Re: linux kernel v2.4.0-test7 problems

From: Michael H. Warfield (mhw@wittsend.com)
Date: Fri Aug 25 2000 - 12:08:24 EST


Dave,

On Thu, Aug 24, 2000 at 11:58:15PM -0700, David S. Miller wrote:
> Date: Fri, 25 Aug 2000 10:06:31 +0300 (EEST)
> From: Ahmed El-Mahmoudy <ant1@ants.net.dhis.org>

> 1. When I compiled IPv6 INSIDE the kernel, the kernel crashes at startup.

> Can you please send a ksymoops processed OOPS log of
> the crash?

        Here is the original Oops and the ksymoops processed output from
one of my IPv6 crash on boot.

===== oops.test7
NET4: Unix domain scokets 1.0/SMP for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 8192 bind 8192)
IPv6 v0.8 for NET4.0
Unable to handle kernel NULL pointer dereference at virtual address 0000001c
 printing eip:
c0200508
*pde = 00000000
Opps: 0000
CPU: 0
EIP: 0010:[<c0200508>]
EFLAGS: 00010286
eax: 00000000 ebx: c02d0fcc ecx: c7ff4340 edx: c7ff0000
esi: c02d7fdc edi: c0105000 ebp: 0008e000 esp: c7ff1fbc
ds: 0018 esi: 0018 ss: 0018
Process swapper (pid: 1, stackpaege = c7ff1000)
Stack: c02d0fcc c02e6f16 c02d0fcc c02e6b57 c02d3a40 c02e5c16 c02d0fcc 00000f00
       c02e5c6c c02d8b93 c0107007 00000f00 c02d7fdc c0107437 00000000 00007ffc
       00098800
Call Trace: [<c0107007>] [<c0107437>]
Code: 8b 40 1c 66 c7 41 22 ff c1 c6 81 d0 00 00 00 01 89 81 84 00
Kernel Panic: Attempting to kill init!
===== oops.test7

===== oops.ksym
ksymoops 2.3.4 on i586 2.4.0-test7. Options used
     -v /usr/src/linux/vmlinux (specified)
     -K (specified)
     -L (specified)
     -o /lib/modules/2.4.0-test7/ (default)
     -m /usr/src/linux/System.map (default)

No modules in ksyms, skipping objects
Unable to handle kernel NULL pointer dereference at virtual address 0000001c
c0200508
*pde = 00000000
CPU: 0
EIP: 0010:[<c0200508>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: 00000000 ebx: c02d0fcc ecx: c7ff4340 edx: c7ff0000
esi: c02d7fdc edi: c0105000 ebp: 0008e000 esp: c7ff1fbc
ds: 0018 esi: 0018 ss: 0018
Stack: c02d0fcc c02e6f16 c02d0fcc c02e6b57 c02d3a40 c02e5c16 c02d0fcc 00000f00
       c02e5c6c c02d8b93 c0107007 00000f00 c02d7fdc c0107437 00000000 00007ffc
       00098800
Call Trace: [<c0107007>] [<c0107437>]
Code: 8b 40 1c 66 c7 41 22 ff c1 c6 81 d0 00 00 00 01 89 81 84 00

>>EIP; c0200508 <sock_alloc+1c/a8> <=====
Trace; c0107007 <init+7/150>
Trace; c0107437 <kernel_thread+23/30>
Code; c0200508 <sock_alloc+1c/a8>
00000000 <_EIP>:
Code; c0200508 <sock_alloc+1c/a8> <=====
   0: 8b 40 1c movl 0x1c(%eax),%eax <=====
Code; c020050b <sock_alloc+1f/a8>
   3: 66 c7 41 22 ff c1 movw $0xc1ff,0x22(%ecx)
Code; c0200511 <sock_alloc+25/a8>
   9: c6 81 d0 00 00 00 01 movb $0x1,0xd0(%ecx)
Code; c0200518 <sock_alloc+2c/a8>
  10: 89 81 84 00 00 00 movl %eax,0x84(%ecx)

Kernel Panic: Attempting to kill init!
===== oops.ksym

> Without this information, the bug cannot be fixed.

        [...]

> Thanks.

> Later,
> David S. Miller
> davem@redhat.com

        Mike

-- 
 Michael H. Warfield    |  (770) 985-6132   |  mhw@WittsEnd.com
  (The Mad Wizard)      |  (678) 463-0932   |  http://www.wittsend.com/mhw/
  NIC whois:  MHW9      |  An optimist believes we live in the best of all
 PGP Key: 0xDF1DD471    |  possible worlds.  A pessimist is sure of it!

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