From owner-freebsd-bugs@FreeBSD.ORG Sat Oct 4 01:20:07 2008 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F31CE1065686 for ; Sat, 4 Oct 2008 01:20:06 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id E099B8FC0A for ; Sat, 4 Oct 2008 01:20:06 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id m941K63w037411 for ; Sat, 4 Oct 2008 01:20:06 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id m941K63M037409; Sat, 4 Oct 2008 01:20:06 GMT (envelope-from gnats) Date: Sat, 4 Oct 2008 01:20:06 GMT Message-Id: <200810040120.m941K63M037409@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: Volker Werth Cc: Subject: Re: kern/127699: [panic] Fatal trap 12: page fault while in kernel mode X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Volker Werth List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Oct 2008 01:20:07 -0000 The following reply was made to PR kern/127699; it has been noted by GNATS. From: Volker Werth To: Wouter Snels Cc: bug-followup@freebsd.org Subject: Re: kern/127699: [panic] Fatal trap 12: page fault while in kernel mode Date: Sat, 04 Oct 2008 02:42:58 +0200 On 10/03/08 23:37, Wouter Snels wrote: > I'm glad someone is anwering, I did however do make update just today in > /usr/src i was planning to update the kernel since i've noticed there is > a new IPv6 security issue, .. incase it matters, .. Have you already recompiled and installed a new kernel? This would make our debugging much harder. > Also thank you for the for the information on compiling the kernel. > > vmcore.3 > > kgdb /boot/kernel/kernel /var/crash/vmcore.3 > [GDB will not be able to debug user-mode threads: > /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] > GNU gdb 6.1.1 [FreeBSD] > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "i386-marcel-freebsd". > bt > > Unread portion of the kernel message buffer: > > > Fatal trap 12: page fault while in kernel mode > cpuid = 3; apic id = 02 > fault virtual address = 0x4c > fault code = supervisor read, page not present > instruction pointer = 0x20:0xc577373d > stack pointer = 0x28:0xe8edd808 > frame pointer = 0x28:0xe8edd84c > 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 = 7569 (irssi) > trap number = 12 > panic: page fault > cpuid = 3 > Uptime: 14h39m53s > Physical memory: 2035 MB > Dumping 182 MB: 167 151 135 119 103 87 71 55 39 23 7 > > #0 doadump () at pcpu.h:195 > 195 pcpu.h: No such file or directory. > in pcpu.h > (kgdb) bt > #0 doadump () at pcpu.h:195 > #1 0xc0754507 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409 > #2 0xc07547c9 in panic (fmt=Variable "fmt" is not available. > ) at /usr/src/sys/kern/kern_shutdown.c:563 > #3 0xc0a5632c in trap_fatal (frame=0xe8edd7c8, eva=76) > at /usr/src/sys/i386/i386/trap.c:899 > #4 0xc0a56590 in trap_pfault (frame=0xe8edd7c8, usermode=0, eva=76) > at /usr/src/sys/i386/i386/trap.c:812 > #5 0xc0a56f12 in trap (frame=0xe8edd7c8) at > /usr/src/sys/i386/i386/trap.c:490 > #6 0xc0a3d88b in calltrap () at /usr/src/sys/i386/i386/exception.s:139 > #7 0xc577373d in ?? () > Previous frame inner to this frame (corrupt stack?) > (kgdb) Ok, this is from within if_stf.ko which has not been loaded while you were running kgdb. Assuming the kernel hasn't been recompiled since your last crash, can you please try: ``kgdb -q'' (kgdb) list *0xc577373d This will get a code fragment from your currently running kernel and list us the source of the lines causing the crash. From your output, I'm pretty sure the fault is caused by if_stf. We just need to figure out what's causing this so we need a hint which function has called what. > vmcore.1 > > kgdb /boot/kernel/kernel /var/crash/vmcore.1 > [GDB will not be able to debug user-mode threads: > /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] > GNU gdb 6.1.1 [FreeBSD] > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "i386-marcel-freebsd". > bt > > Unread portion of the kernel message buffer: > <118>Aug 31 15:32:26 syslogd: exiting on signal 15 > Waiting (max 60 seconds) for system process `vnlru' to stop...done > Waiting (max 60 seconds) for system process `bufdaemon' to stop...done > Waiting (max 60 seconds) for system process `syncer' to stop... > Syncing disks, vnodes remaining...3 2 1 0 0 0 done > All buffers synced. > panic: dqflush: stray dquot > cpuid = 0 > Uptime: 21h5m59s > Physical memory: 2035 MB > Dumping 230 MB: 215 199 183 167 151 135 119 103 87 71 55 39 23 7 > > #0 doadump () at pcpu.h:195 > 195 pcpu.h: No such file or directory. > in pcpu.h > (kgdb) bt > #0 doadump () at pcpu.h:195 > #1 0xc0754507 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409 > #2 0xc07547c9 in panic (fmt=Variable "fmt" is not available. > ) at /usr/src/sys/kern/kern_shutdown.c:563 > #3 0xc0969a1c in quotaoff1 (td=0xc6786880, mp=Variable "mp" is not > available. > ) at /usr/src/sys/ufs/ufs/ufs_quota.c:1443 > #4 0xc0969d08 in quotaoff_inchange (td=Variable "td" is not available. > ) at /usr/src/sys/ufs/ufs/ufs_quota.c:721 > #5 0xc0969f81 in quotaoff (td=0xc6786880, mp=0xc551c7d4, type=0) at > /usr/src/sys/ufs/ufs/ufs_quota.c:763 > #6 0xc095afb1 in ffs_flushfiles (mp=0xc551c7d4, flags=2, td=0xc6786880) > at /usr/src/sys/ufs/ffs/ffs_vfsops.c:1096 > #7 0xc09506f7 in softdep_flushfiles (oldmnt=0xc551c7d4, flags=2, > td=0xc6786880) at /usr/src/sys/ufs/ffs/ffs_softdep.c:1095 > #8 0xc095b10d in ffs_unmount (mp=0xc551c7d4, mntflags=524288, > td=0xc6786880) at /usr/src/sys/ufs/ffs/ffs_vfsops.c:1031 > #9 0xc07c72df in dounmount (mp=0xc551c7d4, flags=524288, td=0xc6786880) > at /usr/src/sys/kern/vfs_mount.c:1286 > #10 0xc07cd4c3 in vfs_unmountall () at /usr/src/sys/kern/vfs_subr.c:2936 > #11 0xc0754294 in boot (howto=0) at /usr/src/sys/kern/kern_shutdown.c:391 > #12 0xc07546b7 in reboot (td=0xc6786880, uap=0xe8e34cfc) at > /usr/src/sys/kern/kern_shutdown.c:169 > #13 0xc0a568e5 in syscall (frame=0xe8e34d38) at > /usr/src/sys/i386/i386/trap.c:1035 > #14 0xc0a3d8f0 in Xint0x80_syscall () at > /usr/src/sys/i386/i386/exception.s:196 > #15 0x00000033 in ?? () > Previous frame inner to this frame (corrupt stack?) > (kgdb) This one is different. It's caused by quotas. Can you reproduce this? Volker