Re: [syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbAllocBits

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On Wed, Mar 22, 2023 at 5:29 PM syzbot
<syzbot+b9ba793adebb63e56dba@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit fad376fce0af58deebc5075b8539dc05bf639af3
> Author: Liu Shixin via Jfs-discussion <jfs-discussion@xxxxxxxxxxxxxxxxxxxxx>
> 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=12d90bf6c80000
> start commit:   a6afa4199d3d Merge tag 'mailbox-v6.1' of git://git.linaro...
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d19f5d16783f901
> dashboard link: https://syzkaller.appspot.com/bug?extid=b9ba793adebb63e56dba
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1322ae34880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10403c94880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: fs/jfs: fix shift exponent db_agl2size negative
>


Looks reasonable.

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




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