Chengfeng Ye 6feb37b3b0 sctp: fix potential deadlock on &net->sctp.addr_wq_lock ... As &net->sctp.addr_wq_lock is also acquired by the timer sctp_addr_wq_timeout_handler() in protocal.c, the same lock acquisition at sctp_auto_asconf_init() seems should disable irq since it is called from sctp_accept() under process context. Possible deadlock scenario: sctp_accept() -> sctp_sock_migrate() -> sctp_auto_asconf_init() -> spin_lock(&net->sctp.addr_wq_lock) <timer interrupt> -> sctp_addr_wq_timeout_handler() -> spin_lock_bh(&net->sctp.addr_wq_lock); (deadlock here) This flaw was found using an experimental static analysis tool we are developing for irq-related deadlock. The tentative patch fix the potential deadlock by spin_lock_bh(). Signed-off-by: Chengfeng Ye <dg573847474@gmail.com> Fixes: 34e5b01186 ("sctp: delay auto_asconf init until binding the first addr") Acked-by: Xin Long <lucien.xin@gmail.com> Link: https://lore.kernel.org/r/20230627120340.19432-1-dg573847474@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>		2023-06-29 11:49:42 +02:00
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associola.c
auth.c
bind_addr.c
chunk.c
debug.c
diag.c
endpointola.c
input.c
inqueue.c
ipv6.c
Kconfig
Makefile
objcnt.c
offload.c	net: move gso declarations and functions to their own files	2023-06-10 00:11:41 -07:00
output.c
outqueue.c
primitive.c
proc.c
protocol.c	sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)	2023-06-24 15:50:13 -07:00
sm_make_chunk.c
sm_sideeffect.c	sctp: handle invalid error codes without calling BUG()	2023-06-12 09:36:27 +01:00
sm_statefuns.c	sctp: fix an error code in sctp_sf_eat_auth()	2023-06-12 09:36:27 +01:00
sm_statetable.c
socket.c	sctp: fix potential deadlock on &net->sctp.addr_wq_lock	2023-06-29 11:49:42 +02:00
stream.c
stream_interleave.c
stream_sched.c
stream_sched_fc.c
stream_sched_prio.c
stream_sched_rr.c
sysctl.c
transport.c
tsnmap.c
ulpevent.c
ulpqueue.c