linux-kernel - Re: [PATCH next] fs/9p: fix uaf in in v9fs_stat2inode

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Message-ID: <ZeXGZS1-X8_CYCUz@codewreck.org>
Date: Mon, 4 Mar 2024 22:02:29 +0900
From: asmadeus@...ewreck.org
To: ericvh@...nel.org
Cc: Lizhi Xu <lizhi.xu@...driver.com>,
	syzbot+7a3d75905ea1a830dbe5@...kaller.appspotmail.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux_oss@...debyte.com, lucho@...kov.net,
	syzkaller-bugs@...glegroups.com, v9fs@...ts.linux.dev
Subject: Re: [PATCH next] fs/9p: fix uaf in in v9fs_stat2inode_dotl

Lizhi Xu wrote on Fri, Feb 02, 2024 at 08:15:31PM +0800:
> The incorrect logical order of accessing the st object code in v9fs_fid_iget_dotl
> is causing this uaf.

Thanks for the fix!

Eric, this is also for your tree.

> 
> Fixes: 724a08450f74 ("fs/9p: simplify iget to remove unnecessary paths")

(careful if you rebase your tree as this commit isn't merged yet)

> Reported-and-tested-by: syzbot+7a3d75905ea1a830dbe5@...kaller.appspotmail.com
> Signed-off-by: Lizhi Xu <lizhi.xu@...driver.com>

Reviewed-by: Dominique Martinet <asmadeus@...ewreck.org>

-- 
Dominique Martinet | Asmadeus