[Intel-gfx] Fedora Core 12 x86_64 lockup/crash

[Zhenyu Wang]

On 2009.12.02 15:38:29 -0600, Avedissian, Vahe Y (AS) wrote:
> Hi Clemens,
> 
> You were right. The kernel was not crashed and I was able to ssh to the machine. I have attached the dmesg output.
> There is an error about dereferencing a NULL pointer...

> BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> IP: [<ffffffffa007516d>] intel_tv_mode_set+0x231/0x7b2 [i915]
> PGD 173436067 PUD 170dfd067 PMD 0 
> Oops: 0000 [#1] SMP 
> last sysfs file: /sys/devices/pci0000:00/0000:00:1c.0/0000:04:00.0/resource
> CPU 1 
> Modules linked in: sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_multipath uinput snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm ppdev snd_timer i2c_i801 iTCO_wdt parport_pc iTCO_vendor_support snd e1000e soundcore snd_page_alloc parport csx pata_acpi ata_generic pata_sil680 floppy i915 drm_kms_helper drm i2c_algo_bit i2c_core video output [last unloaded: microcode]
> Pid: 6475, comm: X Not tainted 2.6.31.5-127.fc12.x86_64 #1 Scotch Bonnet
> RIP: 0010:[<ffffffffa007516d>]  [<ffffffffa007516d>] intel_tv_mode_set+0x231/0x7b2 [i915]
> RSP: 0018:ffff88013cfc18a8  EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff88017851c000 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
> RBP: ffff88013cfc1948 R08: 00000000000001df R09: 0000000000000000
> R10: 0000000000000040 R11: 0000000000000000 R12: ffff8801785e3800
> R13: ffff8801785e6bd8 R14: ffffffffa007c0c0 R15: 00000000400200c0
> FS:  00007f48116087e0(0000) GS:ffff880028045000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000000000000008 CR3: 000000013cdb3000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process X (pid: 6475, threadinfo ffff88013cfc0000, task ffff8801731ac680)
> Stack:
>  0000034a785e5000 0000000c0000002c 0000000000000000 0000000000000000
> <0> 0000000000000000 ffff880100000000 0000002c0000000c ffff8801785e5000
> <0> 0000007a3cfc1948 0000000000000000 ffff880100000000 ffff880100000000
> Call Trace:
>  [<ffffffffa00521f4>] drm_crtc_helper_set_mode+0x287/0x34e [drm_kms_helper]
>  [<ffffffffa006ca8a>] intel_get_load_detect_pipe+0x101/0x14a [i915]
>  [<ffffffffa0075f35>] intel_tv_detect+0x8d/0x14d [i915]
>  [<ffffffffa0052b8b>] drm_helper_probe_single_connector_modes+0xba/0x282 [drm_kms_helper]
>  [<ffffffffa002faa0>] drm_mode_getconnector+0xf5/0x39a [drm]
>  [<ffffffffa002f9ab>] ? drm_mode_getconnector+0x0/0x39a [drm]
>  [<ffffffffa002521f>] drm_ioctl+0x237/0x2f4 [drm]
>  [<ffffffff81108a15>] vfs_ioctl+0x6f/0x87
>  [<ffffffff81049021>] ? finish_task_switch+0xc3/0xe6
>  [<ffffffff81108f24>] do_vfs_ioctl+0x47b/0x4c1
>  [<ffffffff81108fc0>] sys_ioctl+0x56/0x79
>  [<ffffffff81011cf2>] system_call_fastpath+0x16/0x1b
> Code: 0f 45 d3 45 8b 9e 8c 00 00 00 44 89 5d 88 41 89 d3 41 81 cb 00 00 00 20 83 7d 88 00 41 0f 45 d3 45 8b 9e 90 00 00 00 44 89 5d c8 <45> 8b 59 08 44 89 5d 8c 45 8b 5e 7c 44 89 5d bc 45 8b 9e 80 00 
> RIP  [<ffffffffa007516d>] intel_tv_mode_set+0x231/0x7b2 [i915]
>  RSP <ffff88013cfc18a8>
> CR2: 0000000000000008
> ---[ end trace 7c726309abe9f24b ]---

Looks this should be fixed by Chris's TV mode_set patch. 
Could you test the patch on drm-intel-next?

commit d271817baecbccb47da0d9f28c285a0dae8a06b7
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Nov 27 13:06:56 2009 +0000

    drm/i915: Avoid NULL dereference with component_only tv_modes
        

-- 
Open Source Technology Center, Intel ltd.

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