Re: [f2fs-dev] [PATCH v4 1/2] f2fs: avoid NULL checkpoint thread access in sysfs

Hello:

This series was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <[email protected]>:

On Tue,  4 Aug 2026 09:48:48 +0800 you wrote:
> checkpoint_merge can be enabled even when no checkpoint merge thread is
> running. A read-only mount is one case: f2fs does not start
> f2fs_issue_ckpt there, but ckpt_thread_ioprio is still writable through
> sysfs.
> 
> The ckpt_thread_ioprio store path updates the saved ioprio value and,
> when checkpoint_merge is enabled, calls set_task_ioprio() for the
> checkpoint thread. If cprc->f2fs_issue_ckpt is NULL, that dereferences a
> NULL task pointer.
> 
> [...]

Here is the summary with links:
  - [f2fs-dev,v4,1/2] f2fs: avoid NULL checkpoint thread access in sysfs
    https://git.kernel.org/jaegeuk/f2fs/c/5cb33b00c8fb
  - [f2fs-dev,v4,2/2] f2fs: protect critical_task_priority updates with s_umount
    https://git.kernel.org/jaegeuk/f2fs/c/8e4692c6c165

You are awesome, thank you!
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