linux-kernel - Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f

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Message-ID: <CAJfpegvsi9SaeVdykBFhhwoOrsNQzy3C8HcJjn16uHdkzZ-EVQ@mail.gmail.com>
Date: Mon, 7 Apr 2025 11:18:59 +0200
From: Miklos Szeredi <miklos@...redi.hu>
To: syzbot <syzbot+4036165fc595a74b09b2@...kaller.appspotmail.com>
Cc: adilger.kernel@...ger.ca, amir73il@...il.com, linux-ext4@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f_lock

On Mon, 7 Apr 2025 at 05:57, syzbot
<syzbot+4036165fc595a74b09b2@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    16cd1c265776 Merge tag 'timers-cleanups-2025-04-06' of git..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=12e7923f980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=c79406130aa88d22
> dashboard link: https://syzkaller.appspot.com/bug?extid=4036165fc595a74b09b2
> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14f9bd98580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1571c7e4580000


#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
v6.15-rc1

View attachment "ovl-dont-seek_cur-on-realfile.patch" of type "text/x-patch" (569 bytes)