linux-kernel - Re: [PATCH v3] ext4: fix race condition between ext4_write and ext4_convert_inline

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Message-Id: <165292370259.1197022.17166433087491869557.b4-ty@mit.edu>
Date:   Wed, 18 May 2022 21:29:04 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Baokun Li <libaokun1@...wei.com>, linux-ext4@...r.kernel.org
Cc:     "Theodore Ts'o" <tytso@....edu>, yebin10@...wei.com,
        yukuai3@...wei.com, yi.zhang@...wei.com, jack@...e.cz,
        adilger.kernel@...ger.ca, Hulk Robot <hulkci@...wei.com>,
        stable@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] ext4: fix race condition between ext4_write and ext4_convert_inline_data

On Thu, 28 Apr 2022 21:40:31 +0800, Baokun Li wrote:
> Hulk Robot reported a BUG_ON:
>  ==================================================================
>  EXT4-fs error (device loop3): ext4_mb_generate_buddy:805: group 0,
>  block bitmap and bg descriptor inconsistent: 25 vs 31513 free clusters
>  kernel BUG at fs/ext4/ext4_jbd2.c:53!
>  invalid opcode: 0000 [#1] SMP KASAN PTI
>  CPU: 0 PID: 25371 Comm: syz-executor.3 Not tainted 5.10.0+ #1
>  RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
>  RIP: 0010:__ext4_journal_stop+0x10e/0x110 fs/ext4/ext4_jbd2.c:116
>  [...]
>  Call Trace:
>   ext4_write_inline_data_end+0x59a/0x730 fs/ext4/inline.c:795
>   generic_perform_write+0x279/0x3c0 mm/filemap.c:3344
>   ext4_buffered_write_iter+0x2e3/0x3d0 fs/ext4/file.c:270
>   ext4_file_write_iter+0x30a/0x11c0 fs/ext4/file.c:520
>   do_iter_readv_writev+0x339/0x3c0 fs/read_write.c:732
>   do_iter_write+0x107/0x430 fs/read_write.c:861
>   vfs_writev fs/read_write.c:934 [inline]
>   do_pwritev+0x1e5/0x380 fs/read_write.c:1031
>  [...]
>  ==================================================================
> 
> [...]

Applied, thanks!

[1/1] ext4: fix race condition between ext4_write and ext4_convert_inline_data
      commit: f87c7a4b084afc13190cbb263538e444cb2b392a

Best regards,
-- 
Theodore Ts'o <tytso@....edu>