linux-kernel - Re: KASAN: slab-out-of-bounds Read in find_first_zero

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Date:   Thu, 7 Nov 2019 19:14:12 +0000
From:   Tigran Aivazian <aivazian.tigran@...il.com>
To:     syzbot <syzbot+a88c8270030dc5d71e4f@...kaller.appspotmail.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Dmitri Vorobiev <dmitri.vorobiev@...il.com>,
        gregkh@...uxfoundation.org, kstewart@...uxfoundation.org,
        LKML <linux-kernel@...r.kernel.org>, pombredanne@...b.com,
        Eric Sesterhenn <snakebyte@....de>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        torvalds@...ux-foundation.org, Al Viro <viro@...iv.linux.org.uk>
Subject: Re: KASAN: slab-out-of-bounds Read in find_first_zero_bit

#syz fix: bfs: extra sanity checking and static inode bitmap

On Thu, 7 Nov 2019 at 13:42, syzbot
<syzbot+a88c8270030dc5d71e4f@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this bug was fixed by commit:
>
> commit d1877155891020cb26ad4fba45bfee52d8da9951
> Author: Tigran Aivazian <aivazian.tigran@...il.com>
> Date:   Thu Jan 3 23:28:14 2019 +0000
>
>      bfs: extra sanity checking and static inode bitmap
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16634ee8600000
> start commit:   b5dbc287 Merge tag 'kbuild-fixes-v4.16-3' of git://git.ker..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d9b0d91297e224bc
> dashboard link: https://syzkaller.appspot.com/bug?extid=a88c8270030dc5d71e4f
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16cf65d3800000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16d99ab3800000
>
> If the result looks correct, please mark the bug fixed by replying with:
>
> #syz fix: bfs: extra sanity checking and static inode bitmap
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection