From: Andrey Ryabinin Date: Fri, 26 Oct 2018 22:07:07 +0000 (-0700) Subject: vfree: add debug might_sleep() X-Git-Tag: v4.20-rc1~92^2~59 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a8dda165ec34fac2b4119654330150e2c896e531;p=thirdparty%2Fkernel%2Flinux.git vfree: add debug might_sleep() Add might_sleep() call to vfree() to catch potential sleep-in-atomic bugs earlier. [aryabinin@virtuozzo.com: drop might_sleep_if() from kvfree()] Link: http://lkml.kernel.org/r/7e19e4df-b1a6-29bd-9ae7-0266d50bef1d@virtuozzo.com Link: http://lkml.kernel.org/r/20180914130512.10394-3-aryabinin@virtuozzo.com Signed-off-by: Andrey Ryabinin Reviewed-by: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/vmalloc.c b/mm/vmalloc.c index d00d42d6bf79f..97d4b25d03731 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1587,6 +1587,8 @@ void vfree(const void *addr) kmemleak_free(addr); + might_sleep_if(!in_interrupt()); + if (!addr) return; if (unlikely(in_interrupt()))