[Intel-gfx] Null pointer dereference at intel_release_load_detect_pipe in 2.6.34.3

[Clemens Eisserer]

Hi,

I just got this when playing with my external VGA monitor on my 945GM
based laptop.
Should I file a bug, or has this problem been already been fixed?

I was running 2.6.34.3 and intel git from about two weeks ago.

Thank, Clemens

Aug 31 22:03:26 localhost kernel: BUG: unable to handle kernel NULL
pointer dereference at 000000fc
Aug 31 22:03:26 localhost kernel: IP: [<f7e37b34>]
intel_release_load_detect_pipe+0x18/0x71 [i915]
Aug 31 22:03:26 localhost kernel: *pde = 00000000
Aug 31 22:03:26 localhost kernel: Oops: 0000 [#1] SMP
Aug 31 22:03:26 localhost kernel: last sysfs file:
/sys/devices/virtual/sound/timer/uevent
Aug 31 22:03:26 localhost kernel: Modules linked in: ppp_deflate
ppp_async crc_ccitt ppp_generic slhc vboxnetadp vboxnetflt vboxdrv
sunrpc ipv6 cpufr
eq_ondemand acpi_cpufreq btrfs zlib_deflate libcrc32c uinput
snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec
arc4 snd_hwdep op
tion usb_wwan ppdev snd_seq snd_seq_device sdhci_pci sdhci ecb
usbserial iwl3945 mmc_core parport_pc parport e1000e snd_pcm iwlcore
mac80211 toshiba_
acpi cfg80211 snd_timer snd rfkill toshiba_bluetooth soundcore
snd_page_alloc joydev microcode usb_storage firewire_ohci
firewire_core crc_itu_t yent
a_socket rsrc_nonstatic i915 drm_kms_helper drm i2c_algo_bit i2c_core
video output [last unloaded: scsi_wait_scan]
Aug 31 22:03:26 localhost kernel:
Aug 31 22:03:26 localhost kernel: Pid: 156, comm: kslowd000 Not
tainted 2.6.34.3-37.fc13.i686 #1 Portable PC/Tecra A8
Aug 31 22:03:26 localhost kernel: EIP: 0060:[<f7e37b34>] EFLAGS: 00010292 CPU: 0
Aug 31 22:03:26 localhost kernel: EIP is at
intel_release_load_detect_pipe+0x18/0x71 [i915]
Aug 31 22:03:26 localhost kernel: EAX: f67e8000 EBX: f67e8000 ECX:
f7e49ec0 EDX: f658fc00
Aug 31 22:03:26 localhost kernel: ESI: 00000000 EDI: 00000003 EBP:
f67a9e4c ESP: f67a9e38
Aug 31 22:03:26 localhost kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Aug 31 22:03:26 localhost kernel: Process kslowd000 (pid: 156,
ti=f67a8000 task=f6773300 task.ti=f67a8000)
Aug 31 22:03:26 localhost kernel: Stack:
Aug 31 22:03:26 localhost kernel: 70000000 f67c81f8 ffffffff f7e4a00c
f67a9e60 f67a9f40 f7e408a5 f67e804c
Aug 31 22:03:26 localhost kernel: <0> f658fc00 f67e8000 00000003
00000000 00000000 00000000 00000000 4353544e
Aug 31 22:03:26 localhost kernel: <0> 30383420 00000069 00000000
00000000 00000000 00000000 00000000 00000000
Aug 31 22:03:26 localhost kernel: Call Trace:
Aug 31 22:03:26 localhost kernel: [<f7e408a5>] ?
intel_tv_detect+0xc6/0x161 [i915]
Aug 31 22:03:26 localhost kernel: [<f7dc67e7>] ?
output_status_change_execute+0x8f/0x11f [drm_kms_helper]
Aug 31 22:03:26 localhost kernel: [<c049914c>] ? slow_work_execute+0x173/0x288
Aug 31 22:03:26 localhost kernel: [<c04993f3>] ? slow_work_thread+0x192/0x2b3
Aug 31 22:03:26 localhost kernel: [<c044d68d>] ?
autoremove_wake_function+0x0/0x34
Aug 31 22:03:26 localhost kernel: [<c0499261>] ? slow_work_thread+0x0/0x2b3
Aug 31 22:03:26 localhost kernel: [<c044d325>] ? kthread+0x64/0x69
Aug 31 22:03:26 localhost kernel: [<c044d2c1>] ? kthread+0x0/0x69
Aug 31 22:03:26 localhost kernel: [<c04039be>] ? kernel_thread_helper+0x6/0x10
Aug 31 22:03:26 localhost kernel: Code: 88 40 02 00 00 8b 94 91 84 10
00 00 e8 b7 fe ff ff 5d c3 55 89 e5 57 56 53 83 ec 08 0f 1f 44 00 00
8b 70 20 89 c3 89 cf 8b 48 28 <8b> 86 fc 00 00 00 80 7b 38 00 89 45 f0
74 25 c7 43 20 00 00 00
Aug 31 22:03:26 localhost kernel: EIP: [<f7e37b34>]
intel_release_load_detect_pipe+0x18/0x71 [i915] SS:ESP 0068:f67a9e38
Aug 31 22:03:26 localhost kernel: CR2: 00000000000000fc
Aug 31 22:03:26 localhost kernel: ---[ end trace 3b2b6b14563eaa7e ]---