Red Hat Bugzilla – Bug 169686
AC97 related kernel oops
Last modified: 2015-01-04 17:22:20 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; nb-NO; rv:1.7.12) Gecko/20050922 Fedora/1.0.7-1.1.fc4 Firefox/1.0.7 Description of problem: Got an AC97-related oops: agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode agpgart: Putting AGP V2 device at 0000:01:05.0 into 4x mode 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 video button battery ac yenta_socket rsrc_nonstatic pcmcia_core ohci_hcd shpchp i2c_ali1535 i2c_core snd_ali5451 snd_ac97_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc prism54 8139cp mii 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. <6>agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0. agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode agpgart: Putting AGP V2 device at 0000:01:05.0 into 4x mode agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0. agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode Version-Release number of selected component (if applicable): 2.6.13-1.1526_FC4 How reproducible: Didn't try Steps to Reproduce: 1. I was fiddling around with gstreamer-properties (alsasink/alsasrc) at the time. Actual Results: Oops. Expected Results: No oops. Additional info: Attaching `lspci -vv' and complete dmesg.
Created attachment 119497 [details] dmesg output
Created attachment 119498 [details] lspci -vv output
Mass update to all FC4 bugs: An update has been released (2.6.14-1.1637_FC4) which rebases to a new upstream kernel (2.6.13.2). As there were ~3500 changes upstream between this and the previous kernel, it's possible your bug has been fixed already. Please retest with this update, and update this bug if necessary. Thanks.
Sorry, the hardware where this occured is no longer available to me; I've bought a new laptop. Because of this, I will not be able to test if this bug has been fixed in recent kernel updates.