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Unable to handle kernel NULL pointer dereference at virtual address 00000324

2.6.0-test1 Ramón Rey Vicente󮠒 2 participants 3 messages Jul 21, 2003

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Ramón Rey Vicente󮠒

author
#0 lore raw

Hello.

With test1 and the bitkeeper changesets until yesterday, I obtain this

Unable to handle kernel NULL pointer dereference at virtual address

00000324
printing eip:
c01605a9
*pde = 00000000

Oops: 0000 [#1]
CPU:    0
EIP:    0060:[<c01605a9>]    Not tainted
EFLAGS: 00010206

EIP is at iput+0x9/0x80
eax: 00000000 ebx: 00000200 ecx: caab2664 edx: caab2664
esi: 00000200 edi: c13e4000 ebp: 00000061 esp: c13e5e88
ds: 007b es: 007b ss: 0068
Process kswapd0 (pid: 8, threadinfo=c13e4000 task=c13eac60)

Stack: caab2640 c015ddf3 00000200 00000080 c13e4000 00000041 cfffeba0
c015e273 
       00000080 c0138968 00000080 000000d0 0000d4c8 01e04b6c 00000000
00000241 
       00000000 0000035a c027826c fffffffd 00000001 c0139abe 0000035a
000000d0 
Call Trace:
 [<c015ddf3>] prune_dcache+0x153/0x1a0
 [<c015e273>] shrink_dcache_memory+0x33/0x40
 [<c0138968>] shrink_slab+0x108/0x160
 [<c0139abe>] balance_pgdat+0x15e/0x180
 [<c0139be6>] kswapd+0x106/0x120
 [<c01180a0>] autoremove_wake_function+0x0/0x40
 [<c0108d96>] ret_from_fork+0x6/0x20
 [<c01180a0>] autoremove_wake_function+0x0/0x40
 [<c0139ae0>] kswapd+0x0/0x120
 [<c0106fe5>] kernel_thread_helper+0x5/0x20

Code: 83 bb 24 01 00 00 20 8b 83 80 00 00 00 8b 40 24 74 4b 85 c0
Signature · 9 lines
/================================================\
| Ramón Rey Vicente <ramon.rey at hispalinux.es> |
|                                                |
| Jabber ID <rreylinux at jabber.org>            |
|                                                |
| Public GPG Key http://pgp.escomposlinux.org    |
|                                                |
| GLiSa http://glisa.hispalinux.es               |
\================================================/
#1 lore raw

That is the exact same Oops I get. I wasunable to catpure or print it because the kernel locks up.

How were you are ble catch the Oops message if yoru system froze?

--- Ramón Rey Vicente ó® ’ <[email protected]>

Quoted 45 lines · wrote:

Hello.

With test1 and the bitkeeper changesets until
yesterday, I obtain this

Unable to handle kernel NULL pointer dereference at

virtual address
00000324
printing eip:
c01605a9
*pde = 00000000

Oops: 0000 [#1]
CPU:    0
EIP:    0060:[<c01605a9>]    Not tainted
EFLAGS: 00010206

EIP is at iput+0x9/0x80
eax: 00000000 ebx: 00000200 ecx: caab2664 edx:
caab2664
esi: 00000200 edi: c13e4000 ebp: 00000061 esp:
c13e5e88
ds: 007b es: 007b ss: 0068
Process kswapd0 (pid: 8, threadinfo=c13e4000
task=c13eac60)

Stack: caab2640 c015ddf3 00000200 00000080 c13e4000
00000041 cfffeba0
c015e273 
       00000080 c0138968 00000080 000000d0 0000d4c8
01e04b6c 00000000
00000241 
       00000000 0000035a c027826c fffffffd 00000001
c0139abe 0000035a
000000d0 
Call Trace:
 [<c015ddf3>] prune_dcache+0x153/0x1a0
 [<c015e273>] shrink_dcache_memory+0x33/0x40
 [<c0138968>] shrink_slab+0x108/0x160
 [<c0139abe>] balance_pgdat+0x15e/0x180
 [<c0139be6>] kswapd+0x106/0x120
 [<c01180a0>] autoremove_wake_function+0x0/0x40
 [<c0108d96>] ret_from_fork+0x6/0x20
 [<c01180a0>] autoremove_wake_function+0x0/0x40
 [<c0139ae0>] kswapd+0x0/0x120
 [<c0106fe5>] kernel_thread_helper+0x5/0x20

Code: 83 bb 24 01 00 00 20 8b 83 80 00 00 00 8b 40
Quoted 14 lines

24 74 4b 85 c0

Signature · 12 lines
/================================================\
| Ramón Rey Vicente <ramon.rey at hispalinux.es> |
|                                                |
| Jabber ID <rreylinux at jabber.org>            |
|                                                |
| Public GPG Key http://pgp.escomposlinux.org    |
|                                                |
| GLiSa http://glisa.hispalinux.es               |
\================================================/


ATTACHMENT part 2 application/pgp-signature

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author
#2 lore raw
Quoted 5 lines · Ronald Jerome

That is the exact same Oops I get. I wasunable to catpure or print it because the kernel locks up.

How were you are ble catch the Oops message if yoru system froze?

My system work well :) after the Oops I got, not frozen, but with the kernel option

CONFIG_DEBUG_KERNEL=y
CONFIG_MAGIC_SYSRQ=y

you can try to recover information about crashes

Signature · 9 lines
/================================================\
| Ramón Rey Vicente <ramon.rey at hispalinux.es> |
|                                                |
| Jabber ID <rreylinux at jabber.org>            |
|                                                |
| Public GPG Key http://pgp.escomposlinux.org    |
|                                                |
| GLiSa http://glisa.hispalinux.es               |
\================================================/