abrt version: 2.0.3
architecture:   x86_64
cmdline:        ro root=UUID=4a9fb583-f769-4527-b268-9f816d6ca6ac rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=it_IT.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=it rhgb quiet nouveau.modeset=0 rdblacklist=nouveau
component:      kernel
kernel:         2.6.38.8-32.fc15.x86_64
kernel_tainted: 129
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
time:           Thu Jun 30 21:02:26 2011

backtrace:
:BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
:IP: [<ffffffffa031cd6a>] setup_bdle+0x4f/0xe4 [snd_hda_intel]
:PGD 115b3b067 PUD 11cdc6067 PMD 0 
:Oops: 0000 [#1] SMP 
:last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
:CPU 0 
:Modules linked in: fuse 8021q garp stp llc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables nvidia(P) snd_hda_codec_hdmi snd_hda_codec_realtek arc4 uvcvideo snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm microcode iwlagn videodev joydev serio_raw iwlcore mac80211 v4l2_compat_ioctl32 atl1e i2c_i801 iTCO_wdt iTCO_vendor_support cfg80211 snd_timer snd rfkill soundcore snd_page_alloc wmi ipv6 usb_storage uas nouveau ttm drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
:Pid: 2064, comm: skype Tainted: P            2.6.38.8-32.fc15.x86_64 #1 Acer, inc. Aspire 6930G     /Makalu           
:RIP: 0010:[<ffffffffa031cd6a>]  [<ffffffffa031cd6a>] setup_bdle+0x4f/0xe4 [snd_hda_intel]
:RSP: 0018:ffff880134a25b58  EFLAGS: 00010293
:RAX: 0000000000000000 RBX: ffff880133f50000 RCX: 0000000000000000
:RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880133f50000
:RBP: ffff880134a25b98 R08: 0000000000000004 R09: 0000000000000001
:R10: 00000000000006a7 R11: 0000000000000001 R12: 0000000000000000
:R13: ffff880132d10e00 R14: ffff880134a25be0 R15: ffff88013417e000
:FS:  0000000000000000(0000) GS:ffff8800bf600000(0063) knlGS:00000000f3ffcb70
:CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
:CR2: 0000000000000028 CR3: 00000001159b7000 CR4: 00000000000006f0
:DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
:DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
:Process skype (pid: 2064, threadinfo ffff880134a24000, task ffff880134ee0000)
:Stack:
: ffff880134a25be0 ffff880132d10e00 ffff880133f50000 ffff880132d10e00
: ffff88011da68c00 ffff880133f50000 ffff880132d10400 ffff88013418fb40
: ffff880134a25c18 ffffffffa031d030 0000000000013840 ffff8800bf60f2f0
:Call Trace:
: [<ffffffffa031d030>] azx_pcm_prepare+0x231/0x3ec [snd_hda_intel]
: [<ffffffffa02ebb3d>] snd_pcm_do_prepare+0x19/0x2c [snd_pcm]
: [<ffffffffa02eb637>] snd_pcm_action_single+0x33/0x6a [snd_pcm]
: [<ffffffff81474408>] ? _cond_resched+0xe/0x22
: [<ffffffffa02eb76a>] snd_pcm_action_nonatomic+0x4f/0x68 [snd_pcm]
: [<ffffffffa02ec691>] snd_pcm_common_ioctl1+0x3ee/0x9c6 [snd_pcm]
: [<ffffffff811eb0eb>] ? inode_has_perm+0x76/0x8c
: [<ffffffffa02ed1ad>] snd_pcm_playback_ioctl1+0x27e/0x293 [snd_pcm]
: [<ffffffff810f3f83>] ? handle_pte_fault+0x2a7/0x7a5
: [<ffffffffa02ed592>] snd_pcm_ioctl_compat+0x188/0x62e [snd_pcm]
: [<ffffffff8115bff4>] compat_sys_ioctl+0x1f9/0x12f1
: [<ffffffff81129e21>] ? path_put+0x1f/0x23
: [<ffffffff8109fa68>] ? audit_syscall_entry+0x145/0x171
: [<ffffffff8103df90>] sysenter_dispatch+0x7/0x2e
:Code: cc e9 94 00 00 00 41 81 7d 40 ff 00 00 00 0f 87 94 00 00 00 48 8b 83 c0 00 00 00 44 89 e2 44 89 e6 48 89 df 48 8b 80 d8 02 00 00 
:RIP  [<ffffffffa031cd6a>] setup_bdle+0x4f/0xe4 [snd_hda_intel]
: RSP <ffff880134a25b58>
:CR2: 0000000000000028

comment:
:1) I opened Skype;
:2) I executed the sound test Service;
:3) Crash. 
:
:In addition to the standard x86_64 libs, to get skype working, I installed also these i686 packages:
:
:glibc-2.13.90-9.i686 
:alsa-lib-1.0.24-2.fc15.i686 
:libXv-1.0.6-2.fc15.i686 
:libXScrnSaver-1.2.1-2.fc15.i686 
:qt-4.7.2-8.fc15.i686
:qt-x11-4.7.2-8.fc15.i686
:
:I've the same bug with Cheese.

kernel_tainted_long:
:Proprietary module has been loaded.
:Kernel has oopsed before.