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Date:      Thu, 7 Mar 1996 02:47:30 +0200 (EET)
From:      Heikki Suonsivu <hsu@clinet.fi>
To:        FreeBSD-gnats-submit@freebsd.org
Subject:   kern/1067: panic: ufs_lock: recursive lock not expected, pid: 27195
Message-ID:  <199603070047.CAA01586@zetor.clinet.fi>
Resent-Message-ID: <199603070050.QAA15687@freefall.freebsd.org>

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>Number:         1067
>Category:       kern
>Synopsis:       panic: ufs_lock: recursive lock not expected, pid: 27195
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Mar  6 16:50:02 PST 1996
>Last-Modified:
>Originator:     Heikki Suonsivu
>Organization:
Clinet, Espoo, Finland
>Release:        FreeBSD 2.2-CURRENT i386
>Environment:

	-current

Mar  6 18:46:27 cantina /kernel: FreeBSD 2.2-CURRENT #16: Thu Feb 22 22:38:14 EET 1996
Mar  6 18:46:28 cantina /kernel:     hsu@news.clinet.fi:/usr/current/src/sys/compile/CLINETSERVER
Mar  6 18:46:28 cantina /kernel: CPU: Pentium (132.61-MHz 586-class CPU)
Mar  6 18:46:28 cantina /kernel:   Origin = "GenuineIntel"  Id = 0x52b  Stepping=11
Mar  6 18:46:28 cantina /kernel:   Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
Mar  6 18:46:28 cantina /kernel: real memory  = 67108864 (65536K bytes)
Mar  6 18:46:28 cantina /kernel: avail memory = 63606784 (62116K bytes)
Mar  6 18:46:28 cantina /kernel: DEVFS: ready for devices
Mar  6 18:46:28 cantina /kernel: Probing for devices on PCI bus 0:
Mar  6 18:46:28 cantina /kernel: chip0 <Intel 82437 (Triton) PCI cache memory controller> rev 2 on pci0:0
Mar  6 18:46:28 cantina /kernel: chip1 <Intel 82371 (Triton) PCI-ISA bridge> rev 2 on pci0:7
Mar  6 18:46:28 cantina /kernel: piix0 <Intel 82371 (Triton) Bus-master IDE controller> rev 2 on pci0:7
Mar  6 18:46:28 cantina /kernel: de0 <Digital DC21040 Ethernet> rev 35 int a irq 10 on pci0:10
Mar  6 18:46:28 cantina /kernel: de0: DC21040 [10Mb/s] pass 2.3 Ethernet address 00:c0:95:ec:56:84
Mar  6 18:46:29 cantina /kernel: de0: enabling Thinwire/AUI port
Mar  6 18:46:29 cantina /kernel: ncr0 <ncr 53c810 scsi> rev 2 int a irq 11 on pci0:12
Mar  6 18:46:29 cantina /kernel: ncr0 waiting for scsi devices to settle
Mar  6 18:46:29 cantina /kernel: (ncr0:0:0): "IBM DPES-31080 S31Q" type 0 fixed SCSI 2
Mar  6 18:46:29 cantina /kernel: sd0(ncr0:0:0): Direct-Access 
Mar  6 18:46:29 cantina /kernel: sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
Mar  6 18:46:29 cantina /kernel: 1034MB (2118144 512 byte sectors)
Mar  6 18:46:29 cantina /kernel: sd0(ncr0:0:0): with 4903 cyls, 4 heads, and an average 108 sectors/track
Mar  6 18:46:29 cantina /kernel: Probing for devices on the ISA bus:
Mar  6 18:46:29 cantina /kernel: vt0 at 0x60-0x6f irq 1 on motherboard
Mar  6 18:46:29 cantina /kernel: vt0: tvga 8900cl, 80/132 col, color, 8 scr, mf2-kbd, [R3.20-b24]
Mar  6 18:46:29 cantina /kernel: ed0 not found at 0x280
Mar  6 18:46:29 cantina /kernel: lpt0 at 0x378-0x37f irq 7 on isa
Mar  6 18:46:29 cantina /kernel: lpt0: Interrupt-driven port
Mar  6 18:46:29 cantina /kernel: lp0: TCP/IP capable interface
Mar  6 18:46:29 cantina /kernel: lpt1 not found at 0xffffffff
Mar  6 18:46:29 cantina /kernel: sio0 at 0x3f8-0x3ff irq 4 on isa
Mar  6 18:46:29 cantina /kernel: sio0: type 16550A
Mar  6 18:46:29 cantina /kernel: sio1 at 0x2f8-0x2ff irq 3 on isa
Mar  6 18:46:29 cantina /kernel: sio1: type 16550A
Mar  6 18:46:29 cantina /kernel: cy0 not found
Mar  6 18:46:29 cantina /kernel: bt0 not found at 0x330
Mar  6 18:46:29 cantina /kernel: aha0 not found at 0x330
Mar  6 18:46:30 cantina /kernel: wdc0 not found at 0x1f0
Mar  6 18:46:30 cantina /kernel: fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
Mar  6 18:46:30 cantina /kernel: fdc0: NEC 72065B
Mar  6 18:46:30 cantina /kernel: fd0: 1.44MB 3.5in
Mar  6 18:46:30 cantina /kernel: matcdc0 not found at 0x230
Mar  6 18:46:30 cantina /kernel: npx0 on motherboard
Mar  6 18:46:30 cantina /kernel: npx0: INT 16 interface
Mar  6 18:46:30 cantina /kernel: changing root device to sd0a
Mar  6 18:46:30 cantina /kernel: devfs ready to run
Mar  6 18:46:31 cantina /kernel: new masks: bio c0000840, tty c003049a, net c003049a
Mar  6 18:46:31 cantina /kernel: WARNING: / was not properly dismounted.

>Description:

	Mounting a directory on itself panics the system.

mount /m/katiska/local /m/katiska/local

Mar  6 18:46:26 cantina /kernel: panic: ufs_lock: recursive lock not expected, pid: 27195
Mar  6 18:46:27 cantina /kernel: 
Mar  6 18:46:27 cantina /kernel: 
Mar  6 18:46:27 cantina /kernel: syncing disks... 21 21 14 8 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 giving up
Mar  6 18:46:27 cantina /kernel: 1: dev:ffffffff, flags:21000014, blkno:1648, lblkno:103
Mar  6 18:46:27 cantina /kernel: 2: dev:ffffffff, flags:21000034, blkno:896, lblkno:56
Mar  6 18:46:27 cantina /kernel: 3: dev:ffffffff, flags:21000034, blkno:448, lblkno:28
Mar  6 18:46:27 cantina /kernel: 4: dev:ffffffff, flags:21000034, blkno:0, lblkno:0
Mar  6 18:46:27 cantina /kernel: 
Mar  6 18:46:27 cantina /kernel: dumping to dev 401, offset 0
Mar  6 18:46:27 cantina /kernel: dump 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 succeeded
Mar  6 18:46:27 cantina /kernel: Automatic reboot in 15 seconds - press a key on the console to abort
Mar  6 18:46:27 cantina /kernel: Rebooting...

ftp://ftp.clinet.fi/pub/FreeBSD/cantina/*.1.gz

>How-To-Repeat:

	mount /m/katiska/local /m/katiska/local

	where /m/katiska/local is a directory (intended mount point,
	"machine:" was missing).

>Fix:
	

>Audit-Trail:
>Unformatted:



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