linux-kernel - Re: [syzbot] [reiserfs?] KASAN: null-ptr-deref Read in do_journal

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Date: Thu, 22 Feb 2024 08:41:02 -0800
From: syzbot <syzbot+845cd8e5c47f2a125683@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, axboe@...nel.dk, brauner@...nel.org, 
	bvanassche@....org, damien.lemoal@...nsource.wdc.com, ghandatmanas@...il.com, 
	jack@...e.cz, jlayton@...nel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, neilb@...e.de, reiserfs-devel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, syzkaller@...glegroups.com, 
	willy@...radead.org, yi.zhang@...wei.com
Subject: Re: [syzbot] [reiserfs?] KASAN: null-ptr-deref Read in do_journal_end (2)

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=10f6c4b4180000
start commit:   69b41ac87e4a Merge tag 'for-6.2-rc2-tag' of git://git.kern..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=9babfdc3dd4772d0
dashboard link: https://syzkaller.appspot.com/bug?extid=845cd8e5c47f2a125683
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14f68684480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=142a1eaa480000

If the result looks correct, please mark the issue as fixed by replying with:

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

For information about bisection process see: https://goo.gl/tpsmEJ#bisection