linux-ext4 - Re: [PATCH] ext4: fix use-after-free in ext4_orphan

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Message-Id: <167036049593.156498.14515627082959738584.b4-ty@mit.edu>
Date:   Tue,  6 Dec 2022 16:01:49 -0500
From:   "Theodore Ts'o" <tytso@....edu>
To:     Baokun Li <libaokun1@...wei.com>, linux-ext4@...r.kernel.org
Cc:     "Theodore Ts'o" <tytso@....edu>, linux-kernel@...r.kernel.org,
        ritesh.list@...il.com, yi.zhang@...wei.com,
        adilger.kernel@...ger.ca, yukuai3@...wei.com, jack@...e.cz
Subject: Re: [PATCH] ext4: fix use-after-free in ext4_orphan_cleanup

On Wed, 2 Nov 2022 16:06:33 +0800, Baokun Li wrote:
> I caught a issue as follows:
> ==================================================================
>  BUG: KASAN: use-after-free in __list_add_valid+0x28/0x1a0
>  Read of size 8 at addr ffff88814b13f378 by task mount/710
> 
>  CPU: 1 PID: 710 Comm: mount Not tainted 6.1.0-rc3-next #370
>  Call Trace:
>   <TASK>
>   dump_stack_lvl+0x73/0x9f
>   print_report+0x25d/0x759
>   kasan_report+0xc0/0x120
>   __asan_load8+0x99/0x140
>   __list_add_valid+0x28/0x1a0
>   ext4_orphan_cleanup+0x564/0x9d0 [ext4]
>   __ext4_fill_super+0x48e2/0x5300 [ext4]
>   ext4_fill_super+0x19f/0x3a0 [ext4]
>   get_tree_bdev+0x27b/0x450
>   ext4_get_tree+0x19/0x30 [ext4]
>   vfs_get_tree+0x49/0x150
>   path_mount+0xaae/0x1350
>   do_mount+0xe2/0x110
>   __x64_sys_mount+0xf0/0x190
>   do_syscall_64+0x35/0x80
>   entry_SYSCALL_64_after_hwframe+0x63/0xcd
>   </TASK>
>  [...]
> ==================================================================
> 
> [...]

Applied, thanks!

[1/1] ext4: fix use-after-free in ext4_orphan_cleanup
      commit: ad7ab3c3f740ce379e230d28c6aa8f9550182841

Best regards,
-- 
Theodore Ts'o <tytso@....edu>