linux-kernel - Re: general protection fault in rt6_fill

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Date:   Thu, 01 Oct 2020 11:46:04 -0700
From:   syzbot <syzbot+81af6e9b3c4b8bc874f8@...kaller.appspotmail.com>
To:     John.Linn@...inx.com, a@...table.cc, anant.thazhemadam@...il.com,
        andriin@...com, anirudh@...inx.com, ast@...nel.org,
        b.a.t.m.a.n@...ts.open-mesh.org, bpf@...r.kernel.org,
        daniel@...earbox.net, davem@...emloft.net, dsahern@...il.com,
        hancock@...systems.ca, john.fastabend@...il.com, kafai@...com,
        kpsingh@...omium.org, kuba@...nel.org, kuznet@....inr.ac.ru,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        mareklindner@...mailbox.ch, michal.simek@...inx.com,
        netdev@...r.kernel.org, nikolay@...ulusnetworks.com,
        songliubraving@...com, sw@...onwunderlich.de,
        syzkaller-bugs@...glegroups.com, yhs@...com,
        yoshfuji@...ux-ipv6.org
Subject: Re: general protection fault in rt6_fill_node

syzbot suspects this issue was fixed by commit:

commit eeaac3634ee0e3f35548be35275efeca888e9b23
Author: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Date:   Sat Aug 22 12:06:36 2020 +0000

    net: nexthop: don't allow empty NHA_GROUP

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12beed5b900000
start commit:   c3d8f220 Merge tag 'kbuild-fixes-v5.9' of git://git.kernel..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=a0437fdd630bee11
dashboard link: https://syzkaller.appspot.com/bug?extid=81af6e9b3c4b8bc874f8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13ff8539900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143f3a96900000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: net: nexthop: don't allow empty NHA_GROUP

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