Date: Wed, 20 Apr 2005 14:43:00 -0700 From: Kris Kennaway <kris@obsecurity.org> To: othermark <atkin901@yahoo.com> Cc: freebsd-current@freebsd.org Subject: Re: LOR/page fault panic vfs_mountroot Message-ID: <20050420214259.GA46821@xor.obsecurity.org> In-Reply-To: <d46cbi$8pl$1@sea.gmane.org> References: <d46cbi$8pl$1@sea.gmane.org>
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[-- Attachment #1 --] On Wed, Apr 20, 2005 at 01:04:08PM -0700, othermark wrote: > Current as of a few minutes ago. LOR/panic. Dual processor box. > > kernel has vlan, ipfw, and dummynet enabled, but this doesn't > look like the problem. > > Curiously, booting single user and mounting root there doesn't > panic, but it does panic if you try to 'exit' to multiuser. > > [...] > Timecounters tick every 1.000 msec > ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding disabled, > default to accept, logging disabled > ad0: 19092MB <WDC WD200EB-32CSF0 04.01B04> at ata0-master UDMA33 > acd0: CDROM <TOSHIBA CD-ROM XM-6702B/1007> at ata1-master UDMA33 > ATA PseudoRAID loaded > SMP: AP CPU #1 Launched! > Trying to mount root from ufs:/dev/ad0s1a > lock order reversal > 1st 0xc0a2d740 vm page queue mutex (vm page queue mutex) > @ /usr/src/sys/kern/vfs_bio.c:1485 > 2nd 0xc25e4d6c vnode interlock (vnode interlock) > @ /usr/src/sys/kern/vfs_subr.c:1992 This has been reported a half-dozen times or so. > Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 01 > fault virtual address = 0x4ac0c092 > fault code = supervisor read, page not present > instruction pointer = 0x20:0xc0703f88 > stack pointer = 0x28:0xe5092b78 > frame pointer = 0x28:0xe5092b78 > 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 = 73 (sysctl) > [thread pid 73 tid 100060 ] > Stopped at strlen+0x8: cmpb $0,0(%edx) > db> show alllocks > Process 73 (sysctl) thread 0xc23b2600 (100060) > exclusive sx sysctl lock r = 0 (0xc09d1c60) locked > @ /usr/src/sys/kern/kern_sysctl.c:1335 > exclusive sleep mutex Giant r = 0 (0xc09d1620) locked > @ /usr/src/sys/kern/kern_sysctl.c:1273 I think this one might be new. Please obtain a debugging traceback. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCZszjWry0BWjoQKURAq2XAJ4k3OYEbV2m/5ptuKKGcnwAJMS+RQCeK/Bx CIKNCGTjosvqefmh+3c6Gu8= =AiZ/ -----END PGP SIGNATURE-----
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