Oops caused by flashplayer using OSS emulation

Oops caused by flashplayer using OSS emulation

[Lee Revell]

It's possible that this bug no longer exists, I believe this is a CVS
version of ALSA from between 1.0.5a and 1.0.6.  This was caused by a
flash applet in mozilla.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c02d1d4f
*pde = 00000000
Oops: 0002 [#1]
PREEMPT
Modules linked in: snd_pcm_oss snd_mixer_oss af_packet realtime snd_emu10k1 snd_rawmidi snd_pcm snd_timer snd_seq_device snd_ac97_codec snd_page_alloc snd_util_mem snd_hwdep snd via_agp agpgart via_rhine mii crc32 usbhid uhci_hcd usbcore
CPU:    0
EIP:    0060:[<c02d1d4f>]    Not tainted VLI
EFLAGS: 00010246   (2.6.9-rc1-bk12-VP-S0)
EIP is at __sched_text_end+0xb1f/0xfd8
eax: 00000000   ebx: 00002000   ecx: 00002000   edx: d3782000
esi: 09873968   edi: 00000000   ebp: d3783df8   esp: d3783de8
ds: 007b   es: 007b   ss: 0068   preempt: 00000001
Process mozilla-bin (pid: 9158, threadinfo=d3782000 task=dda208c0)
Stack: 00000000 00002000 00002000 09873968 d3783e14 c021f8ce 00000000 09873968
       00002000 00000000 d9fc7400 d3783e3c de8beada 00000000 09873968 00002000
       00000000 00000001 00000000 d9fc7400 c15a0a60 d3783eb8 de8beffe c15a0a60
Call Trace:
 [<c021f8ce>] copy_from_user+0x5e/0x90
 [<de8beada>] snd_pcm_lib_write_transfer+0x7a/0x90 [snd_pcm]
 [<de8beffe>] snd_pcm_lib_write1+0x50e/0x8d0 [snd_pcm]
 [<de8b52c8>] snd_pcm_post_prepare+0x8/0x30 [snd_pcm]
 [<de8b43f8>] snd_pcm_action_single+0x48/0x50 [snd_pcm]
 [<c02d0b09>] cond_resched+0x9/0x70
 [<de8bf3c9>] snd_pcm_lib_write+0x9/0xb0 [snd_pcm]
 [<de8bf440>] snd_pcm_lib_write+0x80/0xb0 [snd_pcm]
 [<de8bea60>] snd_pcm_lib_write_transfer+0x0/0x90 [snd_pcm]
 [<de9da08e>] snd_pcm_oss_write3+0xae/0xe0 [snd_pcm_oss]
 [<de9da44b>] snd_pcm_oss_write2+0xbb/0xd0 [snd_pcm_oss]
 [<de9da5d6>] snd_pcm_oss_write1+0x176/0x1b0 [snd_pcm_oss]
 [<de9dceb2>] snd_pcm_oss_write+0x42/0x80 [snd_pcm_oss]
 [<c017037c>] vfs_write+0xbc/0x110
 [<c0170481>] sys_write+0x41/0x70
 [<c0106d97>] syscall_call+0x7/0xb
Code: ff 31 c0 e9 3e da f4 ff b0 01 e9 37 da f4 ff 01 c1 e9 7a da f4 ff 8d 4c 88 00 e9 71 da f4 ff 01 c1 eb 04 8d 4c 88 00 51 50 31 c0 <f3> aa 58 59 e9 9c da f4 ff b8 f2 ff ff ff e9 6d 69 f5 ff b8 f2





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Re: Oops caused by flashplayer using OSS emulation

[Takashi Iwai]

At Sat, 18 Sep 2004 19:09:15 -0400,
Lee Revell wrote:
> 
> It's possible that this bug no longer exists, I believe this is a CVS
> version of ALSA from between 1.0.5a and 1.0.6.  This was caused by a
> flash applet in mozilla.

Do you have any info with CONFIG_SND_DEBUG=y?


thanks,

Takashi

> 
> Unable to handle kernel NULL pointer dereference at virtual address 00000000
>  printing eip:
> c02d1d4f
> *pde = 00000000
> Oops: 0002 [#1]
> PREEMPT
> Modules linked in: snd_pcm_oss snd_mixer_oss af_packet realtime snd_emu10k1 snd_rawmidi snd_pcm snd_timer snd_seq_device snd_ac97_codec snd_page_alloc snd_util_mem snd_hwdep snd via_agp agpgart via_rhine mii crc32 usbhid uhci_hcd usbcore
> CPU:    0
> EIP:    0060:[<c02d1d4f>]    Not tainted VLI
> EFLAGS: 00010246   (2.6.9-rc1-bk12-VP-S0)
> EIP is at __sched_text_end+0xb1f/0xfd8
> eax: 00000000   ebx: 00002000   ecx: 00002000   edx: d3782000
> esi: 09873968   edi: 00000000   ebp: d3783df8   esp: d3783de8
> ds: 007b   es: 007b   ss: 0068   preempt: 00000001
> Process mozilla-bin (pid: 9158, threadinfo=d3782000 task=dda208c0)
> Stack: 00000000 00002000 00002000 09873968 d3783e14 c021f8ce 00000000 09873968
>        00002000 00000000 d9fc7400 d3783e3c de8beada 00000000 09873968 00002000
>        00000000 00000001 00000000 d9fc7400 c15a0a60 d3783eb8 de8beffe c15a0a60
> Call Trace:
>  [<c021f8ce>] copy_from_user+0x5e/0x90
>  [<de8beada>] snd_pcm_lib_write_transfer+0x7a/0x90 [snd_pcm]
>  [<de8beffe>] snd_pcm_lib_write1+0x50e/0x8d0 [snd_pcm]
>  [<de8b52c8>] snd_pcm_post_prepare+0x8/0x30 [snd_pcm]
>  [<de8b43f8>] snd_pcm_action_single+0x48/0x50 [snd_pcm]
>  [<c02d0b09>] cond_resched+0x9/0x70
>  [<de8bf3c9>] snd_pcm_lib_write+0x9/0xb0 [snd_pcm]
>  [<de8bf440>] snd_pcm_lib_write+0x80/0xb0 [snd_pcm]
>  [<de8bea60>] snd_pcm_lib_write_transfer+0x0/0x90 [snd_pcm]
>  [<de9da08e>] snd_pcm_oss_write3+0xae/0xe0 [snd_pcm_oss]
>  [<de9da44b>] snd_pcm_oss_write2+0xbb/0xd0 [snd_pcm_oss]
>  [<de9da5d6>] snd_pcm_oss_write1+0x176/0x1b0 [snd_pcm_oss]
>  [<de9dceb2>] snd_pcm_oss_write+0x42/0x80 [snd_pcm_oss]
>  [<c017037c>] vfs_write+0xbc/0x110
>  [<c0170481>] sys_write+0x41/0x70
>  [<c0106d97>] syscall_call+0x7/0xb
> Code: ff 31 c0 e9 3e da f4 ff b0 01 e9 37 da f4 ff 01 c1 e9 7a da f4 ff 8d 4c 88 00 e9 71 da f4 ff 01 c1 eb 04 8d 4c 88 00 51 50 31 c0 <f3> aa 58 59 e9 9c da f4 ff b8 f2 ff ff ff e9 6d 69 f5 ff b8 f2
> 
> 
> 
> 
> 
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> 


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Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php