netdev - Re: KASAN: use-after-free Read in bitmap_ip

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Date:   Mon, 20 Jan 2020 20:41:01 -0800
From:   syzbot <syzbot+8b5f151de2f35100bbc5@...kaller.appspotmail.com>
To:     a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org,
        coreteam@...filter.org, davem@...emloft.net,
        florent.fourcot@...irst.fr, fw@...len.de, jeremy@...zel.net,
        johannes.berg@...el.com, kadlec@...filter.org,
        linux-kernel@...r.kernel.org, lipeng321@...wei.com,
        mareklindner@...mailbox.ch, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        sw@...onwunderlich.de, syzkaller-bugs@...glegroups.com,
        tanhuazhong@...wei.com
Subject: Re: KASAN: use-after-free Read in bitmap_ip_destroy

syzbot has bisected this bug to:

commit 354d0fab649d47045517cf7cae03d653a4dcb3b8
Author: Peng Li <lipeng321@...wei.com>
Date:   Thu Jul 4 14:04:26 2019 +0000

    net: hns3: add default value for tc_size and tc_offset

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15cc0685e00000
start commit:   8f8972a3 Merge tag 'mtd/fixes-for-5.5-rc7' of git://git.ke..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17cc0685e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=13cc0685e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cfbb8fa33f49f9f3
dashboard link: https://syzkaller.appspot.com/bug?extid=8b5f151de2f35100bbc5
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12e22559e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16056faee00000

Reported-by: syzbot+8b5f151de2f35100bbc5@...kaller.appspotmail.com
Fixes: 354d0fab649d ("net: hns3: add default value for tc_size and tc_offset")

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