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Date:      Tue, 28 Nov 1995 07:06:51 +0200
From:      Heikki Suonsivu <hsu@clinet.fi>
To:        FreeBSD-gnats-submit@freebsd.org
Subject:   kern/844: mbuf panic, dump available
Message-ID:  <199511280506.HAA03154@katiska.clinet.fi>
Resent-Message-ID: <199511280510.VAA02296@freefall.freebsd.org>

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>Number:         844
>Category:       kern
>Synopsis:       mbuf panic, dump available
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov 27 21:10:01 PST 1995
>Last-Modified:
>Originator:     Heikki Suonsivu
>Organization:
Clinet, Espoo, Finland
>Release:        FreeBSD 2.2-CURRENT i386
>Environment:

Nov 27 20:29:47 hauki /kernel: FreeBSD 2.2-CURRENT #2: Sun Nov 26 06:35:44 EET 1995
Nov 27 20:29:47 hauki /kernel:     hsu@katiska.clinet.fi:/usr/current/src/sys/compile/CLINETSERVER
Nov 27 20:29:48 hauki /kernel: CPU: 90-MHz Pentium 735\90 (Pentium-class CPU)
Nov 27 20:29:48 hauki /kernel:   Origin = "GenuineIntel"  Id = 0x525  Stepping=5
Nov 27 20:29:48 hauki /kernel:   Features=0x1bf<FPU,VME,PSE,MCE,CX8,APIC>
Nov 27 20:29:48 hauki /kernel: real memory  = 33554432 (32768K bytes)
Nov 27 20:29:48 hauki /kernel: avail memory = 30068736 (29364K bytes)
Nov 27 20:29:48 hauki /kernel: Probing for devices on the ISA bus:
Nov 27 20:29:48 hauki /kernel: vt0 at 0x60-0x6f irq 1 on motherboard
Nov 27 20:29:48 hauki /kernel: vt0: unkown s3, 80 col, color, 8 scr, mf2-kbd, [R3.20-b24]
Nov 27 20:29:48 hauki /kernel: ed0 not found at 0x280
Nov 27 20:29:48 hauki /kernel: lpt0 at 0x378-0x37f irq 7 on isa
Nov 27 20:29:49 hauki /kernel: lpt0: Interrupt-driven port
Nov 27 20:29:49 hauki /kernel: lp0: TCP/IP capable interface
Nov 27 20:29:49 hauki /kernel: lpt1 not found at 0xffffffff
Nov 27 20:29:49 hauki /kernel: lpt2 not found at 0xffffffff
Nov 27 20:29:49 hauki /kernel: sio0 at 0x3f8-0x3ff irq 4 on isa
Nov 27 20:29:49 hauki /kernel: sio0: type 16550A
Nov 27 20:29:49 hauki /kernel: sio1 at 0x2f8-0x2ff irq 3 on isa
Nov 27 20:29:49 hauki /kernel: sio1: type 16550A
Nov 27 20:29:49 hauki /kernel: sio2 not found at 0x3e8
Nov 27 20:29:49 hauki /kernel: sio3 not found at 0x2e8
Nov 27 20:29:49 hauki /kernel: pca0 on isa
Nov 27 20:29:50 hauki /kernel: pca0: PC speaker audio driver
Nov 27 20:29:50 hauki /kernel: bt0: Bt946C/ 0-PCI/EISA/VLB(32bit) bus
Nov 27 20:29:50 hauki /kernel: bt0: reading board settings, busmastering, int=11
Nov 27 20:29:50 hauki /kernel: bt0: version 4.23, sync, parity, 32 mbxs, 32 ccbs
Nov 27 20:29:50 hauki /kernel: bt0: targ 0 sync rate=10.00MB/s(100ns), offset=15
Nov 27 20:29:50 hauki /kernel: bt0: targ 2 sync rate=10.00MB/s(100ns), offset=15
Nov 27 20:29:50 hauki /kernel: bt0: Using Strict Round robin scheme
Nov 27 20:29:50 hauki /kernel: bt0 at 0x330 irq 11 on isa
Nov 27 20:29:50 hauki /kernel: bt0 waiting for scsi devices to settle
Nov 27 20:29:50 hauki /kernel: (bt0:0:0): "IBM 0662S12       !O 2 23" type 0 fixed SCSI 2
Nov 27 20:29:50 hauki /kernel: sd0(bt0:0:0): Direct-Access 1003MB (2055035 512 byte sectors)
Nov 27 20:29:50 hauki /kernel: sd0(bt0:0:0): with 4119 cyls, 5 heads, and an average 99 sectors/track
Nov 27 20:29:50 hauki /kernel: (bt0:2:0): "IBM OEM 0662S12 3 30" type 0 fixed SCSI 2
Nov 27 20:29:51 hauki /kernel: sd2(bt0:2:0): Direct-Access 1003MB (2055035 512 byte sectors)
Nov 27 20:29:51 hauki /kernel: sd2(bt0:2:0): with 4119 cyls, 5 heads, and an average 99 sectors/track
Nov 27 20:29:51 hauki /kernel: aha0 not probed due to I/O address conflict with bt0 at 0x330
Nov 27 20:29:51 hauki /kernel: wdc0 not found at 0x1f0
Nov 27 20:29:51 hauki /kernel: fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
Nov 27 20:29:51 hauki /kernel: fdc0: NEC 72065B
Nov 27 20:29:51 hauki /kernel: fd0: 1.44MB 3.5in
Nov 27 20:29:51 hauki /kernel: mcd0: timeout getting status
Nov 27 20:29:51 hauki /kernel: mcd0 not found at 0x300
Nov 27 20:29:51 hauki /kernel: npx0 on motherboard
Nov 27 20:29:51 hauki /kernel: npx0: INT 16 interface
Nov 27 20:29:51 hauki /kernel: matcdc0 not found at 0xffffffff
Nov 27 20:29:51 hauki /kernel: matcdc1 not found at 0xffffffff
Nov 27 20:29:52 hauki /kernel: matcdc2 not found at 0xffffffff
Nov 27 20:29:52 hauki /kernel: matcdc3 not found at 0xffffffff
Nov 27 20:29:52 hauki /kernel: Probing for devices on the PCI bus:
Nov 27 20:29:52 hauki /kernel: pci0:0: Silicon Integrated Systems, device=0x5511, class=bridge (host) [no driver assigned]
Nov 27 20:29:52 hauki /kernel: chip0 <SiS 85c503> rev 1 on pci0:1
Nov 27 20:29:52 hauki /kernel: vga0 <VGA-compatible display device> rev 0 int a irq 12 on pci0:9
Nov 27 20:29:52 hauki /kernel: chip1 <DEC 21050 PCI-PCI bridge> rev 2 on pci0:10
Nov 27 20:29:52 hauki /kernel: pci0:11: Bus Logic, device=0x1040, class=storage (scsi) [no driver assigned]
Nov 27 20:29:52 hauki /kernel: Probing for devices on the PCI bus:
Nov 27 20:29:52 hauki /kernel: de0 <Digital DC21040 Ethernet> rev 35 int a irq 10 on pci1:4
Nov 27 20:29:52 hauki /kernel: de0: DC21040 [10Mb/s] pass 2.3 Ethernet address 00:00:c0:50:01:c0
Nov 27 20:29:52 hauki /kernel: de0: enabling Thinwire/AUI port
Nov 27 20:29:52 hauki /kernel: de1 <Digital DC21040 Ethernet> rev 35 int a irq 12 on pci1:5
Nov 27 20:29:53 hauki /kernel: de1: DC21040 [10Mb/s] pass 2.3 Ethernet address 00:00:c0:1e:02:c0
Nov 27 20:29:53 hauki /kernel: de1: enabling Thinwire/AUI port
Nov 27 20:29:53 hauki /kernel: changing root device to sd0a
Nov 27 20:29:53 hauki /kernel: new masks: bio c0000840, tty c003009a, net c003149a
Nov 27 20:29:53 hauki /kernel: WARNING: / was not properly dismounted.
Nov 27 20:29:53 hauki /kernel: sd2: raw partition size != slice size
Nov 27 20:29:53 hauki /kernel: sd2: start 0, end 2055034, size 2055035
Nov 27 20:29:53 hauki /kernel: sd2c: start 0, end 2038904, size 2038905

