From: Dave Jones <davej@redhat.com>
To: alsa-devel@alsa-project.org
Subject: ac97 oops in ali modem driver
Date: Sun, 2 Oct 2005 21:01:09 -0400 [thread overview]
Message-ID: <20051003010109.GA27888@redhat.com> (raw)
I just had a user file a Fedora bug with the following oops.
Unable to handle kernel NULL pointer dereference at virtual address 000001a4
printing eip:
df969005
*pde = 12620067
Oops: 0000 [#1]
Modules linked in: nfs radeon drm nfsd exportfs lockd nfs_acl autofs4 sunrpc pcmcia dm_mod vid
eo button battery ac yenta_socket rsrc_nonstatic pcmcia_core ohci_hcd shpchp i2c_ali1535 i2c_c
ore snd_ali5451 snd_ac97_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_de
vice snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc prism54 8139cp m
ii floppy joydev ext3 jbd
CPU: 0
EIP: 0060:[<df969005>] Not tainted VLI
EFLAGS: 00010202 (2.6.13-1.1526_FC4)
EIP is at snd_ac97_valid_reg+0x5/0x135 [snd_ac97_codec]
eax: 00000000 ebx: 00000040 ecx: 00000000 edx: 00000040
esi: 00000000 edi: 00000040 ebp: 00001f40 esp: ca515edc
ds: 007b es: 007b ss: 0068
Process gstreamer-prope (pid: 10503, threadinfo=ca515000 task=da809aa0)
Stack: 00000040 df969149 de2ac800 00000001 d4fb1000 de3bf560 df9207ca 00000000
fffffff4 de3bf560 db6b9000 df92d6b2 00000000 00000001 00000246 00000000
00000000 00000000 0000025c 0000025c d4fb1000 d4fb1000 fffffff4 de3bf560
Call Trace:
[<df969149>] snd_ac97_write+0x14/0x5a [snd_ac97_codec]
[<df9207ca>] snd_ali_modem_hw_params+0x2c/0x4c [snd_ali5451]
[<df92d6b2>] snd_pcm_hw_params+0x290/0x609 [snd_pcm]
[<df92da7b>] snd_pcm_hw_params_user+0x50/0x6a [snd_pcm]
[<df9349b5>] snd_pcm_capture_ioctl1+0x2e/0x1ce [snd_pcm]
[<df934b70>] snd_pcm_capture_ioctl+0x0/0x1b [snd_pcm]
[<c01bf0e9>] do_ioctl+0x19/0x55
[<c01bf217>] vfs_ioctl+0x50/0x1aa
[<c01bf3ce>] sys_ioctl+0x5d/0x6b
[<c0104409>] sysenter_past_esp+0x56/0x79
Code: Bad EIP value.
It looks like we're somehow ending up with card->ac97 == NULL.
This kernel is based on 2.6.13.2, with no ALSA patches other than
an unrelated emu10k1 diff. From eyeballing a quick diff of
the ali driver between 2.6.13.2 and current upstream 2.6.14rc3,
it doesn't look like this has been addressed already.
Dave
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next reply other threads:[~2005-10-03 1:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-03 1:01 Dave Jones [this message]
2005-10-03 14:34 ` ac97 oops in ali modem driver Sasha Khapyorsky
2005-10-04 11:05 ` Takashi Iwai
2005-10-05 0:01 ` Sasha Khapyorsky
2005-10-05 9:57 ` Takashi Iwai
2005-10-06 10:00 ` Sasha Khapyorsky
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