linux-kernel - Re: [PATCH v3] f2fs: Add check for deleted inode

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Message-ID: <1d74a89c-c1b0-40a0-9f53-6b7682c527c9@kernel.org>
Date: Tue, 3 Dec 2024 19:31:28 +0800
From: Chao Yu <chao@...nel.org>
To: Leo Stone <leocstone@...il.com>, jaegeuk@...nel.org
Cc: Chao Yu <chao@...nel.org>, linux-f2fs-devel@...ts.sourceforge.net,
 linux-kernel@...r.kernel.org,
 syzbot+b01a36acd7007e273a83@...kaller.appspotmail.com
Subject: Re: [PATCH v3] f2fs: Add check for deleted inode

On 2024/12/3 1:12, Leo Stone wrote:
> The syzbot reproducer mounts a f2fs image, then tries to unlink an
> existing file. However, the unlinked file already has a link count of 0
> when it is read for the first time in do_read_inode().
> 
> Add a check to sanity_check_inode() for i_nlink == 0.
> 
> Reported-by: syzbot+b01a36acd7007e273a83@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=b01a36acd7007e273a83
> Fixes: 39a53e0ce0df ("f2fs: add superblock and major in-memory structure")
> Signed-off-by: Leo Stone <leocstone@...il.com>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,