[linux-dvb] dvb-kernel API oops

[Emard <emard@softhome.net>]

HI Michael

Here's a dvb-kernel oops while sending ctrl-c to the application
using dvr0 after module has attemted to rmmod.

1. driver.av7110 start
2. alevt-date -vbi /dev/dvb/adapter0/dvr0
   since no channel is zapped, this application waits
   for some data, while it waits. let's attempt removing
   the modules
3. driver.av7110 stop
   .. it says some module is busy ..
4. send ctrl-c to application (alevt-date) and oops will appear:

ksymoops 2.4.5 on i686 2.4.20.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.20/ (default)
     -m /boot/2.4.20-nov4l1/System.map (specified)

Jan 19 22:25:38 emard kernel: ac97_codec: AC97 Audio codec, id: \203\204v9(SigmaTel STAC9721/23)
Jan 19 22:30:33 emard kernel: Unable to handle kernel paging request at virtual address f89d11a0
Jan 19 22:30:33 emard kernel: f88c0823
Jan 19 22:30:33 emard kernel: *pde = 019ce067
Jan 19 22:30:33 emard kernel: Oops: 0000
Jan 19 22:30:33 emard kernel: CPU:    0
Jan 19 22:30:33 emard kernel: EIP:    0010:[<f88c0823>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Jan 19 22:30:33 emard kernel: EFLAGS: 00010282
Jan 19 22:30:33 emard kernel: eax: f89d1150   ebx: f6bc6e60   ecx: 00000000   edx: 00000000
Jan 19 22:30:33 emard kernel: esi: f6a6d860   edi: c19ae320   ebp: f6a68dc0   esp: f69cde8c
Jan 19 22:30:33 emard kernel: ds: 0018   es: 0018   ss: 0018
Jan 19 22:30:33 emard kernel: Process alevt-date (pid: 336, stackpage=f69cd000)
Jan 19 22:30:33 emard kernel: Stack: c0130284 f6a6d860 f6bc6e60 f6bc6e60 00000000 f686e080 00000001 c012f2d5 
Jan 19 22:30:33 emard kernel:        f6bc6e60 f686e080 f6bc6e60 f686e080 00000003 00000003 f686e080 c01169a8 
Jan 19 22:30:33 emard kernel:        f6bc6e60 f686e080 f7cadbc0 f69cc000 f69cc000 00000002 f686e19c c0116f3f 
Jan 19 22:30:33 emard kernel: Call Trace:    [<c0130284>] [<c012f2d5>] [<c01169a8>] [<c0116f3f>] [<c011baea>]
Jan 19 22:30:33 emard kernel:   [<c0106a71>] [<c013c3e2>] [<c013c83f>] [<c0106c0c>]
Jan 19 22:30:33 emard kernel: Code: 8b 50 50 50 52 e8 1b fa ff ff 83 c4 08 c3 8d 76 00 53 8b 44 


>>EIP; f88c0823 <[dvb-core]dvb_demux_release+7/18>   <=====

>>eax; f89d1150 <END_OF_CODE+10a08d/????>
>>ebx; f6bc6e60 <_end+368c20c4/3852f264>
>>esi; f6a6d860 <_end+36768ac4/3852f264>
>>edi; c19ae320 <_end+16a9584/3852f264>
>>ebp; f6a68dc0 <_end+36764024/3852f264>
>>esp; f69cde8c <_end+366c90f0/3852f264>

Trace; c0130284 <fput+4c/e0>
Trace; c012f2d5 <filp_close+55/60>
Trace; c01169a8 <put_files_struct+54/bc>
Trace; c0116f3f <do_exit+a7/230>
Trace; c011baea <sig_exit+92/94>
Trace; c0106a71 <do_signal+1e9/258>
Trace; c013c3e2 <select_bits_free+a/10>
Trace; c013c83f <sys_select+457/464>
Trace; c0106c0c <signal_return+14/18>

Code;  f88c0823 <[dvb-core]dvb_demux_release+7/18>
00000000 <_EIP>:
Code;  f88c0823 <[dvb-core]dvb_demux_release+7/18>   <=====
   0:   8b 50 50                  mov    0x50(%eax),%edx   <=====
Code;  f88c0826 <[dvb-core]dvb_demux_release+a/18>
   3:   50                        push   %eax
Code;  f88c0827 <[dvb-core]dvb_demux_release+b/18>
   4:   52                        push   %edx
Code;  f88c0828 <[dvb-core]dvb_demux_release+c/18>
   5:   e8 1b fa ff ff            call   fffffa25 <_EIP+0xfffffa25> f88c0248 <[dvb-core]dvb_dmxdev_filter_free+0/d0>
Code;  f88c082d <[dvb-core]dvb_demux_release+11/18>
   a:   83 c4 08                  add    $0x8,%esp
Code;  f88c0830 <[dvb-core]dvb_demux_release+14/18>
   d:   c3                        ret    
Code;  f88c0831 <[dvb-core]dvb_demux_release+15/18>
   e:   8d 76 00                  lea    0x0(%esi),%esi
Code;  f88c0834 <[dvb-core]dvb_dvr_do_ioctl+0/48>
  11:   53                        push   %ebx
Code;  f88c0835 <[dvb-core]dvb_dvr_do_ioctl+1/48>
  12:   8b 44 00 00               mov    0x0(%eax,%eax,1),%eax

 


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