netdev - Re: KASAN: use-after-free Read in ccid2_hc_tx_packet

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Message-ID: <0000000000007825cd05986598e6@google.com>
Date:   Thu, 28 Nov 2019 02:30:00 -0800
From:   syzbot <syzbot+554ccde221001ab5479a@...kaller.appspotmail.com>
To:     alexey.kodanev@...cle.com, coreteam@...filter.org,
        davem@...emloft.net, dccp@...r.kernel.org, dsahern@...il.com,
        edumazet@...gle.com, fw@...len.de, gerrit@....abdn.ac.uk,
        kadlec@...ckhole.kfki.hu, keescook@...omium.org,
        kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, soheil@...gle.com,
        syzkaller-bugs@...glegroups.com, yoshfuji@...ux-ipv6.org
Subject: Re: KASAN: use-after-free Read in ccid2_hc_tx_packet_recv

syzbot has bisected this bug to:

commit 3fa6f616a7a4d0bdf4d877d530456d8a5c3b109b
Author: David Ahern <dsahern@...il.com>
Date:   Mon Aug 7 15:44:17 2017 +0000

     net: ipv4: add second dif to inet socket lookups

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=141e882ae00000
start commit:   b5069438 Merge branch 'stable/for-linus-4.17' of git://git..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=161e882ae00000
console output: https://syzkaller.appspot.com/x/log.txt?x=121e882ae00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=982e2df1b9e60b02
dashboard link: https://syzkaller.appspot.com/bug?extid=554ccde221001ab5479a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1363ccb7800000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1272e2b7800000

Reported-by: syzbot+554ccde221001ab5479a@...kaller.appspotmail.com
Fixes: 3fa6f616a7a4 ("net: ipv4: add second dif to inet socket lookups")

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