linux-kernel - Re: [f2fs-dev] [PATCH v2] f2fs: fix to cover read extent cache access with lock

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Date: Wed, 12 Jun 2024 15:55:57 +0000
From: patchwork-bot+f2fs@...nel.org
To: Chao Yu <chao@...nel.org>
Cc: jaegeuk@...nel.org, linux-kernel@...r.kernel.org,
 syzbot+74ebe2104433e9dc610d@...kaller.appspotmail.com,
 linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: fix to cover read extent cache access
 with lock

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@...nel.org>:

On Fri, 31 May 2024 10:00:32 +0800 you wrote:
> syzbot reports a f2fs bug as below:
> 
> BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
> Read of size 4 at addr ffff8880739ab220 by task syz-executor200/5097
> 
> CPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
> Call Trace:
>  <TASK>
>  __dump_stack lib/dump_stack.c:88 [inline]
>  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
>  print_address_description mm/kasan/report.c:377 [inline]
>  print_report+0x169/0x550 mm/kasan/report.c:488
>  kasan_report+0x143/0x180 mm/kasan/report.c:601
>  sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
>  do_read_inode fs/f2fs/inode.c:509 [inline]
>  f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560
>  f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
>  generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
>  exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
>  exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
>  do_handle_to_path fs/fhandle.c:155 [inline]
>  handle_to_path fs/fhandle.c:210 [inline]
>  do_handle_open+0x495/0x650 fs/fhandle.c:226
>  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>  do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> 
> [...]

Here is the summary with links:
  - [f2fs-dev,v2] f2fs: fix to cover read extent cache access with lock
    https://git.kernel.org/jaegeuk/f2fs/c/d7409b05a64f

You are awesome, thank you!
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