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Date: Mon, 25 Mar 2019 12:16:38 +0000 From: Ido Schimmel <idosch@...lanox.com> To: syzbot <syzbot+987e48d84abddbe2506d@...kaller.appspotmail.com>, "dvyukov@...gle.com" <dvyukov@...gle.com> CC: "ast@...nel.org" <ast@...nel.org>, "daniel@...earbox.net" <daniel@...earbox.net>, "davem@...emloft.net" <davem@...emloft.net>, Jiri Pirko <jiri@...lanox.com>, "kuznet@....inr.ac.ru" <kuznet@....inr.ac.ru>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "syzkaller-bugs@...glegroups.com" <syzkaller-bugs@...glegroups.com>, "yoshfuji@...ux-ipv6.org" <yoshfuji@...ux-ipv6.org> Subject: Re: WARNING in bpf_prog_kallsyms_add + Dmitry On Sat, Mar 23, 2019 at 07:16:01PM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 7607dd35fc34893214284cca740d015154d20452 > Author: Ido Schimmel <idosch@...lanox.com> > Date: Mon Jul 17 12:15:30 2017 +0000 > > mlxsw: spectrum: Trap IPv4 packets with Router Alert option > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14e0ac07200000 > start commit: 645ff1e8 Merge branch 'for-linus' of git://git.kernel.org/.. > git tree: upstream > final crash: https://syzkaller.appspot.com/x/report.txt?x=16e0ac07200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=12e0ac07200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=20271e14bc1c87f0 > dashboard link: https://syzkaller.appspot.com/bug?extid=987e48d84abddbe2506d > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c69d20c00000 > > Reported-by: syzbot+987e48d84abddbe2506d@...kaller.appspotmail.com > Fixes: 7607dd35fc34 ("mlxsw: spectrum: Trap IPv4 packets with Router Alert > option") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Dmitry, The bisection is probably wrong. Above mentioned commit is specific to mlxsw which is not even present in the provided kernel config. I see that this also appears in the web interface [1] which might be misleading to some people. Might be worthwhile to add a command for syzbot that tells it that bisection is wrong? [1] https://syzkaller.appspot.com/bug?id=b658eb696c8279d9951a4ceea79efba8a1d12467
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