ipc/sem: do not sleep with a spin lock held
authorMinghao Chi <chi.minghao@zte.com.cn>
Thu, 30 Dec 2021 09:29:18 +0000 (20:29 +1100)
committerStephen Rothwell <sfr@canb.auug.org.au>
Sun, 16 Jan 2022 07:39:40 +0000 (18:39 +1100)
commit80323cae5166048ce2bb532ffd7c88be86e13dfd
tree343efd8ed4eac888f1b4c73cd25b7f5948cb3bce
parent80ef7291da0e69a1e786605a99982f538a401c79
ipc/sem: do not sleep with a spin lock held

We can't call kvfree() with a spin lock held, so defer it.

Link: https://lkml.kernel.org/r/20211223031207.556189-1-chi.minghao@zte.com.cn
Fixes: fc37a3b8b438 ("[PATCH] ipc sem: use kvmalloc for sem_undo allocation")
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Yang Guang <cgel.zte@gmail.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Cc: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
ipc/sem.c