New: [2.5.69-bk14] Unable to handle kernel null pointer

New: [2.5.69-bk14] Unable to handle kernel null pointer

Post by Martin J. Blig » Sat, 24 May 2003 16:40:09

           Summary: [2.5.69-bk14] Unable to handle kernel null pointer
    Kernel Version: 2.5.69-bk14
            Status: NEW
          Severity: normal

Distribution: Debian sid
Hardware Environment: HP Omnibook XE3l
Software Environment: kernel 2.5.69-bk14
Problem Description:

I get this everytime I run SVGATextMode with a resolution with more than 43
rows; I'm not sure that this failure it's a kernel bug, but I suppose it
should not give this error anyway...

Steps to reproduce:

# SVGATextMode "80x50x9"
<1>Unable to handle kernel NULL pointer dereference at virtual address
 printing eip:
 *pde = 00000000
 Oops: 0002 [#9]
 CPU:    0
 EIP:    0060:[<c01be43c>]    Not tainted
 EFLAGS: 00013202
 EIP is at vt_ioctl+0x1b3c/0x1d30
 eax: 00000000   ebx: 000001e0   ecx: 00000000   edx: 00000000
 esi: 00000006   edi: 0000000c   ebp: 00000050   esp: c642fea8
 ds: 007b   es: 007b   ss: 0068
 Process SVGATextMode (pid: 342, threadinfo=c642e000 task=c6af0d00)
 Stack: 00000005 00000050 00000028 00000001 c01c6b90 00000009 00000028
        c66e7540 c642fedc c7639ca0 c71eb940 00000101 c7113000 00000001
        c71eb940 c11e67bc 00000001 c6f95000 000003e8 c015630c 000003e8
 Call Trace:
  [<c01c6b90>] con_open+0x0/0x90
  [<c015630c>] vfs_permission+0x7c/0x120
  [<c015223d>] get_chrfops+0x2d/0x90
  [<c015258a>] chrdev_open+0x6a/0xc0
  [<c0148b7a>] dentry_open+0x1ea/0x220
  [<c01bc900>] vt_ioctl+0x0/0x1d30
  [<c01b5e6c>] tty_ioctl+0x45c/0x570
  [<c015ada0>] sys_ioctl+0x100/0x280
  [<c010922b>] syscall_call+0x7/0xb

 Code: 89 58 10 66 85 ff 74 0a 8b 04 b5 60 7a 2f c0 89 78 68 89 34
  Segmentation fault

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1. 2.5.69 - Nothing gets installed in /lib/modules/2.5.69/kernel


I downloaded linux kernel 2.5.68 tarball, move 2.5.68 to 2.5.69,
patched it with patch-2.5.69 and then the latest cset. And after a
little struggle, got module-init-tools also installed. The "make
install" runs smoothly but no modules are installed under

I checked if modules are getting built. So I checked under fs/smbfs to
see if there were any .o files as I had selected smbfs to be built as
a module. But no .o files there.

Any indicators as to be what could be the problem?

I am running all this on Mandrake 9.1.



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4. Change X login screen? (rh7.3)

5. ppp problems in 2.5.69-bk14

6. What is GDB

7. OSDL DBT-2 AS vs. Deadline 2.5.69-mm3 2.5.69-mm2

8. GFX Getting Pointer To Screen Mem

9. USB mouse freezes under X - 2.5.69 and 2.5.69-mm*

10. [2.5.69] kexec for 2.5.69 available

11. Problems with IDE CF in 2.5.69, 2.5.69-bk13

12. INFO: kernel: Unable to handle kernel NULL pointer dereference

13. kernel: Unable to handle kernel NULL pointer