Kernel crash after floppy mount - help needed
Here's what happens.
I have a DOS or Linux floppy I mount via: mount /dev/fd0 /mnt
or fdmount fd0 /mnt
That works fine.
But, when I type: cd /mnt I get the following every time. If I'm
logged in as root I return to the prompt. If I am logged in anyone
else I am logged out.
The only way I can find to escape this is to reboot.
Here's a little more info:
debian:~> dmesg
Linux version 2.4.19 (root@debian) (gcc version 3.2) #4 Wed Nov 6
08:13:13 EST 2
002
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000003000000 (usable)
BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
48MB LOWMEM available.
On node 0 totalpages: 12288
zone(0): 4096 pages.
zone(2): 0 pages.es.
Kernel command line: auto BOOT_IMAGE=Linux ro root=301
Initializing CPU#0
Detected 100.228 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 199.88 BogoMIPS
Memory: 46484k/49152k available (1027k kernel code, 2284k reserved,
245k data, 2
24k init, 0k highmem)
Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
Inode cache hash table entries: 4096 (order: 3, 32768 bytes)
Mount-cache hash table entries: 1024 (order: 1, 8192 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 bytes)
CPU: Before vendor init, caps: 000001bf 00000000 00000000, vendor = 0
Intel Pentium with F0 0F bug - workaround enabled.
CPU: After vendor init, caps: 000001bf 00000000 00000000 00000000
CPU: After generic, caps: 000001bf 00000000 00000000 00000000
CPU: Common caps: 000001bf 00000000 00000000 00000000
CPU: Intel Pentium 75 - 200 stepping 06
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.40 (20010327) Richard Gooch (rgooch@atnf.csiro.au)
mtrr: detected mtrr type: none
PCI: PCI BIOS revision 2.10 entry at 0xfb200, last bus=0
PCI: Using configuration type 1
PCI: Probing PCI hardware
Limiting direct PCI/PCI transfers.
Activating ISA DMA hang workarounds.
isapnp: Scanning for PnP cards...
isapnp: SB audio device quirk - increasing port range
isapnp: AWE32 quirk - adding two ports
isapnp: Card 'Creative SB AWE32 PnP'
isapnp: Card 'U.S.Robotics x2 Winmodem Voice'
isapnp: 2 Plug & Play cards detected total
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
NTFS driver v1.1.22 [Flags: R/O]
pty: 256 Unix98 ptys configured
further down...
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
Actual error is:
Unable to handle kernel NULL pointer dereference at virtual address
00000028
printing eip:
c013fc32
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c013fc32>] Not tainted
EFLAGS: 00010293
eax: 00000000 ebx: 3dcbbc8b ecx: c1a85420 edx: c19509e0
esi: c19de000 edi: c19dff8c ebp: c1a85420 esp: c19dff14
ds: 0018 es: 0018 ss: 0018
Process ls (pid: 356, stackpage=c19df000)
Stack: c19509e0 c013694a c1a85420 00000000 c11ce000 c19dff8c 00018801
00000001
00000003 c11ce004 c19509e0 c11ce001 00000003 00295e98 c0136ac6
c0136f84
00018800 c11ce000 080567c8 bffffc1c 00000200 00000000 00000004
00000000
Call Trace: [<c013694a>] [<c0136ac6>] [<c0136f84>] [<c012d55b>]
[<c012d8a6>]
[<c0108813>]
Code: 8b 50 28 f6 c6 04 75 30 f6 81 0c 01 00 00 02 75 27 f6 c6 08
<1>Unable to handle kernel NULL pointer dereference at virtual
address 00000028
Nov 8 08:30:51 debian kernel: printing eip:
Nov 8 08:30:51 debian kernel: c013fc32
Nov 8 08:30:51 debian kernel: Oops: 0000
Nov 8 08:30:51 debian kernel: CPU: 0
Nov 8 08:30:51 debian kernel: EIP: 0010:[update_atime+22/80]
Not tainted
Nov 8 08:30:51 debian kernel: EFLAGS: 00010293
Nov 8 08:30:51 debian kernel: eax: 00000000 ebx: 3dcbbc8b ecx:
c1a85420 e
dx: c19509e0
Nov 8 08:30:51 debian kernel: esi: c19de000 edi: c19dff8c ebp:
c1a85420 e
sp: c19dff14
Nov 8 08:30:51 debian kernel: ds: 0018 es: 0018 ss: 0018
Nov 8 08:30:51 debian kernel: Process ls (pid: 356,
stackpage=c19df000)
Nov 8 08:30:51 debian kernel: Stack: c19509e0 c013694a c1a85420
00000000 c11ce0
00 c19dff8c 00018801 00000001
Nov 8 08:30:51 debian kernel: 00000003 c11ce004 c19509e0
c11ce001 000000
03 00295e98 c0136ac6 c0136f84
Nov 8 08:30:51 debian kernel: 00018800 c11ce000 080567c8
bffffc1c 000002
00 00000000 00000004 00000000
Nov 8 08:30:51 debian kernel: Call Trace:
[link_path_walk+1778/2132] [path_w
alk+26/28] [open_namei+116/1272] [filp_open+51/84] [sys_open+54/132]
Nov 8 08:30:51 debian kernel: [system_call+51/64]
Nov 8 08:30:51 debian kernel:
Nov 8 08:30:51 debian kernel: Code: 8b 50 28 f6 c6 04 75 30 f6 81 0c
01 00 00 0
2 75 27 f6 c6 08
Nov 8 08:31:46 debian kernel: <1>Unable to handle kernel NULL
pointer derefere
nce at virtual address 00000028
Nov 8 08:31:46 debian kernel: printing eip:
Nov 8 08:31:46 debian kernel: c013fc32
Nov 8 08:31:46 debian kernel: Oops: 0000
Nov 8 08:31:46 debian kernel: CPU: 0
Nov 8 08:31:46 debian kernel: EIP: 0010:[update_atime+22/80]
Not tainted
Nov 8 08:31:46 debian kernel: EFLAGS: 00010293
Nov 8 08:31:46 debian kernel: eax: 00000000 ebx: 3dcbbcc2 ecx:
c1a85420 e
dx: c19509e0
Nov 8 08:31:46 debian kernel: esi: c19de000 edi: c19dffa4 ebp:
c1a85420 e
sp: c19dff48
Nov 8 08:31:46 debian kernel: ds: 0018 es: 0018 ss: 0018
Nov 8 08:31:46 debian kernel: Process fdumount (pid: 360,
stackpage=c19df000)
Nov 8 08:31:46 debian kernel: Stack: c19509e0 c013694a c1a85420
c26fd000 000000
00 c19dffa4 00000009 00000001
Nov 8 08:31:46 debian kernel: 00000009 c26fd004 c19509e0
c26fd001 000000
03 00295e98 c0136ac6 c0136e51
Nov 8 08:31:46 debian kernel: c19de000 c19dffa4 0804e910
bffffb9c c0133f
41 c19de000 0804e910 c10b77a0
Nov 8 08:31:46 debian kernel: Call Trace:
[link_path_walk+1778/2132] [path_w
alk+26/28] [__user_walk+53/80] [sys_stat64+25/120] [system_call+51/64]
Nov 8 08:31:46 debian kernel:
Nov 8 08:31:46 debian kernel: Code: 8b 50 28 f6 c6 04 75 30 f6 81 0c
01 00 00 0
2 75 27 f6 c6 08
debian:~>
Please help.
Thanks.
Scott
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