Bug 1368500

Description of problem:

Sometimes radeon driver fails on drivers/gpu/drm/radeon/radeon_object.c:84 and renders machine unusable.

Example of stacktrace:
Aug 19 10:38:40 borg kernel: ------------[ cut here ]------------
Aug 19 10:38:40 borg kernel: WARNING: CPU: 7 PID: 3384 at drivers/gpu/drm/radeon/radeon_object.c:84 radeon_ttm_bo_destroy+0xe3/0xf0 [radeon]
Aug 19 10:38:40 borg kernel: Modules linked in: fuse tun ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter xt_conntrack ip_set nfnetlink ebtable_broute bridge stp llc ebtable_nat ip6table_mangle ip6table_raw ip6table_nat nf_conntrack_ipv6 nf_defr
Aug 19 10:38:40 borg kernel:  snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd mei_me soundcore mei tpm_tis wmi e1000e ptp tpm shpchp lpc_ich i2c_i801 pps_core nfsd auth_rpcgss nfs_acl lockd grace binfmt_misc sunrpc btrfs xor raid6
Aug 19 10:38:40 borg kernel: CPU: 7 PID: 3384 Comm: ImgDecoder #9 Tainted: G        W       4.6.6-200.fc23.x86_64 #1
Aug 19 10:38:40 borg kernel: Hardware name: MSI MS-7885/X99S SLI PLUS (MS-7885), BIOS 1.80 03/20/2015
Aug 19 10:38:40 borg kernel:  0000000000000286 00000000197134c1 ffff8803f37bf950 ffffffff813d93fe
Aug 19 10:38:40 borg kernel:  0000000000000000 0000000000000000 ffff8803f37bf990 ffffffff810a730b
Aug 19 10:38:40 borg kernel:  00000054c00fcd99 ffff8803f59d0868 ffff8803f59d0800 ffffffffffffffff
Aug 19 10:38:40 borg kernel: Call Trace:
Aug 19 10:38:40 borg kernel:  [<ffffffff813d93fe>] dump_stack+0x63/0x85
Aug 19 10:38:40 borg kernel:  [<ffffffff810a730b>] __warn+0xcb/0xf0
Aug 19 10:38:40 borg kernel:  [<ffffffff810a743d>] warn_slowpath_null+0x1d/0x20
Aug 19 10:38:40 borg kernel:  [<ffffffffc00fcdb3>] radeon_ttm_bo_destroy+0xe3/0xf0 [radeon]
Aug 19 10:38:40 borg kernel:  [<ffffffffc008e194>] ttm_bo_release_list+0xa4/0x140 [ttm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc008e59b>] ttm_bo_release+0x19b/0x230 [ttm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc008e654>] ttm_bo_unref+0x24/0x30 [ttm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc00fd2e9>] radeon_bo_unref+0x39/0x70 [radeon]
Aug 19 10:38:40 borg kernel:  [<ffffffffc01105e7>] radeon_gem_object_free+0x57/0x70 [radeon]
Aug 19 10:38:40 borg kernel:  [<ffffffffc003c2b0>] drm_gem_object_free+0x30/0x50 [drm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc003cc74>] drm_gem_object_handle_unreference_unlocked+0xc4/0x110 [drm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc003cd15>] drm_gem_object_release_handle+0x55/0xa0 [drm]
Aug 19 10:38:40 borg kernel:  [<ffffffff813d9e7e>] idr_for_each+0xae/0x110
Aug 19 10:38:40 borg kernel:  [<ffffffffc003ccc0>] ? drm_gem_object_handle_unreference_unlocked+0x110/0x110 [drm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc003d3e0>] drm_gem_release+0x20/0x30 [drm]
Aug 19 10:38:40 borg kernel:  [<ffffffffc003c195>] drm_release+0x385/0x470 [drm]
Aug 19 10:38:40 borg kernel:  [<ffffffff81249e8f>] __fput+0xdf/0x1f0
Aug 19 10:38:40 borg kernel:  [<ffffffff81249fde>] ____fput+0xe/0x10
Aug 19 10:38:40 borg kernel:  [<ffffffff810c5121>] task_work_run+0x81/0xa0
Aug 19 10:38:40 borg kernel:  [<ffffffff810ab082>] do_exit+0x2d2/0xb50
Aug 19 10:38:40 borg kernel:  [<ffffffff810ab987>] do_group_exit+0x47/0xb0
Aug 19 10:38:40 borg kernel:  [<ffffffff810b6ca1>] get_signal+0x291/0x610
Aug 19 10:38:40 borg kernel:  [<ffffffff8102e137>] do_signal+0x37/0x710
Aug 19 10:38:40 borg kernel:  [<ffffffff81129619>] ? do_futex+0x2d9/0xb40
Aug 19 10:38:40 borg kernel:  [<ffffffff8100320c>] exit_to_usermode_loop+0x8c/0xd0
Aug 19 10:38:40 borg kernel:  [<ffffffff81003d21>] syscall_return_slowpath+0xa1/0xb0
Aug 19 10:38:40 borg kernel:  [<ffffffff817dac7a>] entry_SYSCALL_64_fastpath+0xa2/0xa4
Aug 19 10:38:40 borg kernel: ---[ end trace b6515ba81564391a ]---


After some time of working it prints out several(100+) of those stacktraces ^^ in the row. It cause to fail Xserver and it renders machine unusable until I reboot it.

Version-Release number of selected component (if applicable):
burlak@borg ~ $ uname -r
4.6.6-200.fc23.x86_64
burlak@borg ~ $ lspci | grep -i radeon
06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Hawaii XT / Grenada XT [Radeon R9 290X/390X] (rev 80)


How reproducible:
Low reproducibility, it usually happens 1-3 times per day under normal use of computer.

Additional info:
Usually when this happens it prints out lot of stacktraces but I saw little pattern there, There usually only two different PID numbers mentioned in those stack traces.