linux-ext4 - Re: [syzbot] [ext4?] KASAN: use-after-free Read in ext4_find

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Message-ID: <00000000000064064a060fe9b55a@google.com>
Date: Sat, 27 Jan 2024 01:05:05 -0800
From: syzbot <syzbot+7ec4ebe875a7076ebb31@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, axboe@...nel.dk, brauner@...nel.org, 
	jack@...e.cz, linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: [syzbot] [ext4?] KASAN: use-after-free Read in ext4_find_extent (3)

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=17b36eefe80000
start commit:   c42d9eeef8e5 Merge tag 'hardening-v6.7-rc2' of git://git.k..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=d05dd66e2eb2c872
dashboard link: https://syzkaller.appspot.com/bug?extid=7ec4ebe875a7076ebb31
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1585ea50e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=157ef53f680000

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