Re: [syzbot] [xfs?] UBSAN: array-index-out-of-bounds in xfs_attr3_leaf_add_work

Kees Cook
2023-09-30T20:35:41Z

On Sat, Sep 30, 2023 at 10:57:28AM -0700, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
>
> commit a49bbce58ea90b14d4cb1d00681023a8606955f2
> Author: Darrick J. Wong <djwong@kernel.org>
> Date: Mon Jul 10 16:12:20 2023 +0000
>
> xfs: convert flex-array declarations in xfs attr leaf blocks
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12eef28a680000
> start commit: f8566aa4f176 Merge tag 'x86-urgent-2023-07-01' of git://gi..
> git tree: upstream
> kernel config: https://syzkaller.appspot.com/x/.config?x=3f27fb02fc20d955
> dashboard link: https://syzkaller.appspot.com/bug?extid=510dcbdc6befa1e6b2f6
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1652938f280000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c10c40a80000
>
> If the result looks correct, please mark the issue as fixed by replying with:

Yup, that tracks. :)

#syz fix: xfs: convert flex-array declarations in xfs attr leaf blocks

-Kees

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

--
Kees Cook