oops when catting info from /proc/bus/pnp/escd

oops when catting info from /proc/bus/pnp/escd

Post by Ruslan U. Zakiro » Mon, 16 Dec 2002 21:00:11



=> cat /proc/bus/pnp/escd
Then this oops.
Unable to handle kernel paging request at virtual address ffffa00a
=> Could someone explain me in a few words what does it mean "unable
=> to handle..." or point me on docs?
Dec 16 22:35:06 cubloid-pc kernel:  printing eip:
Dec 16 22:35:06 cubloid-pc kernel: 00007768
Dec 16 22:35:06 cubloid-pc kernel: *pde = 00001063
Dec 16 22:35:06 cubloid-pc kernel: *pte = 00000000
Dec 16 22:35:06 cubloid-pc kernel: Oops: 0000
Dec 16 22:35:06 cubloid-pc kernel: CPU:    0
Dec 16 22:35:06 cubloid-pc kernel: EIP:    0088:[<00007768>]    Not tainted
Dec 16 22:35:06 cubloid-pc kernel: EFLAGS: 00010086
Dec 16 22:35:06 cubloid-pc kernel: EIP is at 0x7768
Dec 16 22:35:06 cubloid-pc kernel: eax: 000022ff   ebx: 00a06816   ecx: 00000090   edx: 00000000
Dec 16 22:35:06 cubloid-pc kernel: esi: 0000000a   edi: 00000000   ebp: c202790f   esp: c2027e80
Dec 16 22:35:06 cubloid-pc kernel: ds: 00a0   es: 0098   ss: 0068
Dec 16 22:35:06 cubloid-pc kernel: Process cat (pid: 130, threadinfo=c2026000 task=c25a06e0)
Dec 16 22:35:06 cubloid-pc kernel: Stack: 000a0006 00a00000 00060098 7919774a 00000000 658a0090 682f7eb4 00680000
Dec 16 22:35:06 cubloid-pc kernel:        00000068 66840042 00960098 c2027efc 0080000b 00000042 00a00098 00000090
Dec 16 22:35:06 cubloid-pc kernel:        00000000 c01d6f2c 00000060 00000082 00000000 00000000 00000068 00000068
Dec 16 22:35:06 cubloid-pc kernel: Call Trace:
Dec 16 22:35:06 cubloid-pc kernel:  [<c01d6f2c>] __pnp_bios_read_escd+0xe0/0x128
=> In this func "__pnp_bios_read_escd" error occured? I think so, am I
=> right?
Dec 16 22:35:06 cubloid-pc kernel:  [<c01d6f85>] pnp_bios_read_escd+0x11/0x34
Dec 16 22:35:06 cubloid-pc kernel:  [<c01d8002>] proc_read_escd+0x66/0xfc
Dec 16 22:35:06 cubloid-pc kernel:  [<c015c577>] proc_file_read+0xb7/0x178
Dec 16 22:35:06 cubloid-pc kernel:  [<c0139033>] vfs_read+0xa7/0x108
Dec 16 22:35:06 cubloid-pc kernel:  [<c013927e>] sys_read+0x2a/0x40
Dec 16 22:35:06 cubloid-pc kernel:  [<c0108a67>] syscall_call+0x7/0xb
Dec 16 22:35:06 cubloid-pc kernel:
Dec 16 22:35:06 cubloid-pc kernel: Code:  Bad EIP value.

=> cat /proc/bus/pnp/escd_info
min_ESCD_write_size 8192
ESCD_size 3776
NVRAM_base 0xffffa000
=> We get this adress from call to another BIOS function, but may be
=> we have to allocate page or something else I don't know exactly
=> what. But I want to know more about it. And any suggextions or
=> explanations will be very good.
Beforehead Thanks to All.
                  Ruslan.

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1. PnPBIOS: cat /proc/bus/pnp/escd

        Hi;

        'cat /proc/bus/pnp/escd' consistantly produces this:

Paul

(need any more info, just ask)

Unable to handle kernel paging request at virtual address ffffd000
 printing eip:
00007b74
*pde = 00001063
*pte = 00000000
Oops: 0000
CPU:    0
EIP:    0088:[<00007b74>]    Not tainted
EFLAGS: 00010007
EIP is at 0x7b74
eax: 000000a0   ebx: 00a0d07b   ecx: 00000400   edx: 00000000
esi: 0000d000   edi: 00000000   ebp: c31e7eb0   esp: c31e7e88
ds: 00a0   es: 0098   ss: 0068
Process md5sum (pid: 25925, threadinfo=c31e6000 task=c7204640)
Stack: 00000000 0090d000 00907b89 d049d4eb 00000042 00680068 0246d016 00920098
       c31e7efc 0080000b 00000042 00a00098 00000090 00000000 c0217074 00000060
       00000082 00000000 00000000 00000068 00000068 00000246 00000042 c31e7efc
Call Trace:
 [<c0217074>] __pnp_bios_read_escd+0xf0/0x14c
 [<c02170df>] pnp_bios_read_escd+0xf/0x30
 [<c02180cf>] proc_read_escd+0x5f/0xf0
 [<c015dab5>] proc_file_read+0xb9/0x174
 [<c0138d27>] vfs_read+0xab/0x150
 [<c0138ff4>] sys_read+0x28/0x3c
 [<c010a7c7>] syscall_call+0x7/0xb

Code:  Bad EIP value.
 <6>note: cat[25925] exited with preempt_count 1
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