linux-kernel - [PATCH] mm/slub: return 0 when object pointer is NULL

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Message-Id: <1662962379-16174-1-git-send-email-luoben@linux.alibaba.com>
Date:   Mon, 12 Sep 2022 13:59:39 +0800
From:   Ben Luo <luoben@...ux.alibaba.com>
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org, vbabka@...e.cz,
        roman.gushchin@...ux.dev, 42.hyeyoo@...il.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     luoben@...ux.alibaba.com
Subject: [PATCH] mm/slub: return 0 when object pointer is NULL

NULL is definitly not a valid address

Signed-off-by: Ben Luo <luoben@...ux.alibaba.com>
---
 mm/slub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slub.c b/mm/slub.c
index 862dbd9..50fad18 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -674,7 +674,7 @@ static inline int check_valid_pointer(struct kmem_cache *s,
 	void *base;
 
 	if (!object)
-		return 1;
+		return 0;
 
 	base = slab_address(slab);
 	object = kasan_reset_tag(object);
-- 
1.8.3.1