linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: fix to avoid NULL pointer dereference in f2fs_issue

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Message-Id: <167276540205.24190.7786330518792341546.git-patchwork-notify@kernel.org>
Date:   Tue, 03 Jan 2023 17:03:22 +0000
From:   patchwork-bot+f2fs@...nel.org
To:     Chao Yu <chao@...nel.org>
Cc:     jaegeuk@...nel.org, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix to avoid NULL pointer dereference in
 f2fs_issue_flush()

Hello:

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

On Fri, 30 Dec 2022 23:43:32 +0800 you wrote:
> With below two cases, it will cause NULL pointer dereference when
> accessing SM_I(sbi)->fcc_info in f2fs_issue_flush().
> 
> a) If kthread_run() fails in f2fs_create_flush_cmd_control(), it will
> release SM_I(sbi)->fcc_info,
> 
> - mount -o noflush_merge /dev/vda /mnt/f2fs
> - mount -o remount,flush_merge /dev/vda /mnt/f2fs  -- kthread_run() fails
> - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=1 conv=fsync
> 
> [...]

Here is the summary with links:
  - [f2fs-dev] f2fs: fix to avoid NULL pointer dereference in f2fs_issue_flush()
    https://git.kernel.org/jaegeux/f2fs/c/b3d83066cbeb

You are awesome, thank you!
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