From owner-freebsd-bugs@FreeBSD.ORG Tue Sep 16 11:20:33 2014 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1726F901 for ; Tue, 16 Sep 2014 11:20:33 +0000 (UTC) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id D951CCC4 for ; Tue, 16 Sep 2014 11:20:32 +0000 (UTC) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id s8GBKWW9048926 for ; Tue, 16 Sep 2014 11:20:32 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 193681] kernel panic: dhclient NULL pointer in ether_output_frame() when using dummynet at layer2 Date: Tue, 16 Sep 2014 11:20:33 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: kate@elide.org X-Bugzilla-Status: Needs Triage X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 11:20:33 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193681 --- Comment #1 from Kate --- In the absence of bridge0, I have a different symptom: (from a fresh boot) # ifconfig bridge0 destroy arge1: promiscuous mode disabled arge0: promiscuous mode disabled bridge0: link state changed to DOWN # ipfw add 100 pipe 1 ip from any to any layer2 00100 pipe 1 ip from any to any layer2 # ipfw pipe 1 config # dhclient arge0 DHCPREQUEST on arge0 to 255.255.255.255 port 67 Trap cause = 4 (address error (load or I-fetch) - kernel mode) [ thread pid 394 tid 100054 ] Stopped at ipfw_chk+0x840: lw a0,0(a1) db> db> db> db> show reg at 0xffffffe0 v0 0x800 _DYNAMIC_LINKING+0x7ff v1 0x800 _DYNAMIC_LINKING+0x7ff a0 0x148 _DYNAMIC_LINKING+0x147 a1 0x80dd800e a2 0x156 _DYNAMIC_LINKING+0x155 a3 0x80d75400 t0 0x81d08990 t1 0x81d08990 t2 0x4 _DYNAMIC_LINKING+0x3 t3 0x62 _DYNAMIC_LINKING+0x61 t4 0x4080012c t5 0x2000 _DYNAMIC_LINKING+0x1fff t6 0x40c5c000 t7 0x40da28 s0 0x80dd8000 s1 0xc0473bf4 s2 0x2 _DYNAMIC_LINKING+0x1 s3 0x80790400 s4 0 s5 0x80790400 s6 0x80d75400 s7 0xc0473aa4 t8 0x1c _DYNAMIC_LINKING+0x1b t9 0x405ad580 k0 0 k1 0x54175305 gp 0x8056f200 _gp sp 0xc04739c0 s8 0x429064 ra 0x803a61b4 ipfw_check_frame+0x14c sr 0xfc03 _DYNAMIC_LINKING+0xfc02 lo 0x771ec0 hi 0x6 _DYNAMIC_LINKING+0x5 bad 0x80dd800e cs 0x10 _DYNAMIC_LINKING+0xf pc 0x803a0208 ipfw_chk+0x840 ipfw_chk+0x840: lw a0,0(a1) db> (kgdb) list *ipfw_chk+0x840 0x803a0208 is in ipfw_chk (/usr/home/kate/src/freebsd/sys/netpfil/ipfw/ip_fw2.c:1186). which is: 1186: } else if (pktlen >= sizeof(struct ip) && 1187: (args->eh == NULL || etype == ETHERTYPE_IP) && ip->ip_v == 4) { -- You are receiving this mail because: You are the assignee for the bug.