Tvmixer Oops

Tvmixer Oops

[Udo A. Steinberg]

Hello,

Attached is the trace of an oops which seems to be caused by the
tvmixer code. Tvmixer is compiled monolithically into the kernel,
the rest of bttv is compiled as modules.

Kernel is 2.4.5-ac17, compiled with gcc-3.0.

Regards,
Udo.


ksymoops 2.4.1 on i686 2.4.5-ac17.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.5-ac17/ (default)
     -m /boot/System.map-2.4.5-ac17 (specified)
 
Unable to handle kernel NULL pointer dereference at virtual address 00000030
c01bd8d0
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c01bd8d0>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: 00000000   ebx: c86d1e40   ecx: c86d1e40   edx: c01bd8c0
esi: c14e92c0   edi: cf2e31c0   ebp: cbd0bc40   esp: c9665edc
ds: 0018   es: 0018   ss: 0018
Process kdeinit (pid: 11670, stackpage=c9665000)
Stack: c01311b9 cf2e31c0 c86d1e40 c01209c0 00000000 40afea15 00000282 c86d1e40
       00000000 00000001 0000000a c01301de c86d1e40 c4749580 00000000 c86d1e40
       00000000 00000001 c4749580 c011759e c86d1e40 c4749580 cc8ffc40 c9664000
Call Trace: [<c01311b9>] [<c01209c0>] [<c01301de>] [<c011759e>] [<c0117b7a>]
   [<c01306d3>] [<c0112bad>] [<c0117cde>] [<c0106cfb>]
Code: 8b 50 30 85 d2 74 04 50 ff d2 58 31 c0 c3 89 f6 b8 ed ff ff

>>EIP; c01bd8d0 <tvmixer_release+10/30>   <=====
Trace; c01311b9 <fput+39/c0>
Trace; c01209c0 <clear_page_tables+60/90>
Trace; c01301de <filp_close+3e/60>
Trace; c011759e <put_files_struct+4e/c0>
Trace; c0117b7a <do_exit+8a/1c0>
Trace; c01306d3 <sys_write+83/d0>
Trace; c0112bad <schedule+1fd/3c0>
Trace; c0117cde <sys_exit+e/10>
Trace; c0106cfb <system_call+33/38>
Code;  c01bd8d0 <tvmixer_release+10/30>
00000000 <_EIP>:
Code;  c01bd8d0 <tvmixer_release+10/30>   <=====
   0:   8b 50 30                  mov    0x30(%eax),%edx   <=====
Code;  c01bd8d3 <tvmixer_release+13/30>
   3:   85 d2                     test   %edx,%edx
Code;  c01bd8d5 <tvmixer_release+15/30>
   5:   74 04                     je     b <_EIP+0xb> c01bd8db <tvmixer_release+1b/30>
Code;  c01bd8d7 <tvmixer_release+17/30>
   7:   50                        push   %eax
Code;  c01bd8d8 <tvmixer_release+18/30>
   8:   ff d2                     call   *%edx
Code;  c01bd8da <tvmixer_release+1a/30>
   a:   58                        pop    %eax
Code;  c01bd8db <tvmixer_release+1b/30>
   b:   31 c0                     xor    %eax,%eax
Code;  c01bd8dd <tvmixer_release+1d/30>
   d:   c3                        ret
Code;  c01bd8de <tvmixer_release+1e/30>
   e:   89 f6                     mov    %esi,%esi
Code;  c01bd8e0 <tvmixer_release+20/30>
  10:   b8 ed ff ff 00            mov    $0xffffed,%eax

Re: Tvmixer Oops

[Gerd Knorr]

On Mon, Jun 25, 2001 at 12:56:03PM +0200, Udo A. Steinberg wrote:
> 
> Hello,
> 
> Attached is the trace of an oops which seems to be caused by the
> tvmixer code. Tvmixer is compiled monolithically into the kernel,
> the rest of bttv is compiled as modules.

Any hints on how to reproduce that one?

