Date: Fri, 3 Apr 1998 10:45:05 -0800 (PST) From: dima@best.net To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/6203: panic: blkfree: freeing free frag Message-ID: <199804031845.KAA07538@burka.rdy.com>
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>Number: 6203
>Category: kern
>Synopsis: kernel panics with "blkfree: freeing free frag" message.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Apr 3 10:50:01 PST 1998
>Last-Modified:
>Originator: Dima Ruban
>Organization:
Best Internet Communications, Inc.
>Release: FreeBSD 2.2.6-STABLE i386
>Environment:
# dmesg
Copyright (c) 1992-1998 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.6-STABLE #36: Fri Mar 27 12:05:22 PST 1998
dima@tick.best.net:/src/src/sys/compile/BEST
CPU: Pentium Pro (199.31-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x619 Stepping=9
Features=0xf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV>
real memory = 201326592 (196608K bytes)
avail memory = 186765312 (182388K bytes)
Probing for devices on PCI bus 0:
chip0 <Intel 82440FX (Natoma) PCI and memory controller> rev 2 on pci0:0:0
chip1 <Intel 82371SB PCI-ISA bridge> rev 1 on pci0:1:0
chip2 <Intel 82371SB IDE interface> rev 0 on pci0:1:1
vga0 <VGA-compatible display device> rev 211 int a irq 12 on pci0:10:0
de0 <Digital 21140 Fast Ethernet> rev 18 int a irq 10 on pci0:11:0
de0: SMC 9332DST 21140 [10-100Mb/s] pass 1.2
de0: address 00:00:c0:91:42:dc
de0: enabling 10baseT port
ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 11 on pci0:12:0
ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
ahc0 waiting for scsi devices to settle
ahc0: target 0 Tagged Queuing Device
(ahc0:0:0): "SEAGATE ST34371W 0338" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 4148MB (8496960 512 byte sectors)
sd0(ahc0:0:0): with 5168 cyls, 10 heads, and an average 164 sectors/track
ahc0: target 1 Tagged Queuing Device
(ahc0:1:0): "SEAGATE ST19171W 0023" type 0 fixed SCSI 2
sd1(ahc0:1:0): Direct-Access 8683MB (17783112 512 byte sectors)
sd1(ahc0:1:0): with 5268 cyls, 20 heads, and an average 168 sectors/track
ahc0: target 2 Tagged Queuing Device
(ahc0:2:0): "SEAGATE ST19171W 0023" type 0 fixed SCSI 2
sd2(ahc0:2:0): Direct-Access 8683MB (17783112 512 byte sectors)
sd2(ahc0:2:0): with 5268 cyls, 20 heads, and an average 168 sectors/track
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
npx0 on motherboard
npx0: INT 16 interface
ccd0-1: Concatenated disk drivers
de0: enabling 10baseT port
#
>Description:
I don't believe, I've seen it here before. Here goes ddb trace:
dev = 0x413, block = 3432, fs = /users/u2
panic: blkfree: freeing free frag
Debugger("panic")
Stopped at _Debugger+0x35 [/sys/compile/BEST/:52]: movb
$0,_in_Debugger.
122
db>
db> trace
_Debugger(msg=f0113238) at _Debugger+0x35 [/sys/compile/BEST/:52]
_panic(fmt=f0196671) at _panic+0x5a [/sys/compile/BEST/:388]
_ffs_blkfree(ip=f2623200,bno=d68,size=800) at _ffs_blkfree+0x410
[/sys/compile/B
EST/:1257]
_ffs_truncate(ap=efbffe9c) at _ffs_truncate+0x9a7 [/sys/compile/BEST/:344]
_ufs_setattr(ap=efbffed4) at _ufs_setattr+0x1bb [/sys/compile/BEST/:1003]
_ftruncate(p=f2d1d800,uap=efbfff94,retval=efbfff84) at _ftruncate+0xfd
[/sys/com
pile/BEST/:227]
_syscall(frame=27) at _syscall+0x183 [/sys/compile/BEST/:914]
_Xsyscall() at _Xsyscall+0x35
--- syscall 0xc6, eip = 0x20092ee5, esp = 0xefbfca60, ebp = 0xefbfca80 ---
db> panic
panic: from debugger
dumping to dev 401, offset 655360
...
Unfortunately it didn't leave a dump, so back trace from ddb
is basically all I have.
>How-To-Repeat:
I have no idea.
>Fix:
None at the time.
>Audit-Trail:
>Unformatted:
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