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(parent: 27d676a) | patch
ipc/msg.c: fix percpu_counter use after free
authorAndrew Morton <akpm@linux-foundation.org>
Fri, 21 Oct 2022 04:19:22 +0000 (21:19 -0700)
committerAndrew Morton <akpm@linux-foundation.org>
Fri, 28 Oct 2022 20:37:22 +0000 (13:37 -0700)
commit64b4c411a6c7a5f27555bfc2d6310b87bde3db67
tree878e60cfde45dea3ee6379d66b5a55c934947e24tree | snapshot
parent27d676a1c2010450d00d514a8a6c1c780cb8d77fcommit | diff
ipc/msg.c: fix percpu_counter use after free

These percpu counters are referenced in free_ipcs->freeque, so destroy
them later.

Fixes: 72d1e611082e ("ipc/msg: mitigate the lock contention with percpu counter")
Reported-by: syzbot+96e659d35b9d6b541152@syzkaller.appspotmail.com
Tested-by: Mark Rutland <mark.rutland@arm.com>
Cc: Jiebin Sun <jiebin.sun@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
ipc/msg.c diff | blob | history
Domain: System / Kernel;