linux-kernel - Re: general protection fault in ip6_dst_lookup

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Message-ID: <0000000000002314b3058ab3605c@google.com>
Date:   Thu, 06 Jun 2019 20:25:00 -0700
From:   syzbot <syzbot+58d8f704b86e4e3fb4d3@...kaller.appspotmail.com>
To:     ast@...nel.org, bpf@...r.kernel.org, daniel@...earbox.net,
        davem@...emloft.net, dsahern@...il.com, dvyukov@...gle.com,
        edumazet@...gle.com, kafai@...com, kuznet@....inr.ac.ru,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        songliubraving@...com, syzkaller-bugs@...glegroups.com, yhs@...com,
        yoshfuji@...ux-ipv6.org
Subject: Re: general protection fault in ip6_dst_lookup_tail (2)

syzbot has bisected this bug to:

commit f40b6ae2b612446dc970d7b51eeec47bd1619f82
Author: David Ahern <dsahern@...il.com>
Date:   Thu May 23 03:27:55 2019 +0000

     ipv6: Move pcpu cached routes to fib6_nh

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13c969a6a00000
start commit:   07c3bbdb samples: bpf: print a warning about headers_install
git tree:       bpf-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=102969a6a00000
console output: https://syzkaller.appspot.com/x/log.txt?x=17c969a6a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b7b54c66298f8420
dashboard link: https://syzkaller.appspot.com/bug?extid=58d8f704b86e4e3fb4d3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=117f50e1a00000

Reported-by: syzbot+58d8f704b86e4e3fb4d3@...kaller.appspotmail.com
Fixes: f40b6ae2b612 ("ipv6: Move pcpu cached routes to fib6_nh")

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