Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 39a349f5 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
Browse files

Merge "mm: slub: Panic instead of restoring corrupted bytes"

parents 3ab53e06 ffc273b0

Documentation/vm/slub.txt

+4 −0
Original line number Diff line number Diff line
@@ -252,6 +252,10 @@ After reporting the details of the issue encountered the FIX SLUB message 
tells us that SLUB has restored the Redzone to its proper value and then

system operations continue.



If it is required to only report the details of the issue and panic immediately

after in order to possibly catch any scribblers one can set the

CONFIG_DEBUG_SLUB_PANIC_ON option.



Emergency operations:

---------------------

mm/slub.c

+4 −0
Original line number Diff line number Diff line
@@ -649,8 +649,12 @@ static void init_object(struct kmem_cache *s, void *object, u8 val) 
static void restore_bytes(struct kmem_cache *s, char *message, u8 data,

						void *from, void *to)

{

#ifdef CONFIG_SLUB_DEBUG_PANIC_ON

	panic("Found corruption 0x%p-0x%p=0x%x\n", from, to - 1, data);

#else

	slab_fix(s, "Restoring 0x%p-0x%p=0x%x\n", from, to - 1, data);

	memset(from, data, to - from);

#endif

}



static int check_bytes_and_report(struct kmem_cache *s, struct page *page,