From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:34938 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726061AbfK0GTh (ORCPT ); Wed, 27 Nov 2019 01:19:37 -0500 Date: Tue, 26 Nov 2019 22:19:34 -0800 From: Eric Biggers Subject: Re: INFO: task hung in do_ip_vs_set_ctl (2) Message-ID: <20191127061934.GC227319@sol.localdomain> References: <94eb2c059ce0bca273056940d77d@google.com> <0000000000007a85c4059841ca66@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000007a85c4059841ca66@google.com> Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: syzbot Cc: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, horms@verge.net.au, ja@ssi.bg, kadlec@blackhole.kfki.hu, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, lvs-devel@vger.kernel.org, mmarek@suse.com, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org, wensong@linux-vs.org, yamada.masahiro@socionext.com On Tue, Nov 26, 2019 at 07:47:00AM -0800, syzbot wrote: > syzbot has bisected this bug to: > > commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c > Author: Linus Torvalds > Date: Sun Jul 2 23:07:02 2017 +0000 > > Linux 4.12 > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11a2b78ce00000 > start commit: 17dec0a9 Merge branch 'userns-linus' of git://git.kernel.o.. > git tree: net-next > kernel config: https://syzkaller.appspot.com/x/.config?x=da08d02b86752ade > dashboard link: https://syzkaller.appspot.com/bug?extid=7810ed2e0cb359580c17 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130abb47800000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150a15bb800000 > > Reported-by: syzbot+7810ed2e0cb359580c17@syzkaller.appspotmail.com > Fixes: 6f7da290413b ("Linux 4.12") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection This bisection is obviously bogus, though oddly enough the bisection log shows that v4.12 crashed 10/10 times, while v4.12~1 crashed 0/10 times... Anyway, this bug looks extremely stale, as it only occurred for a 2-week period in 2018. Commit 5c64576a77 ("ipvs: fix rtnl_lock lockups caused by start_sync_thread") might have been the fix, but I'm just invalidating this: #syz invalid - Eric