From owner-freebsd-current@FreeBSD.ORG Wed Sep 23 15:49:12 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0786B106568F for ; Wed, 23 Sep 2009 15:49:12 +0000 (UTC) (envelope-from a_best01@uni-muenster.de) Received: from zivm-exrelay2.uni-muenster.de (ZIVM-EXRELAY2.UNI-MUENSTER.DE [128.176.192.15]) by mx1.freebsd.org (Postfix) with ESMTP id 92D268FC16 for ; Wed, 23 Sep 2009 15:49:11 +0000 (UTC) X-IronPort-AV: E=Sophos;i="4.44,439,1249250400"; d="scan'208";a="224440165" Received: from zivmaildisp2.uni-muenster.de (HELO ZIVMAILUSER04.UNI-MUENSTER.DE) ([128.176.188.143]) by zivm-relay2.uni-muenster.de with ESMTP; 23 Sep 2009 17:49:10 +0200 Received: by ZIVMAILUSER04.UNI-MUENSTER.DE (Postfix, from userid 149459) id 7A9EE1B0096; Wed, 23 Sep 2009 17:49:10 +0200 (CEST) Date: Wed, 23 Sep 2009 17:49:10 +0200 (CEST) From: Alexander Best Sender: Organization: Westfaelische Wilhelms-Universitaet Muenster To: Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: Subject: panic after doing `umount` and `ls` X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Sep 2009 15:49:12 -0000 running r197427 (i386): after issueing the following commands in single user mode: `mount -r -o noatime /dev/label/rootfs /usr` `umount /usr` `cd /usr && ls` i got the following panic: Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0xdeadc112 fault code = supervisor read, page not present instruction pointer = 0x20:0xc05c4301 stack pointer = 0x28:0xe7e2f82c frame pointer = 0x28:0xe7e2f854 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 = 29 (ls) panic: from debugger cpuid = 0 KDB: stack backtrace: Uptime: 1m44s Physical memory: 2034 MB Dumping 74 MB: 59 43 27 11 #0 doadump () at /usr/src/sys/kern/kern_shutdown.c:245 #1 0xc063dc47 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:416 #2 0xc063e06c in panic (fmt=Could not find the frame base for "panic". ) at /usr/src/sys/kern/kern_shutdown.c:579 #3 0xc046e537 in db_panic (addr=Could not find the frame base for "db_panic". ) at /usr/src/sys/ddb/db_command.c:478 #4 0xc046e474 in db_command (last_cmdp=0xc093c5bc, cmd_table=0x0, dopager=1) at /usr/src/sys/ddb/db_command.c:445 #5 0xc046e5a8 in db_command_loop () at /usr/src/sys/ddb/db_command.c:498 #6 0xc0470db2 in db_trap (type=12, code=0) at /usr/src/sys/ddb/db_main.c:229 #7 0xc067583e in kdb_trap (type=12, code=0, tf=0xe7e2f7ec) at /usr/src/sys/kern/subr_kdb.c:535 #8 0xc084787f in trap_fatal (frame=0xe7e2f7ec, eva=3735929106) at /usr/src/sys/i386/i386/trap.c:929 #9 0xc0847468 in trap_pfault (frame=0xe7e2f7ec, usermode=0, eva=3735929106) at /usr/src/sys/i386/i386/trap.c:851 #10 0xc0846e2a in trap (frame=0xe7e2f7ec) at /usr/src/sys/i386/i386/trap.c:533 #11 0xc0821d8b in calltrap () at /usr/src/sys/i386/i386/exception.s:165 #12 0xc05c4301 in g_io_request (bp=0xc7e25688, cp=0xc7e2b780) at /usr/src/sys/geom/geom_io.c:425 #13 0xc05cb165 in g_vfs_strategy (bo=0xc7b37a5c, bp=0xd94eaa54) at /usr/src/sys/geom/geom_vfs.c:130 #14 0xc07c4516 in ffs_geom_strategy (bo=0xc7b37a5c, bp=0xd94eaa54) at /usr/src/sys/ufs/ffs/ffs_vfsops.c:1954 #15 0xc07d731a in ufs_strategy (ap=0xe7e2f910) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2040 #16 0xc0858c78 in VOP_STRATEGY_APV (vop=0xc09249e0, a=0xe7e2f910) at vnode_if.c:2171 #17 0xc06d706e in VOP_STRATEGY (vp=0xc7b376b8, bp=0xd94eaa54) at vnode_if.h:940 #18 0xc06d6fff in bufstrategy (bo=0xc7b377ac, bp=0xd94eaa54) at /usr/src/sys/kern/vfs_bio.c:3926 #19 0xc06cff97 in bstrategy (bp=0xd94eaa54) at buf.h:397 #20 0xc06d00b5 in breadn (vp=0xc7b376b8, blkno=0, size=2048, rablkno=0x0, rabsize=0x0, cnt=0, cred=0x0, bpp=0xe7e2fa7c) at /usr/src/sys/kern/vfs_bio.c:813 #21 0xc06cfd4c in bread (vp=0xc7b376b8, blkno=0, size=2048, cred=0x0, bpp=0xe7e2fa7c) at /usr/src/sys/kern/vfs_bio.c:748 #22 0xc07c5449 in ffs_read (ap=0xe7e2fac4) at /usr/src/sys/ufs/ffs/ffs_vnops.c:526 #23 0xc0856a34 in VOP_READ_APV (vop=0xc09244e0, a=0xe7e2fac4) at vnode_if.c:887 #24 0xc07d70ea in VOP_READ (vp=0xc7b376b8, uio=0xe7e2fbf4, ioflag=0, cred=0xc7558480) at vnode_if.h:384 #25 0xc07d6da1 in ufs_readdir (ap=0xe7e2fbb4) at /usr/src/sys/ufs/ufs/ufs_vnops.c:1903 #26 0xc0858224 in VOP_READDIR_APV (vop=0xc09249e0, a=0xe7e2fbb4) at vnode_if.c:1737 #27 0xc06fdfe6 in VOP_READDIR (vp=0xc7b376b8, uio=0xe7e2fbf4, cred=0xc7558480, eofflag=0xe7e2fc28, ncookies=0x0, cookies=0x0) at vnode_if.h:758 #28 0xc06fde0b in kern_getdirentries (td=0xc7eff690, fd=5, buf=0x28218000
, count=4096, basep=0xe7e2fc64) at /usr/src/sys/kern/vfs_syscalls.c:4103 #29 0xc06fdbf6 in getdirentries (td=0xc7eff690, uap=0xe7e2fce8) at /usr/src/sys/kern/vfs_syscalls.c:4051 #30 0xc0847d06 in syscall (frame=0xe7e2fd38) at /usr/src/sys/i386/i386/trap.c:1078 #31 0xc0821df0 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:261 #32 0x00000033 in ?? () Previous frame inner to this frame (corrupt stack?) with /dev/label/rootfs already being mounted under /. cheers. alex