vfree: add debug might_sleep()

Add might_sleep() call to vfree() to catch potential sleep-in-atomic bugs earlier. [[email protected]: drop might_sleep_if() from kvfree()] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andrey Ryabinin <[email protected]> Reviewed-by: Andrew Morton <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Oct 26, 2018 · a8dda16 · a8dda16
1 parent 3ca4ea3
commit a8dda16
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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()))