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Subjectdcache-related Oops in 2.1.45 (following orphaned symlink)
Hello,

cpp tried to open /usr/include/linux/header.gcc, but /usr/src/linux had
been moved away.

Unable to handle kernel NULL pointer dereference at virtual address 00000006
current->tss.cr3 = 01b92000, %cr3 = 01b92000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c01296f9>]
EFLAGS: 00010202
eax: fffffffe ebx: c1f57768 ecx: c1892ec8 edx: c1e6e108
esi: c0fad013 edi: fffffffe ebp: 00000001 esp: c1b91f2c
ds: 0018 es: 0018 ss: 0018
Process cpp (pid: 745, process nr: 63, stackpage=c1b91000)
Stack: c1f57780 000001b6 00000001 000081a4 00000005 006af92f fffffffe c0fad00d
00000005 006af928 c0129863 c0fad000 00000000 00000001 c1f57780 000001b6
c0fad000 000001b6 fffffffe 00003000 c012222f c0fad000 00000001 000001b6
Call Trace: [<c0129863>] [<c012222f>] [<c01223e3>] [<c010944a>]
Code: 83 7f 08 00 0f 84 89 00 00 00 89 74 24 1c 31 c0 c7 44 24 10

Using `/kernel/2.1.45.4.map' to map addresses to symbols.

>>EIP: c01296f9 <lookup_dentry+79/128>
Trace: c0129863 <open_namei+3f/2b0>
Trace: c012222f <do_open+4b/134>
Trace: c01223e3 <sys_open+3b/6c>
Trace: c010944a <system_call+3a/40>

Code: c01296f9 <lookup_dentry+79/128>
Code: c01296f9 <lookup_dentry+79/128> 83 7f 08 00 cmpl $0x0,0x8(%edi)
Code: c01296fd <lookup_dentry+7d/128> 0f 84 89 00 00 je c012978c <lookup_dentry+10c/128>
Code: c0129702 <lookup_dentry+82/128> 00
Code: c0129709 <lookup_dentry+89/128> 89 74 24 1c movl %esi,0x1c(%esp,1)
Code: c012970d <lookup_dentry+8d/128> 31 c0 xorl %eax,%eax
Code: c012970f <lookup_dentry+8f/128> c7 44 24 10 00 movl $0x90909000,0x10(%esp,1)
Code: c012971a <lookup_dentry+9a/128> 90 90 90

That's the start of the "for" look in lookup_dentry.

Vanilla 2.1.45.

Regards, Uwe


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