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Thu, 6 Nov 2025 03:50:39 -0500 (EST) Date: Thu, 6 Nov 2025 17:50:35 +0900 From: Greg KH To: =?utf-8?B?56ug5oC/6LS6?= <12421252@zju.edu.cn> Cc: security@kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Re: [SECURITY] ext4: KASAN use-after-free and Oops in ext4_xattr_set_entry with crafted ext4 image Message-ID: <2025110602-display-remodeler-80f0@gregkh> References: <2025110632-fondue-chewer-2e20@gregkh> <58255d5d.20a1f.19a585765c9.Coremail.12421252@zju.edu.cn> Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <58255d5d.20a1f.19a585765c9.Coremail.12421252@zju.edu.cn> On Thu, Nov 06, 2025 at 04:45:14PM +0800, 章怿贺 wrote: > Hi Greg, > > Thank you for your explanation and suggestions. Please always cc: everyone on the emails, direct emails don't scale :) > I ran e2fsck -fn on the extracted image and it does report errors > (including “padding at end of block bitmap is not set”), so it seems > fsck already detects the corruption. Next time I will evaluate the > impact more carefully before contacting the Linux community again. That's great to hear, but I'm sure the ext4 developers would still appreciate a kernel patch for this if you have one :) thanks, greg k-h