ipc/sem: do not sleep with a spin lock held

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/[email protected]
Fixes: fc37a3b8b438 ("[PATCH] ipc sem: use kvmalloc for sem_undo allocation")
Reported-by: Zeal Robot <[email protected]>
Signed-off-by: Minghao Chi <[email protected]>
Reviewed-by: Shakeel Butt <[email protected]>
Reviewed-by: Manfred Spraul <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Yang Guang <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Bhaskar Chowdhury <[email protected]>
Cc: Vasily Averin <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>