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

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Date:   Sun, 26 Jan 2020 20:01:03 -0800
From:   syzbot <syzbot+f3e96783d74ee8ea9aa3@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, allison@...utok.net,
        aryabinin@...tuozzo.com, coreteam@...filter.org,
        davem@...emloft.net, elver@...gle.com, fw@...len.de,
        gregkh@...uxfoundation.org, info@...ux.net, jeremy@...zel.net,
        kadlec@...filter.org, kstewart@...uxfoundation.org,
        linux-kernel@...r.kernel.org, mark.rutland@....com,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, torvalds@...ux-foundation.org
Subject: Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add

syzbot has bisected this bug to:

commit 751ad98d5f881df91ba47e013b82422912381e8e
Author: Marco Elver <elver@...gle.com>
Date:   Fri Jul 12 03:54:00 2019 +0000

    asm-generic, x86: add bitops instrumentation for KASAN

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1287db66e00000
start commit:   244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=1187db66e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1687db66e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4
dashboard link: https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1104c495e00000

Reported-by: syzbot+f3e96783d74ee8ea9aa3@...kaller.appspotmail.com
Fixes: 751ad98d5f88 ("asm-generic, x86: add bitops instrumentation for KASAN")

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