From owner-freebsd-wireless@freebsd.org Tue Jan 17 23:58:58 2017 Return-Path: Delivered-To: freebsd-wireless@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7DD60CB5B95 for ; Tue, 17 Jan 2017 23:58:58 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 6A70A17AE for ; Tue, 17 Jan 2017 23:58:58 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v0HNwuB3021150 for ; Tue, 17 Jan 2017 23:58:58 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-wireless@FreeBSD.org Subject: [Bug 211689] panic with lagg failover wireless ath and iwm Date: Tue, 17 Jan 2017 23:58:57 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: wireless X-Bugzilla-Version: 11.0-RC1 X-Bugzilla-Keywords: crash, needs-qa, patch, regression X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: asomers@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: freebsd-wireless@FreeBSD.org X-Bugzilla-Flags: mfc-stable10? mfc-stable11? X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Jan 2017 23:58:58 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211689 --- Comment #11 from Alan Somers --- Created attachment 179015 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D179015&action= =3Dedit Remove the sc_lladdr_task taskqueue Please try the attached patch. It removes the sc_lladdr_task taskqueue, and simply removes the link local addresses inline with lagg_port_destroy. The lp->detaching check in lagg_port_lladdr is there to avoid a recursive l= ock acquisition panic that happens when sending the gratuitous ARP caused by removing the link-local address. It's ok to skip sending the gratuitous ARP because we're about to destroy the lagg port, anyway. The change to in6.c is more complicated, and I need to check with some IPv6 experts to be sure that it's valid. But without that change, I find that a lagg port can end up with a link-local address even though ND6_IFF_IFDISABL= ED is set. --=20 You are receiving this mail because: You are the assignee for the bug.=