  Gerd

Re: Tvmixer Oops

[Udo A. Steinberg]

Hi,

Gerd Knorr wrote:
> 
> On Mon, Jun 25, 2001 at 12:56:03PM +0200, Udo A. Steinberg wrote:

> > Attached is the trace of an oops which seems to be caused by the
> > tvmixer code. Tvmixer is compiled monolithically into the kernel,
> > the rest of bttv is compiled as modules.
> 
> Any hints on how to reproduce that one?

I cannot reproduce it again - it happened just once so far. The time
it happened, I zapped X/KDE while xawtv ran via Ctrl-Alt-Backspace.

Re: Tvmixer Oops

[Udo A. Steinberg]

Gerd Knorr wrote:
> 
> On Mon, Jun 25, 2001 at 12:56:03PM +0200, Udo A. Steinberg wrote:
> >
> > Hello,
> >
> > Attached is the trace of an oops which seems to be caused by the
> > tvmixer code. Tvmixer is compiled monolithically into the kernel,
> > the rest of bttv is compiled as modules.
> 
> Any hints on how to reproduce that one?

I just got another one, however I still cannot reliably reproduce it.

Regards,
Udo.


ksymoops 2.4.1 on i686 2.4.5-ac18.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.5-ac18/ (default)
     -m /boot/System.map-2.4.5-ac18 (specified)
 
Unable to handle kernel NULL pointer dereference at virtual address 0000002c
c01b8faa
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c01b8faa>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010282
eax: 00000000   ebx: ccb16980   ecx: 00000010   edx: 00000000
esi: c02f7fc0   edi: 00000000   ebp: 00000010   esp: cf351ef4
ds: 0018   es: 0018   ss: 0018
Process rat-4.2.19-medi (pid: 5876, stackpage=cf351000)
Stack: c028b580 00000000 c01cfa68 c5c0dc40 c85162c0 00000000 c85162c0 c5c0dc40
       c14a82c0 c028ab60 c85162c0 c5c0dc40 c14a82c0 c5c0dc40 ffffffeb 00000002
       c013900a c5c0dc40 c012febe c5c0dc40 c85162c0 c85162c0 c5c0dc40 00000000
Call Trace: [<c01cfa68>] [<c013900a>] [<c012febe>] [<c012ef5d>] [<c012ee92>]
   [<c012f186>] [<c0106bfb>]
Code: 83 78 2c 00 74 09 50 8b 40 2c ff d0 83 c4 04 31 c0 5b 5e c3

>>EIP; c01b8faa <tvmixer_open+5a/70>   <=====
Trace; c01cfa68 <soundcore_open+108/190>
Trace; c013900a <permission+2a/30>
Trace; c012febe <chrdev_open+3e/50>
Trace; c012ef5d <dentry_open+bd/140>
Trace; c012ee92 <filp_open+52/60>
Trace; c012f186 <sys_open+36/a0>
Trace; c0106bfb <system_call+33/38>
Code;  c01b8faa <tvmixer_open+5a/70>
00000000 <_EIP>:
Code;  c01b8faa <tvmixer_open+5a/70>   <=====
   0:   83 78 2c 00               cmpl   $0x0,0x2c(%eax)   <=====
Code;  c01b8fae <tvmixer_open+5e/70>
   4:   74 09                     je     f <_EIP+0xf> c01b8fb9 <tvmixer_open+69/70>
Code;  c01b8fb0 <tvmixer_open+60/70>
   6:   50                        push   %eax
Code;  c01b8fb1 <tvmixer_open+61/70>
   7:   8b 40 2c                  mov    0x2c(%eax),%eax
Code;  c01b8fb4 <tvmixer_open+64/70>
   a:   ff d0                     call   *%eax
Code;  c01b8fb6 <tvmixer_open+66/70>
   c:   83 c4 04                  add    $0x4,%esp
Code;  c01b8fb9 <tvmixer_open+69/70>
   f:   31 c0                     xor    %eax,%eax
Code;  c01b8fbb <tvmixer_open+6b/70>
  11:   5b                        pop    %ebx
Code;  c01b8fbc <tvmixer_open+6c/70>
  12:   5e                        pop    %esi
Code;  c01b8fbd <tvmixer_open+6d/70>
  13:   c3                        ret