The patch titled
Subject: kasan: fix bad call to unpoison_slab_object
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
kasan-fix-bad-call-to-unpoison_slab_object.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-fix-bad-call-to-unpoison_slab_object.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Subject: kasan: fix bad call to unpoison_slab_object
Date: Fri, 14 Jun 2024 16:32:38 +0200
Commit 29d7355a9d05 ("kasan: save alloc stack traces for mempool") messed
up one of the calls to unpoison_slab_object: the last two arguments are
supposed to be GFP flags and whether to init the object memory.
Fix the call.
Without this fix, __kasan_mempool_unpoison_object provides the object's
size as GFP flags to unpoison_slab_object, which can cause LOCKDEP reports
(and probably other issues).
Link: https://lkml.kernel.org/r/20240614143238.60323-1-andrey.konovalov@xxxxxxxxx
Fixes: 29d7355a9d05 ("kasan: save alloc stack traces for mempool")
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Reported-by: Brad Spengler <spender@xxxxxxxxxxxxxx>
Acked-by: Marco Elver <elver@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/kasan/common.c~kasan-fix-bad-call-to-unpoison_slab_object
+++ a/mm/kasan/common.c
@@ -532,7 +532,7 @@ void __kasan_mempool_unpoison_object(voi
return;
/* Unpoison the object and save alloc info for non-kmalloc() allocations. */
- unpoison_slab_object(slab->slab_cache, ptr, size, flags);
+ unpoison_slab_object(slab->slab_cache, ptr, flags, false);
/* Poison the redzone and save alloc info for kmalloc() allocations. */
if (is_kmalloc_cache(slab->slab_cache))
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxx are
kasan-fix-bad-call-to-unpoison_slab_object.patch
