linux-kernel - Re: [syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbMount

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Date:   Fri, 17 Mar 2023 19:27:19 -0700
From:   syzbot <syzbot+0835e526215d5dcefaa9@...kaller.appspotmail.com>
To:     dave.kleikamp@...cle.com, jfs-discussion@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        liushixin2@...wei.com, mudongliangabcd@...il.com,
        paskripkin@...il.com, r33s3n6@...il.com, shaggy@...nel.org,
        syzkaller-bugs@...glegroups.com, wuhoipok@...il.com
Subject: Re: [syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbMount

syzbot suspects this issue was fixed by commit:

commit fad376fce0af58deebc5075b8539dc05bf639af3
Author: Liu Shixin via Jfs-discussion <jfs-discussion@...ts.sourceforge.net>
Date:   Thu Nov 3 03:01:59 2022 +0000

    fs/jfs: fix shift exponent db_agl2size negative

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10f3046ec80000
start commit:   513c1a3d3f19 Merge tag 'trace-v6.2-rc6' of git://git.kerne..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=6bb1911ff9919df0
dashboard link: https://syzkaller.appspot.com/bug?extid=0835e526215d5dcefaa9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16d599df480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16bb69a7480000

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

#syz fix: fs/jfs: fix shift exponent db_agl2size negative

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