Bug 522070 – Kernel 3.14.14 oops causes xorg crash using ati radeon RV710 driver

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Dave 2014-09-03 16:54:28 UTC]

gentoo sources 3.14.14 is causing xorg to crash when using xf86-video-ati drivers.

More specifically the driver when used with my RV710 video card causes a kernel "oops" message.  Xorg then crashes leaving the computer in X but without a valid video mode and without input ability (xorg hadn't loaded that yet).  Computer did continue to work fine if accessed remotely via ssh.   But any time X was started, the above "lockup" would happen.

No errors in Xorg.log but the following was in my syslog:

[  924.878628] BUG: unable to handle kernel paging request at ffffebe000000000
  [  924.878667] IP: [<ffffffff8110ff2c>] kfree+0x3c/0xe0
  [  924.878694] PGD 0 
  [  924.878705] Oops: 0000 [#1] SMP 
  [  924.878723] Modules linked in: cx18_alsa mxl5005s s5h1409 cs5345 tuner radeon cx18 videobuf_vmalloc drm_kms_helper ttm drm tveeprom cx2341x r8169 mii snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer iTCO_wdt lpc_ich videobuf_core mfd_core i2c_algo_bit i2c_i801 coretemp intel_agp snd shpchp intel_gtt
  [  924.878909] CPU: 2 PID: 30248 Comm: X Not tainted 3.14.14-gentoo #14
  [  924.878935] Hardware name: MSI MS-7592/G41M4     (MS-7592), BIOS V1.14 05/18/2011
  [  924.878964] task: ffff8800a8d50000 ti: ffff8800a8f6c000 task.ti: ffff8800a8f6c000
  [  924.878993] RIP: 0010:[<ffffffff8110ff2c>]  [<ffffffff8110ff2c>] kfree+0x3c/0xe0
  [  924.879001] RSP: 0018:ffff8800a8f6da80  EFLAGS: 00010286
  [  924.879001] RAX: 000001e000000000 RBX: ffff8800c90c4000 RCX: 0000000000000000
  [  924.879001] RDX: 000077ff80000000 RSI: 00000000000071bc RDI: 0000000000000202
  [  924.879001] RBP: ffff88012a036e00 R08: 000000000000000c R09: 0000000000017700
  [  924.879001] R10: ffffebe000000000 R11: 0000000000000000 R12: 0000000000000000
  [  924.879001] R13: ffff8800ca804200 R14: ffff8800c90c4000 R15: 0000000000000000
  [  924.879001] FS:  00007f067ffb1880(0000) GS:ffff88012fd00000(0000) knlGS:0000000000000000
  [  924.879001] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [  924.879001] CR2: ffffebe000000000 CR3: 0000000129b10000 CR4: 00000000000007e0
  [  924.879001] Stack:
  [  924.879001]  ffffffffa027164c 0000000000017700 0018000000000002 ffff8800a8f35900
  [  924.879001]  00007410c90c4000 0000000000000000 ffff8800c90c53ca 0000000000000202
  [  924.879001]  ffff8800cba34000 ffff8800ca804200 ffffffffa0243472 ffff8800c90c4000
  [  924.879001] Call Trace:
  [  924.879001]  [<ffffffffa027164c>] ? r600_hdmi_setmode+0x5cc/0x860 [radeon]
  [  924.879001]  [<ffffffffa0243472>] ? radeon_irq_kms_enable_afmt+0x72/0xa0 [radeon]
  [  924.879001]  [<ffffffffa0271dd2>] ? r600_hdmi_enable+0x152/0x320 [radeon]
  [  924.879001]  [<ffffffffa01b0b59>] ? drm_crtc_helper_set_mode+0x479/0x4e0 [drm_kms_helper]
  [  924.879001]  [<ffffffffa0235e28>] ? radeon_connector_set_property+0x1b8/0x330 [radeon]
  [  924.879001]  [<ffffffffa01608c2>] ? drm_mode_obj_set_property_ioctl+0x132/0x330 [drm]
  [  924.879001]  [<ffffffffa0160aec>] ? drm_mode_connector_property_set_ioctl+0x2c/0x40 [drm]
  [  924.879001]  [<ffffffffa0150add>] ? drm_ioctl+0x49d/0x5a0 [drm]
  [  924.879001]  [<ffffffffa0160ac0>] ? drm_mode_obj_set_property_ioctl+0x330/0x330 [drm]
  [  924.879001]  [<ffffffffa021107b>] ? radeon_drm_ioctl+0x5b/0xb0 [radeon]
  [  924.879001]  [<ffffffff811294be>] ? do_vfs_ioctl+0x7e/0x500
  [  924.879001]  [<ffffffff812a4527>] ? file_has_perm+0x97/0xa0
  [  924.879001]  [<ffffffff811299d9>] ? SyS_ioctl+0x99/0xb0
  [  924.879001]  [<ffffffff81644672>] ? page_fault+0x22/0x30
  [  924.879001]  [<ffffffff8164a3e2>] ? system_call_fastpath+0x16/0x1b
  [  924.879001] Code: 77 00 00 b8 00 00 00 80 49 ba 00 00 00 00 00 ea ff ff 48 01 f8 48 0f 42 15 f2 40 74 00 48 01 d0 48 c1 e8 0c 48 c1 e0 06 49 01 c2 <49> 8b 02 f6 c4 80 75 50 49 8b 02 a8 80 74 6c 55 53 48 8b 6c 24 
  [  924.879001] RIP  [<ffffffff8110ff2c>] kfree+0x3c/0xe0
  [  924.879001]  RSP <ffff8800a8f6da80>
  [  924.879001] CR2: ffffebe000000000

I circumvented the error by switching to an older version of the kernel (linux-3.12.21-gentoo-r1).  I have no idea what is actually causing the kernel Oops.  It *may* be specific to the firmware used on my particular video card:

# lspci | grep -i VGA
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710 [Radeon HD 4550]

[Comment 1 Alex Xu (Hello71) 2014-09-04 10:53:14 UTC]

Please attach your kernel .config.

[Comment 2 Dave 2014-09-05 00:29:41 UTC]

Created attachment 384212 [details]
.config file

[Comment 3 Dave 2014-09-05 00:32:12 UTC]

this is the last .config file I used (before switching to earlier kernel version).  I tried several variation, but the kernel oops happened on all of them when the Radeon's modesetting module was invoked (as seen in the syslog backtrace shown above).

[Comment 4 bdouxx 2014-12-06 17:44:48 UTC]

perhaps related to this bug :

https://bugzilla.kernel.org/show_bug.cgi?id=88481

[Comment 5 Mike Pagano 2014-12-22 20:29:43 UTC]

This doesn't look like it's going to make 3.14, but the comment referenced in the tag is in >3.17.5.

Can someone please test a recent kernel to see if this issue is indeed fixed in that kernel version.

[Comment 6 Dave 2015-01-09 16:54:00 UTC]

I just updated my system to kernel 3.17.7.   It seems to work fine now.  Thanks for fixing the problem, and thank you all for the great work over the years!!!

:)