Re: [PATCH] cifs: fix use-after-free on the link name

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To: Steve French <smfrench@xxxxxxxxx>
Subject: Re: [PATCH] cifs: fix use-after-free on the link name
From: ChenXiaoSong <chenxiaosong2@xxxxxxxxxx>
Date: Thu, 3 Nov 2022 09:53:30 +0800
Cc: <linux-cifs@xxxxxxxxxxxxxxx>, <samba-technical@xxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <yi.zhang@xxxxxxxxxx>, <zhangxiaoxu5@xxxxxxxxxx>, <sfrench@xxxxxxxxx>, <pc@xxxxxx>, <lsahlber@xxxxxxxxxx>
In-reply-to: <CAH2r5mv0wahqYWOXiSdxDiUB4BTq=yRxYF8R8w_0=aJ_2-B8Zg@mail.gmail.com>
References: <20221102061659.920334-1-chenxiaosong2@huawei.com> <CAH2r5mv0wahqYWOXiSdxDiUB4BTq=yRxYF8R8w_0=aJ_2-B8Zg@mail.gmail.com>
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1

xfstests generic/011 can reproduce this bug in about 10+ minutes, enableCONFIG_KASAN=y, my mount option is: -o mfsymlinks,vers=3.0 -ocontext=system_u:object_r:unlabeled_t:s0


在 2022/11/3 8:59, Steve French 写道:

Looks promising. How common was the xfstest failure in your setup?

References:
- [PATCH] cifs: fix use-after-free on the link name
  - From: ChenXiaoSong

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