Date: Wed, 02 Apr 1997 09:12:36 +1000 From: Stephen Hocking <sysseh@devetir.qld.gov.au> To: FreeBSD-gnats-submit@freebsd.org Cc: toor@dyson.iquest.net Subject: kern/3168: Panic: lockmgr: locking against myself Message-ID: <199704012312.XAA21873@netfl15a.devetir.qld.gov.au> Resent-Message-ID: <199704012320.PAA11969@freefall.freebsd.org>
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>Number: 3168
>Category: kern
>Synopsis: Machine crashes when starting X or xdm
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Apr 1 15:20:02 PST 1997
>Last-Modified:
>Originator: S Hocking
>Organization:
Only occasional
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
ctm src-cur 2828, started at src-cur 2827
Copyright (c) 1992-1997 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.0-CURRENT #0: Wed Apr 2 08:26:57 EST 1997
toor@priapus.devetir.qld.gov.au:/usr/src/sys/compile/priapus
CPU: AMD Unknown (486-class CPU)
Origin = "AuthenticAMD" Id = 0x494 Stepping=4
Features=0x1<FPU>
real memory = 25165824 (24576K bytes)
avail memory = 22388736 (21864K bytes)
bdevsw_add_generic: adding D_DISK flag for device 15
Probing for devices on PCI bus 0:
chip0 <Host to PCI bridge (vendor=10b9 device=1489)> rev 0 on pci0:0:0
vga0 <VGA-compatible display device> rev 84 int a irq 9 on pci0:5:0
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
ed0 at 0x280-0x29f irq 10 maddr 0xd8000 msize 8192 on isa
ed0: address 00:00:c0:44:73:ec, type SMC8416T (16 bit)
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
pca0 on isa
pca0: PC speaker audio driver
wdc0 at 0x1f0-0x1f7 irq 14 flags 0x80ff80ff on isa
wdc0: unit 0 (wd0): <SAMSUNG SHD-3212A (APOLLO-4) AD>, 32-bit, multi-block-16
wd0: 407MB (833664 sectors), 1002 cyls, 16 heads, 52 S/T, 512 B/S
wdc0: unit 1 (wd1): <Conner Peripherals 850MB - CFA850A>, 32-bit, multi-block-32
wd1: 813MB (1665216 sectors), 1652 cyls, 16 heads, 63 S/T, 512 B/S
aha0 at 0x330-0x333 irq 11 drq 6 on isa
scbus0 at aha0 bus 0
sd0 at scbus0 target 0 lun 0
sd0: <MICROP 1684-07MB1036511 AS0C> type 0 fixed SCSI 1
sd0: Direct-Access 323MB (663476 512 byte sectors)
cd0 at scbus0 target 2 lun 0
cd0: <PIONEER CD-ROM DR-124X 1.00> type 5 removable SCSI 2
cd0: CD-ROM can't get the size
st0 at scbus0 target 4 lun 0
st0: <WANGTEK 51000 SCSI RVM7 5F5> type 1 removable SCSI 1
st0: Sequential-Access density code 0x0, drive empty
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 765
fd0: 1.44MB 3.5in
npx0 on motherboard
npx0: INT 16 interface
>Description:
Machine panics with "lockmgr: locking against myself"
Backtrace as follows -
#0 0xf010e73e in boot ()
#1 0xf010ea2a in panic ()
#2 0xf0109a87 in lockmgr ()
#3 0xf01af0f1 in ufs_lock ()
#4 0xf0136bb4 in vn_lock ()
#5 0xf0130c5b in vputrele ()
#6 0xf0130cbe in vrele ()
#7 0xf01be229 in vnode_pager_dealloc ()
#8 0xf01bd5a6 in vm_pager_deallocate ()
#9 0xf01b8e27 in vm_object_terminate ()
#10 0xf01b8c27 in vm_object_deallocate ()
#11 0xf0130b70 in vputrele ()
#12 0xf0130cbe in vrele ()
#13 0xf0106b8b in execve ()
#14 0xf01c9ec6 in syscall ()
#15 0x813ae71 in ?? ()
#16 0x1920 in ?? ()
#17 0x22ad in ?? ()
#18 0x1d97 in ?? ()
#19 0x1096 in ?? ()
>How-To-Repeat:
Use startx to start the Xserver, or have the Xserver started by xdm.
>Fix:
Unknown. (Why can't a process lock the same region repeatedly?)
--
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>Audit-Trail:
>Unformatted:
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