linux-ext4 - Re: [syzbot] [ext4?] KASAN: out-of-bounds Read in ext4_ext_remove

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Message-ID: <000000000000690cfd06111b7ee6@google.com>
Date: Sun, 11 Feb 2024 05:54:02 -0800
From: syzbot <syzbot+6e5f2db05775244c73b7@...kaller.appspotmail.com>
To: achender@...ux.vnet.ibm.com, achender@...ibm.com, adilger.kernel@...ger.ca, 
	alex@...sterfs.com, axboe@...nel.dk, brauner@...nel.org, jack@...e.cz, 
	kernel@...labora.com, linux-ext4@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org, syzkaller-bugs@...glegroups.com, tytso@....edu, 
	usama.anjum@...labora.com
Subject: Re: [syzbot] [ext4?] KASAN: out-of-bounds Read in ext4_ext_remove_space

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=1764f648180000
start commit:   e6fda526d9db Merge tag 'arm64-fixes' of git://git.kernel.o..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=1e3d5175079af5a4
dashboard link: https://syzkaller.appspot.com/bug?extid=6e5f2db05775244c73b7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16a56679a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14d76b5da80000

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