BackPup/Linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-25 21:21:09 -04:00
Code Issues Packages Projects Releases Wiki Activity

kasan: memset free track in qlink_free

Browse Source 
Instead of only zeroing out the stack depot handle when evicting the
free stack trace in qlink_free, zero out the whole track.

Do this just to produce a similar effect for alloc and free meta. The
other fields of the free track besides the stack trace handle are
considered invalid at this point anyway, so no harm in zeroing them out.

Link: https://lkml.kernel.org/r/db987c1cd011547e85353b0b9997de190c97e3e6.1703020707.git.andreyknvl@google.com
Fixes: 773688a6cb ("kasan: use stack_depot_put for Generic mode")
Signed-off-by: Andrey Konovalov <[email protected]>
Reviewed-by: Marco Elver <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Evgenii Stepanov <[email protected]>
Cc: Tetsuo Handa <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
This commit is contained in:
Andrey Konovalov
2023-12-29 11:58:42 -08:00
committed by Andrew Morton
parent a414d4286f
commit 08d7c94d96
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mm/kasan/quarantine.c
+1 -1
View File
@@ -157,7 +157,7 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache)
if (free_meta &&
*(u8 *)kasan_mem_to_shadow(object) == KASAN_SLAB_FREETRACK) {
stack_depot_put(free_meta->free_track.stack);
free_meta->free_track.stack = 0;
__memset(&free_meta->free_track, 0, sizeof(free_meta->free_track));
}
/*