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

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Message-ID: <000000000000b207e60596c1d413@google.com>
Date:   Thu, 07 Nov 2019 05:42:04 -0800
From:   syzbot <syzbot+a88c8270030dc5d71e4f@...kaller.appspotmail.com>
To:     aivazian.tigran@...il.com, akpm@...ux-foundation.org,
        dmitri.vorobiev@...il.com, gregkh@...uxfoundation.org,
        kstewart@...uxfoundation.org, linux-kernel@...r.kernel.org,
        pombredanne@...b.com, snakebyte@....de,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        tigran@...azian.fsnet.co.uk, torvalds@...ux-foundation.org,
        viro@...iv.linux.org.uk
Subject: Re: KASAN: slab-out-of-bounds Read in find_first_zero_bit

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