From owner-freebsd-bugs Sun Jan 18 10:50:16 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA02069 for freebsd-bugs-outgoing; Sun, 18 Jan 1998 10:50:16 -0800 (PST) (envelope-from owner-freebsd-bugs@FreeBSD.ORG) Received: (from gnats@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA02020; Sun, 18 Jan 1998 10:50:04 -0800 (PST) (envelope-from gnats) Received: from passer.osg.gov.bc.ca (passer.osg.gov.bc.ca [142.32.110.29]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA01408 for ; Sun, 18 Jan 1998 10:46:10 -0800 (PST) (envelope-from cy@cschuber.net.gov.bc.ca) Received: (from uucp@localhost) by passer.osg.gov.bc.ca (8.8.8/8.6.10) id KAA23871 for ; Sun, 18 Jan 1998 10:40:30 -0800 (PST) Received: from cschuber.net.gov.bc.ca(142.31.240.113), claiming to be "cwsys.cwsent.com" via SMTP by passer.osg.gov.bc.ca, id smtpdaavzfa; Sun Jan 18 10:40:18 1998 Received: (from cy@localhost) by cwsys.cwsent.com (8.8.8/8.6.10) id KAA01204; Sun, 18 Jan 1998 10:40:14 -0800 (PST) Message-Id: <199801181840.KAA01204@cwsys.cwsent.com> Date: Sun, 18 Jan 1998 10:40:14 -0800 (PST) From: cschuber@uumail.gov.bc.ca Reply-To: cschuber@uumail.gov.bc.ca To: FreeBSD-gnats-submit@FreeBSD.ORG X-Send-Pr-Version: 3.2 Subject: kern/5517: Recursive NULLFS Mount Panic Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org >Number: 5517 >Category: kern >Synopsis: Recursive NULLFS mount causes ufs_ihashget panic >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jan 18 10:50:02 PST 1998 >Last-Modified: >Originator: Cy Schubert >Organization: ITSD, Province of British Columbia >Release: FreeBSD 2.2.5-RELEASE i386 >Environment: FreeBSD cwtest 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Fri Jan 2 09:43:23 PST 1998 root@cwsys:/opt/usr_src/sys/compile/CWTEST i386 and FreeBSD cwsys 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Fri Jan 2 09:33:59 PST 1998 root@cwsys:/opt/usr_src/sys/compile/CWSYS i386 >Description: Recursive mount of nullfs filesystem causes panic at ufs_ihashget. I suspect that umapfs, because it is designed closely on nullfs, will have the same problem. KGDB output: IdlePTD 1e6000 current pcb at 1cbc6c panic: ufs_ihashget: recursive lock not expected -- pid %d #0 boot (howto=256) at ../../kern/kern_shutdown.c:266 266 dumppcb.pcb_cr3 = rcr3(); (kgdb) bt #0 boot (howto=256) at ../../kern/kern_shutdown.c:266 #1 0xf010ea22 in panic ( fmt=0xf0188720 "ufs_ihashget: recursive lock not expected -- pid %d\n") at ../../kern/kern_shutdown.c:390 #2 0xf01887d1 in ufs_ihashget (device=0, inum=9) at ../../ufs/ufs/ufs_ihash.c:109 #3 0xf0186943 in ffs_vget (mp=0xf0531c00, ino=9, vpp=0xefbffdbc) at ../../ufs/ffs/ffs_vfsops.c:868 #4 0xf0189754 in ufs_lookup (ap=0xefbffe2c) at ../../ufs/ufs/ufs_lookup.c:561 #5 0xf012c0f9 in lookup (ndp=0xefbfff0c) at vnode_if.h:31 #6 0xf012bc3b in namei (ndp=0xefbfff0c) at ../../kern/vfs_lookup.c:156 #7 0xf0132ba2 in nullfs_mount (mp=0xf053f200, path=0xefbfdcde "/mnt", data=0xefbfd834 "<Ø¿ï", ndp=0xefbfff0c, p=0xf053f600) at ../../miscfs/nullfs/null_vfsops.c:121 #8 0xf012e607 in mount (p=0xf053f600, uap=0xefbfff94, retval=0xefbfff84) at ../../kern/vfs_syscalls.c:192 #9 0xf01a5a4f in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 0, tf_esi = -272638876, tf_ebp = -272638916, tf_isp = -272629788, tf_ebx = 54632, tf_edx = 57376, tf_ecx = 61440, tf_eax = 21, tf_trapno = 12, tf_err = 7, tf_eip = 9381, tf_cs = 31, tf_eflags = 514, tf_esp = -272639976, tf_ss = 39}) at ../../i386/i386/trap.c:914 #10 0x24a5 in ?? () #11 0x107e in ?? () >How-To-Repeat: mount -t null /usr/bin /mnt mount -t null /usr/bin /mnt # twice >Fix: I have no fix at this time. >Audit-Trail: >Unformatted: