Date: Sun, 28 Nov 1999 14:28:12 +0200 (EET) From: netch@lucky.net (Valentin Nechayev) To: FreeBSD-gnats-submit@freebsd.org Subject: kern/15136: Panic on MSDOS FS mount Message-ID: <199911281228.dASCSCQ01254@nn.kiev.ua>
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>Number: 15136
>Category: kern
>Synopsis: Panic on MSDOS FS mount
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Nov 28 04:30:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator: Valentin Nechayev
>Release: FreeBSD 4.0-CURRENT i386
>Organization:
Lucky Net Ltd.
>Environment:
4.0-CURRENT i386
3.3-STABLE i386
>Description:
On attempt to mount MSDOS (FAT16) file system, kernel falls to panic with
message:
panic: vm_fault: fault on nofault entry, addr=c16de000
The effect is constant and appears on both 3.3-STABLE and 4.0-CURRENT.
Debugging says that fault is when fillinusemap() is in cycle with
cn == 51200 in code part (debug print is inserted by me) after first debug
print in following code before second one. Sorry but I cannot debug more
in depth of this problem just now.
==={
if (!bo || !bp) {
printf( "fillinusemap(%d): cn=%d\n", __LINE__, cn );
/* Read new FAT block */
if (bp)
brelse(bp);
fatblock(pmp, byteoffset, &bn, &bsize, NULL);
error = bread(pmp->pm_devvp, bn, bsize, NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
}
===}
The file system is on /dev/wd0s6, C/H/S location 570:0:1 - 773:254:63.
Its super block is:
begin 644 su.D
MZSR0;6MD;W-F<P```D`!``(``@``^,@`/P#_``````",`3(````ITKD8.$DQ
M-40@("`@("`@1D%4,38@("`.'[Y;?*PBP'0+5K0.NP<`S1!>Z_`RY,T6S1GK
M_E1H:7,@:7,@;F]T(&$@8F]O=&%B;&4@9&ES:RX@(%!L96%S92!I;G-E<G0@
M82!B;V]T86)L92!F;&]P<'D@86YD#0IP<F5S<R!A;GD@:V5Y('1O('1R>2!A
M9V%I;B`N+BX@#0H`````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
1````````````````````5:H`
`
end
None of other MSDOS filesystems on this disk cause such effect. Linux (RedHat
6.0), Win98 and MS-DOS all work with all local MSDOS partitions correctly.
Kernel config for 4.0-CURRENT is:
==={
machine i386
cpu I586_CPU
cpu I686_CPU
ident "nn5"
maxusers 32
makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
options INET #InterNETworking
options FFS #Berkeley Fast Filesystem
options FFS_ROOT #FFS usable as root device [keep this!]
options MFS #Memory Filesystem
options NFS #Network Filesystem
options MSDOSFS #MSDOS Filesystem
options CD9660 #ISO 9660 Filesystem
options CD9660_ROOT #CD-ROM usable as root. "CD9660" req'ed
options PROCFS #Process filesystem
options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
options SCSI_DELAY=5000
options USERCONFIG #boot -c editor
options VISUAL_USERCONFIG #visual boot -c editor
options INCLUDE_CONFIG_FILE
options KTRACE #ktrace(1) syscall trace support
options DDB
options SYSVSHM #SYSV-style shared memory
options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
controller isa0
controller pnp0 # PnP support for ISA
controller pci0
# Floppy drives
controller fdc0 at isa? port IO_FD1 irq 6 drq 2
device fd0 at fdc0 drive 0
# IDE controller and disks
controller wdc0 at isa? port IO_WD1 irq 14
device wd0 at wdc0 drive 0
device wd1 at wdc0 drive 1
# ATAPI devices on wdc?
device wcd0 #IDE CD-ROM
# atkbdc0 controls both the keyboard and the PS/2 mouse
controller atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1
device psm0 at atkbdc? irq 12
device vga0 at isa? port ? conflicts
# splash screen/screen saver
pseudo-device splash
# syscons is the default console driver, resembling an SCO console
device sc0 at isa?
# Floating point support - do not disable.
device npx0 at nexus? port IO_NPX irq 13
# Power management support (see LINT for more options)
device apm0 at nexus? flags 0x31 # Advanced Power Management
# Serial (COM) ports
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 irq 3
# Parallel port
device ppc0 at isa? port? flags 0x40 irq 7
controller ppbus0 # Parallel port bus (required)
device lpt0 # Printer
device plip0 # TCP/IP over parallel
device ppi0 # Parallel port interface device
#controller vpo0 # Requires scbus and da0
# Pseudo devices - the number indicates how many units to allocated.
pseudo-device loop # Network loopback
pseudo-device ether # Ethernet support
pseudo-device sl 1 # Kernel SLIP
pseudo-device ppp 1 # Kernel PPP
pseudo-device tun # Packet tunnel.
pseudo-device pty # Pseudo-ttys (telnet etc)
pseudo-device gzip # Exec gzipped a.out's
pseudo-device vn 2
pseudo-device disc
# The `bpf' pseudo-device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
pseudo-device bpf 2 #Berkeley packet filter
# USB support
controller uhci0 # UHCI PCI->USB interface
controller ohci0 # OHCI PCI->USB interface
controller usb0 # USB Bus (required)
device ugen0 # Generic
device uhid0 # "Human Interface Devices"
device ukbd0 # Keyboard
device ulpt0 # Printer
device ums0 # Mouse
options INVARIANTS
options INVARIANT_SUPPORT
options NETATALK #Appletalk communications protocols
#options NS #Xerox NS protocols
options IPFIREWALL #firewall
options IPFIREWALL_VERBOSE
options IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options IPPORTACL_V1
options IPPORTACL_V1_DEBUG=1
options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN
options TCP_RESTRICT_RST #restrict emission of TCP RST
options ICMP_BANDLIM
options DUMMYNET
#options DEVFS #devices filesystem
options QUOTA #enable disk quotas
options P1003_1B
options _KPOSIX_PRIORITY_SCHEDULING
options _KPOSIX_VERSION=199309L
pseudo-device speaker #Play IBM BASIC-style noises out your speaker
pseudo-device snp #Snoop device - to look at pty/vty/etc..
options MSGBUF_SIZE=81920
options SC_DFLT_FONT # compile font in
makeoptions SC_DFLT_FONT=koi8-r
options SC_HISTORY_SIZE=600 # number of history buffer lines
options SC_MOUSE_CHAR=0x3 # char code for text mode mouse cursor
options IDE_DELAY=5000 # Be optimistic about Joe IDE device
===}
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
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