linux-kernel - [PATCH] mm: slub: fix dereference invalid pointer in alloc_consistency

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Message-Id: <20250725024854.1201926-1-liqiong@nfschina.com>
Date: Fri, 25 Jul 2025 10:48:54 +0800
From: Li Qiong <liqiong@...china.com>
To: Christoph Lameter <cl@...two.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vlastimil Babka <vbabka@...e.cz>
Cc: Roman Gushchin <roman.gushchin@...ux.dev>,
	Harry Yoo <harry.yoo@...cle.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org,
	Li Qiong <liqiong@...china.com>
Subject: [PATCH] mm: slub: fix dereference invalid pointer in alloc_consistency_checks

In object_err(), need dereference the 'object' pointer, it may cause
a invalid pointer fault. Use slab_err() instead.

Signed-off-by: Li Qiong <liqiong@...china.com>
---
 mm/slub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slub.c b/mm/slub.c
index 31e11ef256f9..3a2e57e2e2d7 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1587,7 +1587,7 @@ static inline int alloc_consistency_checks(struct kmem_cache *s,
 		return 0;
 
 	if (!check_valid_pointer(s, slab, object)) {
-		object_err(s, slab, object, "Freelist Pointer check fails");
+		slab_err(s, slab, "Freelist Pointer (0x%p) check fails", object);
 		return 0;
 	}
 
-- 
2.30.2