linux-kernel - Re: [syzbot] [mm] [fs] possible deadlock in page_cache_ra

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Message-ID: <y5kibif4m6shs4c44o6c46mhi6mengffft2rfnnjk4djtxiqbb@bxbhd6rx6uof>
Date: Fri, 21 Feb 2025 15:56:32 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+47c7e14e1bd09234d0ad@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, axboe@...nel.dk, brauner@...nel.org, 
	jack@...e.cz, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, reiserfs-devel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	willy@...radead.org
Subject: Re: [syzbot] [mm] [fs] possible deadlock in page_cache_ra_unbounded

On Thu 20-02-25 08:20:02, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 6f861765464f43a71462d52026fbddfc858239a5
> Author: Jan Kara <jack@...e.cz>
> Date:   Wed Nov 1 17:43:10 2023 +0000
> 
>     fs: Block writes to mounted block devices
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16e867f8580000
> start commit:   861deac3b092 Linux 6.7-rc7
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e1e118a9228c45d7
> dashboard link: https://syzkaller.appspot.com/bug?extid=47c7e14e1bd09234d0ad
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=100b9595e80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1415ff9ee80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

Makes sense:
 
#syz fix: fs: Block writes to mounted block devices

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR