Oops: How to read Oops ?

From: Guido Viehoff (viehoff@xmailer.cs.uni-bonn.de)
Date: Tue May 30 2000 - 08:00:38 EST


Hello,

how to read Oops-measages?
I try to locate the error caused this message:

kermit kernel: Robindevice: device_release(c6864ff0,c1c77840)
succeeded!
kermit kernel: Unable to handle kernel NULL pointer dereference at
virtual address 000001ff
kermit kernel: current->tss.cr3 = 00101000, %cr3 = 00101000
kermit kernel: *pde = 00000000
kermit kernel: Oops: 0000
kermit kernel: CPU: 0
kermit kernel: EIP: 0010:[robin+46/412]
kermit kernel: EFLAGS: 00010287
kermit kernel: eax: 020000e0 ebx: c17f87c8 ecx: 00000000 edx:
01f70000
kermit kernel: esi: 00000000 edi: c699e7c0 ebp: 7f01a8c0 esp:
c19cfe24
kermit kernel: ds: 0018 es: 0018 ss: 0018
kermit kernel: Process myProg (pid: 1090, process nr: 60,
stackpage=c19cf000)
kermit kernel: Stack: 020000e0 00000017 020000e0 c018d605 c17f87c8
c018d62b c699e7c0 c6693c80
kermit kernel: c67f4500 c09d8f60 00000001 c17f8160 c018d985
c0005c80 030201e0 00000017
kermit kernel: c6693c80 c018daca c6693c80 c40ba640 c19c8140
c018de58 c67f4500 030201e0
kermit kernel: Call Trace: [igmp_send_report+357/404]
[igmp_send_report+395/404] [igmp_group_dropped+117/124]
[ip_mc_dec_group+50/108] [ip_mc_drop_socket+44/72] [inet_release+39/120]
[sock_release+31/80]
kermit kernel: [sock_close+53/60] [__fput+31/72] [fput+23/72]
[filp_close+82/92] [do_exit+306/584] [do_signal+505/620]
[tty_write+370/436] [sys_socketcall+371/480]
kermit kernel: [signal_return+20/24]
kermit kernel: Code: 8a 86 ff 01 00 00 3c 06 74 04 3c 11 75 17 83 7c 24
10 00 74

I wrote a devicedriver to accept data from "myProg" and write then into
net-structures
of kernel. I try to locate the error, but don`t know how to use the
message above.

Thanks,

Guido

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