From owner-freebsd-stable Thu May 30 8: 4:22 2002 Delivered-To: freebsd-stable@freebsd.org Received: from dastardly.newsbastards.org.72.27.172.IN-addr.ARPA.NetScum.dyndns.dk (dclient80-218-17-199.hispeed.ch [80.218.17.199]) by hub.freebsd.org (Postfix) with ESMTP id 18ECC37B416 for ; Thu, 30 May 2002 08:04:02 -0700 (PDT) Received: from beerswilling.netscum.dyndns.dk ([2002:50da:11c7:0:200:c0ff:fefc:19aa]) by dastardly.newsbastards.org.72.27.172.IN-addr.ARPA.NetScum.dyndns.dk (8.11.6/8.11.6-SPAMMERS-DeLiGHt) with ESMTP id g4UF3wl15722 (using TLSv1/SSLv3 with cipher EDH-RSA-DES-CBC3-SHA (168 bits) verified NO) for ; Thu, 30 May 2002 17:04:00 +0200 (CEST) (envelope-from bounce@cvsup.netscum.dyndns.dk) Received: (from root@localhost) by beerswilling.netscum.dyndns.dk (8.11.6/SMI-4.1-R00T0WNED) id g4UF3wT15721; Thu, 30 May 2002 17:03:58 +0200 (CEST) (envelope-from bounce@cvsup.netscum.dyndns.dk) Date: Thu, 30 May 2002 17:03:58 +0200 (CEST) Message-Id: <200205301503.g4UF3wT15721@beerswilling.netscum.dyndns.dk> From: BOUWSMA Beery Organization: Men not wearing any pants that dont shave To: freebsd-stable@freebsd.org Subject: Panic in IPv6... X-Hacked: via telnet to your port 25, what else? X-Internet-Access-Provided-By: Mountain Informatik AG X-NetScum: Yes X-One-And-Only-Real-True-Fluffy: No Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Howdy, I just saw a panic with 4.5-STABLE built around 10.March I have a DHCP-assigned address, from which I derive a 6to4 IPv6 address assigned to the stf0 interface. What happened this time was that the IPv4-assigned address from DHCP changed, and I wasn't paying attention (also, I hadn't hacked things to change everything as I should) Of course, the IPv6 network seemed to be down. So I brought up a gif tunnel, then did a `netstat -nr' command, and *POW* Here's the trace Fatal trap 12: page fault while in kernel mode fault virtual address = 0xef920220 fault code = supervisor read, page not present instruction pointer = 0x8:0xc01e69cb stack pointer = 0x10:0xc7269b9c frame pointer = 0x10:0xc7269bb4 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 338 (bplay) interrupt mask = trap number = 12 panic: page fault [...] #4 0xc028e97d in trap_pfault (frame=0xc7269b5c, usermode=0, eva=4019323424) at /usr/src/sys/i386/i386/trap.c:859 #5 0xc028e4f7 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, tf_edi = -275643904, tf_esi = -1053182208, tf_ebp = -953771084, tf_isp = -953771128, tf_ebx = -1053657088, tf_edx = -1053179624, tf_ecx = -1070262636, tf_eax = -1053657312, tf_trapno = 12, tf_err = 0, tf_eip = -1071748661, tf_cs = 8, tf_eflags = 66182, tf_esp = 0, tf_ss = -1071748756}) at /usr/src/sys/i386/i386/trap.c:458 #6 0xc01e69cb in nd6_timer (ignored_arg=0x0) at /usr/src/sys/netinet6/nd6.c:445 #7 0xc0173ead in softclock () at /usr/src/sys/kern/kern_timeout.c:131 #8 0xc0282f5f in doreti_swi () #9 0xc0177aa9 in diskstrategy (bp=0xc2886074) at /usr/src/sys/kern/subr_disk.c:251 #10 0xc01a6e58 in spec_strategy (ap=0xc7269ca4) at /usr/src/sys/miscfs/specfs/spec_vnops.c:479 #11 0xc01a6881 in spec_vnoperate (ap=0xc7269ca4) at /usr/src/sys/miscfs/specfs/spec_vnops.c:119 #12 0xc0214c01 in ufs_vnoperatespec (ap=0xc7269ca4) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2440 #13 0xc0214501 in ufs_strategy (ap=0xc7269ce8) at vnode_if.h:944 #14 0xc0214bd1 in ufs_vnoperate (ap=0xc7269ce8) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2422 #15 0xc0193966 in bwrite (bp=0xc2886074) at vnode_if.h:944 #16 0xc01990b6 in vop_stdbwrite (ap=0xc7269d24) at /usr/src/sys/kern/vfs_default.c:331 #17 0xc0198f11 in vop_defaultop (ap=0xc7269d24) at /usr/src/sys/kern/vfs_default.c:150 #18 0xc0214bd1 in ufs_vnoperate (ap=0xc7269d24) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2422 #19 0xc0193cb6 in bawrite (bp=0xc2886074) at vnode_if.h:1193 #20 0xc019877f in cluster_wbuild (vp=0xc7254780, size=65536, start_lbn=89454, len=2) at /usr/src/sys/kern/vfs_cluster.c:945 #21 0xc01982a2 in cluster_write (bp=0xc28ce014, filesize=5862457344, seqcount=127) at /usr/src/sys/kern/vfs_cluster.c:576 #22 0xc020d876 in ffs_write (ap=0xc7269e64) at /usr/src/sys/ufs/ufs/ufs_readwrite.c:544 #23 0xc01a2dae in vn_write (fp=0xc150fac0, uio=0xc7269ed4, cred=0xc13f8480, flags=0, p=0xc6707520) at vnode_if.h:363 #24 0xc017cd8d in dofilewrite (p=0xc6707520, fp=0xc150fac0, fd=3, buf=0x30058000, nbyte=65536, offset=-1, flags=0) at /usr/src/sys/sys/file.h:162 ---Type to continue, or q to quit--- #25 0xc017cc46 in write (p=0xc6707520, uap=0xc7269f80) at /usr/src/sys/kern/sys_generic.c:329 #26 0xc028ef85 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 65536, tf_esi = 1, tf_ebp = -1077937404, tf_isp = -953770028, tf_ebx = 0, tf_edx = 3, tf_ecx = 805666816, tf_eax = 4, tf_trapno = 7, tf_err = 2, tf_eip = 672002840, tf_cs = 31, tf_eflags = 518, tf_esp = -1077937464, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1167 #27 0xc0281b45 in Xint0x80_syscall () #28 0x8049228 in ?? () #29 0x8048add in ?? () This is the IPv6-related line of interest #6 0xc01e69cb in nd6_timer (ignored_arg=0x0) at /usr/src/sys/netinet6/nd6.c:445 445 if ((ifp = rt->rt_ifp) == NULL) { date of source is nd6.c,v 1.2.2.10 2001/12/20 10:30:19 ru Anyone care to give a quick tutorial on what more I want to look at? I see that (kgdb) p ifp $6 = (struct ifnet *) 0xef920200 and (kgdb) p *rt $8 = {rt_nodes = {{rn_mklist = 0xc13b9c00, rn_parent = 0xa4, rn_bit = 1, [...] rt_flags = 2148269631, rt_ifp = 0xef920200, rt_ifa = 0x0, and (kgdb) p rt->rt_ifp $9 = (struct ifnet *) 0xef920200 but (kgdb) p *ifp Cannot access memory at address 0xef920200. (same for *rt->rt_ifp) if that means anything. Feel free to tell me to update; I need a good kick in the pants thanks barry bouwsma To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message