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From: patchwork-bot+f2fs@kernel.org
To: George Saad <geoo115@gmail.com>
Cc: gregkh@linuxfoundation.org, jaegeuk@kernel.org,
	stable@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH v4] f2fs: fix use-after-free of sbi in f2fs_compress_write_end_io()
Date: Tue, 24 Mar 2026 17:32:14 +0000	[thread overview]
Message-ID: <177437353403.1223048.17520829968628791815.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260323112123.786090-1-geoo115@gmail.com>

Hello:

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

On Mon, 23 Mar 2026 11:21:23 +0000 you wrote:
> In f2fs_compress_write_end_io(), dec_page_count(sbi, type) can bring
> the F2FS_WB_CP_DATA counter to zero, unblocking
> f2fs_wait_on_all_pages() in f2fs_put_super() on a concurrent unmount
> CPU. The unmount path then proceeds to call
> f2fs_destroy_page_array_cache(sbi), which destroys
> sbi->page_array_slab via kmem_cache_destroy(), and eventually
> kfree(sbi). Meanwhile, the bio completion callback is still executing:
> when it reaches page_array_free(sbi, ...), it dereferences
> sbi->page_array_slab — a destroyed slab cache — to call
> kmem_cache_free(), causing a use-after-free.
> 
> [...]

Here is the summary with links:
  - [f2fs-dev,v4] f2fs: fix use-after-free of sbi in f2fs_compress_write_end_io()
    https://git.kernel.org/jaegeuk/f2fs/c/39d4ee19c1e7

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html



      parent reply	other threads:[~2026-03-24 17:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <2026032354-country-saddlebag-5331@gregkh>
2026-03-23 10:44 ` [PATCH v3] f2fs: fix use-after-free of sbi in f2fs_compress_write_end_io() George Saad
2026-03-23 11:06   ` [f2fs-dev] " Chao Yu
2026-03-23 11:21 ` [PATCH v4] " George Saad
2026-03-23 11:30   ` Chao Yu
2026-03-24 17:32   ` patchwork-bot+f2fs [this message]

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