linux-kernel - [PATCH] mm, slub: fix uninitialized variable in __slab

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 16 Dec 2022 03:31:19 +0000
From:   Chen Jun <chenjun102@...wei.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:     <xuqiang36@...wei.com>
Subject: [PATCH] mm, slub: fix uninitialized variable in __slab_free

new.frozen is not initialized before it is used.

Fixes: 2cfb7455d223 ("slub: Rework allocator fastpaths")
Signed-off-by: Chen Jun <chenjun102@...wei.com>
---
 mm/slub.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/slub.c b/mm/slub.c
index 13459c69095a..8628c88875b6 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3593,6 +3593,7 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab,
 		return;
 	}
 
+	new.frozen = 0;
 	do {
 		if (unlikely(n)) {
 			spin_unlock_irqrestore(&n->list_lock, flags);
-- 
2.17.1