linux-kernel - Re: KASAN: stack-out-of-bounds Write in end_buffer_read

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Message-ID: <ZsNG-teuPe8Tch25@casper.infradead.org>
Date: Mon, 19 Aug 2024 14:22:02 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Hui Guo <guohui.study@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Potapenko <glider@...gle.com>,
	Marco Elver <elver@...gle.com>, linux-kernel@...r.kernel.org,
	Mark Rutland <mark.rutland@....com>, Ingo Molnar <mingo@...nel.org>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Uros Bizjak <ubizjak@...il.com>,
	Carlos Llamas <cmllamas@...gle.com>, Jens Axboe <axboe@...nel.dk>,
	Pankaj Raghav <p.raghav@...sung.com>,
	Ryusuke Konishi <konishi.ryusuke@...il.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	linux-fsdevel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: stack-out-of-bounds Write in end_buffer_read_sync

On Mon, Aug 19, 2024 at 08:50:48PM +0800, Hui Guo wrote:
> Hi Kernel Maintainers,
> Our tool found the following kernel bug "KASAN: stack-out-of-bounds
> Write in end_buffer_read_sync" on:
> HEAD Commit: 6b0f8db921abf0520081d779876d3a41069dab95 Merge tag
> 'execve-v6.11-rc4' of
> git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
> kernel config: https://github.com/androidAppGuard/KernelBugs/blob/main/6b0f8db921abf0520081d779876d3a41069dab95/.config
> repro log: https://github.com/androidAppGuard/KernelBugs/blob/main/6b0f8db921abf0520081d779876d3a41069dab95/d41d191102504ccfea2e8408a29f03973e4ccc81/repro.log
> syz repro: https://github.com/androidAppGuard/KernelBugs/blob/main/6b0f8db921abf0520081d779876d3a41069dab95/d41d191102504ccfea2e8408a29f03973e4ccc81/repro.prog
> 
> Please let me know if there is anything I can help.

You could bisect it to the commit that introduced the problem