From owner-freebsd-bugs Wed Jan 22 4:50: 6 2003 Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6BAA637B401 for ; Wed, 22 Jan 2003 04:50:03 -0800 (PST) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7E11C43F13 for ; Wed, 22 Jan 2003 04:50:02 -0800 (PST) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.6/8.12.6) with ESMTP id h0MCo2NS099420 for ; Wed, 22 Jan 2003 04:50:02 -0800 (PST) (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.6/8.12.6/Submit) id h0MCo2uW099419; Wed, 22 Jan 2003 04:50:02 -0800 (PST) Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B5C7037B401 for ; Wed, 22 Jan 2003 04:43:43 -0800 (PST) Received: from relay.nvnpp.vrn.ru (relay.nvnpp.vrn.ru [195.98.93.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6D66B43F18 for ; Wed, 22 Jan 2003 04:43:41 -0800 (PST) (envelope-from gpr@nvnpp.vrn.ru) Received: from gpr by relay.nvnpp.vrn.ru with local (Exim) id 18bKEF-0006JF-00 for FreeBSD-gnats-submit@freebsd.org; Wed, 22 Jan 2003 15:43:39 +0300 Message-Id: Date: Wed, 22 Jan 2003 15:43:39 +0300 From: Gennady Proskurin Reply-To: Gennady Proskurin To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Subject: kern/47359: panic after kldunload snp Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org >Number: 47359 >Category: kern >Synopsis: panic after kldunload snp >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jan 22 04:50:01 PST 2003 >Closed-Date: >Last-Modified: >Originator: Gennady Proskurin >Release: FreeBSD 4.7-RELEASE-p3 i386 >Organization: >Environment: >Description: When snp module unloaded after watch(8) connected and disconnected from tty, doing lstat(2) on /dev/snp* makes system panic. >How-To-Repeat: - Compile kernel without snp - Watch some tty, then exit watch - kldunload snp - ls -l /dev/snp* panic... I kept core, so I can give some additional information from gdb. IdlePTD at phsyical address 0x002fc000 initial pcb at physical address 0x00278960 panicstr: page fault panic messages: --- Fatal trap 12: page fault while in kernel mode fault virtual address = 0xc18b8510 fault code = supervisor read, page not present instruction pointer = 0x8:0xc0196005 stack pointer = 0x10:0xccf2bdd0 frame pointer = 0x10:0xccf2bddc 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 = 11876 (ls) interrupt mask = none trap number = 12 panic: page fault syncing disks... 13 1 1 done Uptime: 12d6h2m26s dumping to dev #da/0x20001, offset 8192 --- #0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487 487 if (dumping++) { (kgdb) bt #0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487 #1 0xc0166d9c in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:316 #2 0xc01671e9 in panic (fmt=0xc024e84c "%s") at /usr/src/sys/kern/kern_shutdown.c:595 #3 0xc0216564 in trap_fatal (frame=0xccf2bd90, eva=3247146256) at /usr/src/sys/i386/i386/trap.c:974 #4 0xc0216201 in trap_pfault (frame=0xccf2bd90, usermode=0, eva=3247146256) at /usr/src/sys/i386/i386/trap.c:867 #5 0xc0215d73 in trap (frame={tf_fs = -856555504, tf_es = -867827696, tf_ds = -861601776, tf_edi = -862491648, tf_esi = -862491648, tf_ebp = -856506916, tf_isp = -856506948, tf_ebx = 0, tf_edx = 0, tf_ecx = 7, tf_eax = -1047821088, tf_trapno = 12, tf_err = 0, tf_eip = -1072078843, tf_cs = 8, tf_eflags = 66178, tf_esp = -1055470080, tf_ss = -856506868}) at /usr/src/sys/i386/i386/trap.c:466 #6 0xc0196005 in vn_isdisk (vp=0xcc976c00, errp=0x0) at /usr/src/sys/kern/vfs_subr.c:3072 #7 0xc019bcac in vn_stat (vp=0xcc976c00, sb=0xccf2bed4, p=0xccd71ba0) at /usr/src/sys/kern/vfs_vnops.c:536 #8 0xc0198593 in lstat (p=0xccd71ba0, uap=0xccf2bf80) at /usr/src/sys/kern/vfs_syscalls.c:1826 #9 0xc021679a in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 134880256, tf_esi = 134897812, tf_ebp = -1077939084, tf_isp = -856506412, tf_ebx = 134880328, tf_edx = 134881408, tf_ecx = 0, tf_eax = 190, tf_trapno = 12, tf_err = 2, tf_eip = 134575376, tf_cs = 31, tf_eflags = 659, tf_esp = -1077939224, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1175 #10 0xc0209625 in Xint0x80_syscall () #11 0x8056e45 in ?? () #12 0x8056a8c in ?? () #13 0x8048b91 in ?? () #14 0x8048a1c in ?? () #15 0x8048135 in ?? () (kgdb) l *0xc0196005 0xc0196005 is in vn_isdisk (/usr/src/sys/kern/vfs_subr.c:3072). 3067 if (!devsw(vp->v_rdev)) { 3068 if (errp != NULL) 3069 *errp = ENXIO; 3070 return (0); 3071 } 3072 if (!(devsw(vp->v_rdev)->d_flags & D_DISK)) { 3073 if (errp != NULL) 3074 *errp = ENOTBLK; 3075 return (0); 3076 } (kgdb) >Fix: >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message