Messages in this thread | | | From | Petr Machata <> | Subject | Re: general protection fault in erspan_netlink_parms | Date | Mon, 16 Mar 2020 18:00:41 +0100 |
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I've got this reproduced, it happens when IFLA_INFO_DATA is not passed, so "ip link add type erspan". The problem is that the commit referenced below doesn't check data != NULL in the ERSPAN branch. I'll send a fix later today.
syzbot <syzbot+1b4ebf4dae4e510dd219@syzkaller.appspotmail.com> writes:
> syzbot has bisected this bug to: > > commit e1f8f78ffe9854308b9e12a73ebe4e909074fc33 > Author: Petr Machata <petrm@mellanox.com> > Date: Fri Mar 13 11:39:36 2020 +0000 > > net: ip_gre: Separate ERSPAN newlink / changelink callbacks > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=101477fde00000 > start commit: 0fda7600 geneve: move debug check after netdev unregister > git tree: net > final crash: https://syzkaller.appspot.com/x/report.txt?x=121477fde00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=141477fde00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c2e311dba9a02ba9 > dashboard link: https://syzkaller.appspot.com/bug?extid=1b4ebf4dae4e510dd219 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1627f955e00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111ac52de00000 > > Reported-by: syzbot+1b4ebf4dae4e510dd219@syzkaller.appspotmail.com > Fixes: e1f8f78ffe98 ("net: ip_gre: Separate ERSPAN newlink / changelink callbacks") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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