From: syzbot <syzbot+f61594de72d6705aea03@syzkaller.appspotmail.com>
To: hdanton@sina.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [bridge?] [netfilter?] KASAN: vmalloc-out-of-bounds Read in __ebt_unregister_table
Date: Sat, 18 Feb 2023 06:06:23 -0800 [thread overview]
Message-ID: <0000000000005ac21205f4f9ef6f@google.com> (raw)
In-Reply-To: <20230218135137.2025-1-hdanton@sina.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: vmalloc-out-of-bounds Read in __ebt_unregister_table
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in __ebt_unregister_table+0xf43/0xfc0 net/bridge/netfilter/ebtables.c:1178
Read of size 4 at addr ffffc90003263000 by task kworker/u4:6/3167
CPU: 0 PID: 3167 Comm: kworker/u4:6 Not tainted 6.2.0-rc8-syzkaller-00083-g3ac88fa4605e-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: netns cleanup_net
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
__ebt_unregister_table+0xf43/0xfc0 net/bridge/netfilter/ebtables.c:1178
ebt_unregister_table+0x35/0x40 net/bridge/netfilter/ebtables.c:1382
ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Memory state around the buggy address:
ffffc90003262f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90003262f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc90003263000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffc90003263080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90003263100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
Tested on:
commit: 3ac88fa4 Merge tag 'net-6.2-final' of git://git.kernel..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=12fc4f6f480000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe56f7d193926860
dashboard link: https://syzkaller.appspot.com/bug?extid=f61594de72d6705aea03
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch: https://syzkaller.appspot.com/x/patch.diff?x=173470f0c80000
next parent reply other threads:[~2023-02-18 14:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230218135137.2025-1-hdanton@sina.com>
2023-02-18 14:06 ` syzbot [this message]
[not found] <20230219024213.2103-1-hdanton@sina.com>
2023-02-19 2:57 ` [syzbot] [bridge?] [netfilter?] KASAN: vmalloc-out-of-bounds Read in __ebt_unregister_table syzbot
[not found] <20230219071501.2166-1-hdanton@sina.com>
2023-02-19 7:29 ` syzbot
[not found] <20230219114014.2224-1-hdanton@sina.com>
2023-02-19 11:46 ` syzbot
[not found] <20230220072531.2352-1-hdanton@sina.com>
2023-02-20 7:40 ` syzbot
2023-02-20 7:51 ` Dmitry Vyukov
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