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Subjectpppd unload Oops
I was running `tcpdump -i ppp0` when pppd terminated the connection.

Here the Oops:

Ugh at c01117a8
Unable to handle kernel NULL pointer dereference at virtual address 00000004
current->tss.cr3 = 01d4a000, %cr3 = 01d4a000
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c014dc87>]
EFLAGS: 00010003
eax: 00000000 ebx: c0006520 ecx: 00000000 edx: 00000000
esi: c1d6a320 edi: c1d6a370 ebp: 00000000 esp: c1b2fe34
ds: 0018 es: 0018 ss: 0018
Process tcpdump (pid: 4367, process nr: 25, stackpage=c1b2f000)
Stack: 00000168 c1b2ff6c c2833ba4 00000168 c2833bf5 c1d6a320 00000000 00000000
c1b2fe74 c1b2fea4 c1fec284 c2833ba4 00000168 00000043 c0006520 c1d6a320
00000029 c0149f7c c1fec284 c1b2ff6c 00000168 00000000 c1b2fea4 c1fec284
Call Trace: [<c2833ba4>] [<c2833bf5>] [<c2833ba4>] [<c0149f7c>] [<c2833ba4>] [<c014b3bb>] [<c01840ce>]
[<c017bdfb>] [<c0182d23>] [<c017dda5>] [<c014beef>] [<c0109f4e>]
Code: 89 78 04 89 46 50 c7 03 00 00 00 00 c7 43 04 00 00 00 00 c7

Using `/System.map' to map addresses to symbols.

>>EIP: c014dc87 <skb_recv_datagram+167/1a4>
Trace: c2833ba4
Trace: c2833bf5
Trace: c2833ba4
Trace: c0149f7c <sock_recvmsg+3c/b4>
Trace: c2833ba4
Trace: c014b3bb <sys_recvfrom+10f/1c4>
Trace: c01840ce <con_put_char+1e/28>
Trace: c017bdfb <opost+1b3/1c0>
Trace: c0182d23 <con_flush_chars+1f/24>
Trace: c017dda5 <write_chan+169/224>
Trace: c014beef <sys_socketcall+1bb/248>
Trace: c0109f4e <system_call+3a/40>
Code: c014dc87 <skb_recv_datagram+167/1a4>
Code: c014dc87 <skb_recv_datagram+167/1a4> 89 78 04 movl %edi,0x4(%eax)
Code: c014dc8a <skb_recv_datagram+16a/1a4> 89 46 50 movl %eax,0x50(%esi)
Code: c014dc8d <skb_recv_datagram+16d/1a4> c7 03 00 00 00 movl $0x0,(%ebx)
Code: c014dc99 <skb_recv_datagram+179/1a4> c7 43 04 00 00 movl $0x0,0x4(%ebx)

Andrea[s] Arcangeli


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