linux-kernel - Re: [f2fs-dev] [PATCH 1/2] f2fs: fix to avoid NULL pointer dereference in f2fs_check_quota

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Message-Id: 
 <175684441250.425353.3302301690844852179.git-patchwork-notify@kernel.org>
Date: Tue, 02 Sep 2025 20:20:12 +0000
From: patchwork-bot+f2fs@...nel.org
To: Chao Yu <chao@...nel.org>
Cc: jaegeuk@...nel.org, syzbot+d371efea57d5aeab877b@...kaller.appspotmail.com,
 lihongbo22@...wei.com, linux-kernel@...r.kernel.org,
 linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 1/2] f2fs: fix to avoid NULL pointer
 dereference
 in f2fs_check_quota_consistency()

Hello:

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

On Mon, 18 Aug 2025 10:09:38 +0800 you wrote:
> syzbot reported a f2fs bug as below:
> 
> Oops: gen[  107.736417][ T5848] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> CPU: 1 UID: 0 PID: 5848 Comm: syz-executor263 Tainted: G        W           6.17.0-rc1-syzkaller-00014-g0e39a731820a #0 PREEMPT_{RT,(full)}
> RIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284
> Call Trace:
>  <TASK>
>  f2fs_check_quota_consistency fs/f2fs/super.c:1188 [inline]
>  f2fs_check_opt_consistency+0x1378/0x2c10 fs/f2fs/super.c:1436
>  __f2fs_remount fs/f2fs/super.c:2653 [inline]
>  f2fs_reconfigure+0x482/0x1770 fs/f2fs/super.c:5297
>  reconfigure_super+0x224/0x890 fs/super.c:1077
>  do_remount fs/namespace.c:3314 [inline]
>  path_mount+0xd18/0xfe0 fs/namespace.c:4112
>  do_mount fs/namespace.c:4133 [inline]
>  __do_sys_mount fs/namespace.c:4344 [inline]
>  __se_sys_mount+0x317/0x410 fs/namespace.c:4321
>  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
>  do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> 
> [...]

Here is the summary with links:
  - [f2fs-dev,1/2] f2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()
    https://git.kernel.org/jaegeuk/f2fs/c/930a9a6ee8e7
  - [f2fs-dev,2/2] f2fs: fix to allow removing qf_name
    https://git.kernel.org/jaegeuk/f2fs/c/ff11d8701b77

You are awesome, thank you!
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