>Description:

	mbuf panic, best documented in the crash dump.  against sup from
	around 26th Nov 17:00 GMT.  The dump is available in
	ftp://clinet.fi/pub/FreeBSD/crashdumps/{kernel,vmcore}.1.gz

This could be related to


Nov 27 18:41:13 hauki /kernel: Probing for devices on the PCI bus:
Nov 27 18:41:13 hauki /kernel: de0 <Digital DC21040 Ethernet> rev 35 int a irq 1
0 on pci1:4
Nov 27 18:41:13 hauki /kernel: Data modified on freelist: word 0 of object 0xf0d
40a00 size 256 previous type free (0x9a0328 != 0xdeadc0de)
Nov 27 18:41:13 hauki /kernel: de0: DC21040 [10Mb/s] pass 2.3 Ethernet address 0
0:00:c0:50:01:c0
Nov 27 18:41:13 hauki /kernel: de0: enabling Thinwire/AUI port
Nov 27 18:41:13 hauki /kernel: de1 <Digital DC21040 Ethernet> rev 35 int a irq 1
2 on pci1:5
Nov 27 18:41:13 hauki /kernel: de1: DC21040 [10Mb/s] pass 2.3 Ethernet address 0
0:00:c0:1e:02:c0

I have seen these occasionally in a running system, but this is the first
time I see one within boot messages.

>How-To-Repeat:

	I don't know (relates to my previous report, this is the only dump
	which actually made it to the disk, others were lost in panic
	before savecore completed).

>Fix:
	
	Don't know, but data structure being freed contains 0xdeadc0de
	data...


>Audit-Trail:
>Unformatted:



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