915] BUG: Bad page state in process Xorg

[Thomas Meyer]

Hi,

After 9 days uptime, I wanted to restart my Gnome-Session, but this fails because Xorg is hitting a kernel bug.

Xorg server isn't kill-able. I see these log entries:

[126489.697509] CPU: 0 PID: 690 Comm: Xorg Tainted: G    B        3.12.0+ #95
[126489.697511] Hardware name: Acer Aspire 1810T/JM11-MS, BIOS v1.3310 03/25/2010
[126489.697513]  0000000000000000 ffff88009df21cd8 ffffffff81554512 ffff88009df21cf0
[126489.697517]  ffffffff81551f11 ffffea00022c5400 ffff88009df21d18 ffffffff810c549c
[126489.697520]  ffffea00022c5400 400000000008001c 0000000000000000 ffff88009df21d50
[126489.697524] Call Trace:
[126489.697529]  [<ffffffff81554512>] dump_stack+0x19/0x1b
[126489.697533]  [<ffffffff81551f11>] bad_page+0xc9/0xe2
[126489.697537]  [<ffffffff810c549c>] free_pages_prepare+0xac/0xc0
[126489.697541]  [<ffffffff810c5c7d>] free_hot_cold_page+0x1d/0x120
[126489.697545]  [<ffffffff810ca8fe>] __put_single_page+0x1e/0x30
[126489.697549]  [<ffffffff810caaa5>] put_page+0x25/0x40
[126489.697554]  [<ffffffff8134a133>] i915_gem_object_put_pages_gtt+0xc3/0x1a0
[126489.697558]  [<ffffffff8134ba68>] i915_gem_object_put_pages+0x78/0xd0
[126489.697562]  [<ffffffff8134d8b7>] i915_gem_free_object+0xe7/0x230
[126489.697566]  [<ffffffff8131bf25>] drm_gem_object_free+0x25/0x30
[126489.697570]  [<ffffffff81331b9b>] drm_gem_dmabuf_release+0x4b/0x70
[126489.697574]  [<ffffffff813b1e17>] dma_buf_release+0x27/0x90
[126489.697578]  [<ffffffff8110d41b>] __fput+0xcb/0x250
[126489.697582]  [<ffffffff8110d5d9>] ____fput+0x9/0x10
[126489.697586]  [<ffffffff81052e9c>] task_work_run+0x9c/0xc0
[126489.697590]  [<ffffffff8103a0f4>] do_exit+0x6f4/0xa00
[126489.697594]  [<ffffffff81052e84>] ? task_work_run+0x84/0xc0
[126489.697598]  [<ffffffff8103b301>] do_group_exit+0x31/0x90
[126489.697602]  [<ffffffff8103b36f>] SyS_exit_group+0xf/0x10
[126489.697606]  [<ffffffff8155f160>] system_call_fastpath+0x16/0x1b
[126489.697610] BUG: Bad page state in process Xorg  pfn:8b151
[126489.699837] page:ffffea00022c5440 count:0 mapcount:0 mapping:ffff88008cf63168 index:0x2b
[126489.702979] page flags: 0x400000000008001c(referenced|uptodate|dirty|swapbacked)
[126489.705295] Modules linked in: vfat fat ipt_MASQUERADE ip6t_REJECT xt_conntrack ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw tun tcp_lp loop fuse bluetooth snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_usb_audio snd_usbmidi_lib snd_hwdep snd_seq arc4 snd_pcm iwldvm snd_page_alloc snd_rawmidi snd_seq_device snd_timer snd mac80211 kvm_intel soundcore kvm asix acer_wmi usbnet acerhdf mii sparse_keymap pcspkr joydev iwlwifi atl1c wmi cfg80211 rfkill acpi_cpufreq freq_table uinput ipv6 xts gf128mul usb_storage udl syscopyarea sysfillrect sysimgblt drm_usb [last unloaded: iptable_raw]

How to kill the Xorg server and restart gdm?

with kind regards
thomas--
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