:48:47 -04:00
cfi.c
compat.c
configs.c
context_tracking.c	locking/atomic: treewide: use raw_atomic*_<op>()	2023-06-05 09:57:20 +02:00
cpu.c	cpu/hotplug: Prevent self deadlock on CPU hot-unplug	2023-08-30 12:24:22 +02:00
cpu_pm.c
crash_core.c	Crash: add lock to serialize crash hotplug handling	2023-09-29 17:20:48 -07:00
crash_dump.c
cred.c	cred: convert printks to pr_<level>	2023-08-18 10:18:49 -07:00
delayacct.c	delayacct: track delays from IRQ/SOFTIRQ	2023-04-18 16:39:34 -07:00
dma.c
exec_domain.c
exit.c	fork, vhost: Use CLONE_THREAD to fix freezer/ps regression	2023-06-01 17:15:33 -04:00
extable.c
fail_function.c
fork.c	percpu: changes for v6.6	2023-09-01 15:44:45 -07:00
freezer.c
gen_kheaders.sh	Revert "kheaders: substituting --sort in archive creation"	2023-05-28 16:20:21 +09:00
groups.c
hung_task.c	kernel/hung_task.c: set some hung_task.c variables storage-class-specifier to static	2023-04-08 13:45:37 -07:00
iomem.c	kernel/iomem.c: remove __weak ioremap_cache helper	2023-08-21 13:37:28 -07:00
irq_work.c	trace: Add trace_ipi_send_cpu()	2023-03-24 11:01:29 +01:00
jump_label.c
kallsyms.c	kallsyms: Change func signature for cleanup_symbol_name()	2023-08-25 15:00:36 -07:00
kallsyms_internal.h
kallsyms_selftest.c	Modules changes for v6.6-rc1	2023-08-29 17:32:32 -07:00
kallsyms_selftest.h
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.kexec	crash: hotplug support for kexec_load()	2023-08-24 16:25:14 -07:00
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: add prototypes for helper functions	2023-06-09 17:44:17 -07:00
kexec.c	crash: hotplug support for kexec_load()	2023-08-24 16:25:14 -07:00
kexec_core.c	crash: add generic infrastructure for crash hotplug support	2023-08-24 16:25:13 -07:00
kexec_elf.c
kexec_file.c	integrity-v6.6	2023-08-30 09:16:56 -07:00
kexec_internal.h
kheaders.c	kheaders: Use array declaration instead of char	2023-03-24 20:10:59 -07:00
kprobes.c	kernel: kprobes: Use struct_size()	2023-08-23 09:38:17 +09:00
ksyms_common.c	kallsyms: make kallsyms_show_value() as generic function	2023-06-08 12:27:20 -07:00
ksysfs.c	crash: hotplug support for kexec_load()	2023-08-24 16:25:14 -07:00
kthread.c	kthread: unexport __kthread_should_park()	2023-08-18 10:18:59 -07:00
latencytop.c
Makefile	v6.5-rc1-modules-next	2023-06-28 15:51:08 -07:00
module_signature.c
notifier.c	notifiers: add tracepoints to the notifiers infrastructure	2023-04-08 13:45:38 -07:00
nsproxy.c	nsproxy: Convert nsproxy.count to refcount_t	2023-08-21 11:29:12 -07:00
padata.c
panic.c	panic: Reenable preemption in WARN slowpath	2023-09-15 11:28:08 +02:00
params.c	kernel: params: Remove unnecessary ‘0’ values from err	2023-07-10 12:47:01 -07:00
pid.c	pidfd: prevent a kernel-doc warning	2023-09-19 13:21:33 -07:00
pid_namespace.c	memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy	2023-08-21 13:37:59 -07:00
pid_sysctl.h	memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy	2023-08-21 13:37:59 -07:00
profile.c
ptrace.c	ptrace: Provide set/get interface for syscall user dispatch	2023-04-16 14:23:07 +02:00
range.c
reboot.c
regset.c
relay.c	kernel: relay: remove unnecessary NULL values from relay_open_buf	2023-08-18 10:18:55 -07:00
resource.c
resource_kunit.c
rseq.c
scftorture.c	scftorture: Pause testing after memory-allocation failure	2023-07-14 15:02:57 -07:00
scs.c
seccomp.c	seccomp: Add missing kerndoc notations	2023-08-17 12:32:15 -07:00
signal.c	signal: print comm and exe name on fatal signals	2023-08-18 10:18:50 -07:00
smp.c	smp: Reduce NMI traffic from CSD waiters to CSD destination	2023-07-10 14:19:04 -07:00
smpboot.c	cpu/hotplug: Remove unused state functions	2023-05-15 13:45:00 +02:00
smpboot.h
softirq.c	sched/core: introduce sched_core_idle_cpu()	2023-07-13 15:21:50 +02:00
stackleak.c	stackleak: allow to specify arch specific stackleak poison function	2023-04-20 11:36:35 +02:00
stacktrace.c
static_call.c
static_call_inline.c
stop_machine.c
sys.c	prctl: move PR_GET_AUXV out of PR_MCE_KILL	2023-07-17 12:53:21 -07:00
sys_ni.c	x86/shstk: Introduce map_shadow_stack syscall	2023-08-02 15:01:51 -07:00
sysctl-test.c
sysctl.c	v6.5-rc1-sysctl-next	2023-06-28 16:05:21 -07:00
task_work.c	task_work: add kerneldoc annotation for 'data' argument	2023-09-19 13:21:32 -07:00
taskstats.c
torture.c	torture: Stop right-shifting torture_random() return values	2023-08-14 15:01:08 -07:00
tracepoint.c
tsacct.c
ucount.c	sysctl: Add size to register_sysctl	2023-08-15 15:26:17 -07:00
uid16.c
uid16.h
umh.c	sysctl: fix unused proc_cap_handler() function warning	2023-06-29 15:19:43 -07:00
up.c
user-return-notifier.c
user.c
user_namespace.c
usermode_driver.c
utsname.c
utsname_sysctl.c	utsname: simplify one-level sysctl registration for uts_kern_table	2023-04-13 11:49:35 -07:00
vhost_task.c	vhost: Fix worker hangs due to missed wake up calls	2023-06-08 15:43:09 -04:00
watch_queue.c	watch_queue: prevent dangling pipe pointer	2023-06-06 10:47:04 +02:00
watchdog.c	watchdog/hardlockup: avoid large stack frames in watchdog_hardlockup_check()	2023-08-18 10:19:00 -07:00
watchdog_buddy.c	watchdog/hardlockup: move SMP barriers from common code to buddy code	2023-06-19 16:25:28 -07:00
watchdog_perf.c	watchdog/perf: add a weak function for an arch to detect if perf can use NMIs	2023-06-09 17:44:21 -07:00
workqueue.c	workqueue: Fix missed pwq_release_worker creation in wq_cpu_intensive_thresh_init()	2023-09-18 08:50:31 -10:00
workqueue_internal.h	workqueue: Drop the special locking rule for worker->flags and worker_pool->flags	2023-08-07 15:57:22 -10:00