[64923.689116] elogind[3575]: Removed session c12. [67672.191919] radeon_dp_aux_transfer_native: 74 callbacks suppressed [76950.015850] radeon_dp_aux_transfer_native: 74 callbacks suppressed [83349.694180] radeon_dp_aux_transfer_native: 74 callbacks suppressed [95511.489943] radeon_dp_aux_transfer_native: 74 callbacks suppressed [99680.665778] radeon_dp_aux_transfer_native: 74 callbacks suppressed [100691.140847] radeon_dp_aux_transfer_native: 74 callbacks suppressed [105905.024304] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] [105905.024318] CPU: 2 PID: 23814 Comm: kworker/2:2 Not tainted 5.2.11+ #11 [105905.024321] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 87.0.0.0.0 06/14/2019 [105905.024344] Workqueue: events radeon_dp_work_func [radeon] [105905.024348] Call Trace: [105905.024355] dump_stack+0x46/0x5b [105905.024361] panic+0xf3/0x288 [105905.024389] ? radeon_dp_needs_link_train+0x69/0x70 [radeon] [105905.024393] __stack_chk_fail+0x10/0x10 [105905.024416] radeon_dp_needs_link_train+0x69/0x70 [radeon] [105905.024438] radeon_connector_hotplug+0xa4/0xd0 [radeon] [105905.024460] radeon_dp_work_func+0x28/0x40 [radeon] [105905.024465] process_one_work+0x1b4/0x340 [105905.024468] worker_thread+0x44/0x3d0 [105905.024473] kthread+0xeb/0x120 [105905.024476] ? process_one_work+0x340/0x340 [105905.024480] ? kthread_park+0xa0/0xa0 [105905.024483] ret_from_fork+0x1f/0x30 [105905.024530] Kernel Offset: disabled [105905.024535] ---[ end Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] ]--- [ 892.543476] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] [ 892.543490] CPU: 2 PID: 21 Comm: kworker/2:0 Not tainted 5.2.11+ #11 [ 892.543493] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 87.0.0.0.0 06/14/2019 [ 892.543514] Workqueue: events radeon_dp_work_func [radeon] [ 892.543518] Call Trace: [ 892.543525] dump_stack+0x46/0x5b [ 892.543530] panic+0xf3/0x288 [ 892.543556] ? radeon_dp_needs_link_train+0x69/0x70 [radeon] [ 892.543560] __stack_chk_fail+0x10/0x10 [ 892.543581] radeon_dp_needs_link_train+0x69/0x70 [radeon] [ 892.543600] radeon_connector_hotplug+0xa4/0xd0 [radeon] [ 892.543621] radeon_dp_work_func+0x28/0x40 [radeon] [ 892.543624] process_one_work+0x1b4/0x340 [ 892.543628] worker_thread+0x44/0x3d0 [ 892.543631] kthread+0xeb/0x120 [ 892.543634] ? process_one_work+0x340/0x340 [ 892.543637] ? kthread_park+0xa0/0xa0 [ 892.543641] ret_from_fork+0x1f/0x30 [ 892.543691] Kernel Offset: disabled [ 892.543696] ---[ end Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] ]--- [88827.843269] radeon_dp_aux_transfer_native: 74 callbacks suppressed [95364.535794] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] [95364.535807] CPU: 2 PID: 21 Comm: kworker/2:0 Not tainted 5.2.11+ #11 [95364.535810] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 87.0.0.0.0 06/14/2019 [95364.535833] Workqueue: events radeon_dp_work_func [radeon] [95364.535836] Call Trace: [95364.535844] dump_stack+0x46/0x5b [95364.535850] panic+0xf3/0x288 [95364.535878] ? radeon_dp_needs_link_train+0x69/0x70 [radeon] [95364.535882] __stack_chk_fail+0x10/0x10 [95364.535906] radeon_dp_needs_link_train+0x69/0x70 [radeon] [95364.535927] radeon_connector_hotplug+0xa4/0xd0 [radeon] [95364.535950] radeon_dp_work_func+0x28/0x40 [radeon] [95364.535955] process_one_work+0x1b4/0x340 [95364.535958] worker_thread+0x44/0x3d0 [95364.535962] kthread+0xeb/0x120 [95364.535966] ? process_one_work+0x340/0x340 [95364.535969] ? kthread_park+0xa0/0xa0 [95364.535974] ret_from_fork+0x1f/0x30 [95364.536022] Kernel Offset: disabled [95364.536028] ---[ end Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] ]--- [64345.212673] BUG: kernel NULL pointer dereference, address: 00000000000003e8 [64345.212684] #PF: supervisor write access in kernel mode [64345.212687] #PF: error_code(0x0002) - not-present page [64345.212690] PGD 0 P4D 0 [64345.212695] Oops: 0002 [#1] SMP [64345.212699] CPU: 5 PID: 3680 Comm: Xorg Not tainted 5.2.11+ #11 [64345.212702] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 87.0.0.0.0 06/14/2019 [64345.212710] RIP: 0010:mutex_lock+0x14/0x30 [64345.212714] Code: 84 00 00 00 00 00 be 02 00 00 00 e9 16 fb ff ff 66 0f 1f 44 00 00 53 48 89 fb e8 f7 f0 ff ff 31 c0 65 48 8b 14 25 c0 5c 01 00 48 0f b1 13 75 02 5b c3 48 89 df 5b eb cd 0f 1f 00 66 2e 0f 1f [64345.212718] RSP: 0018:ffffc900006c7a10 EFLAGS: 00010246 [64345.212721] RAX: 0000000000000000 RBX: 00000000000003e8 RCX: ffffc900006c7ab7 [64345.212724] RDX: ffff88845aca0000 RSI: 0000000000000008 RDI: 00000000000003e8 [64345.212726] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [64345.212729] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [64345.212732] R13: 00000000fffffffb R14: 00000000ffffffb9 R15: 0000000000000000 [64345.212735] FS: 00007fe1dfffca80(0000) GS:ffff88845f940000(0000) knlGS:0000000000000000 [64345.212738] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [64345.212740] CR2: 00000000000003e8 CR3: 0000000451d00002 CR4: 00000000000606a0 [64345.212743] Call Trace: [64345.212754] drm_dp_dpcd_access+0x67/0x110 [drm_kms_helper] [64345.212762] drm_dp_dpcd_write+0x21/0x90 [drm_kms_helper] [64345.212796] radeon_dp_set_tp+0x5f/0xb0 [radeon] [64345.212824] radeon_dp_link_train+0x569/0x590 [radeon] [64345.212854] radeon_atom_encoder_dpms_dig+0x21a/0x4e0 [radeon] [64345.212872] ? atombios_blank_crtc+0x140/0x140 [radeon] [64345.212899] radeon_atom_encoder_dpms+0xa6/0x110 [radeon] [64345.212906] drm_helper_encoder_dpms+0x34/0x70 [drm_kms_helper] [64345.212911] drm_helper_connector_dpms+0xbe/0x120 [drm_kms_helper] [64345.212927] drm_connector_set_obj_prop+0x56/0x70 [drm] [64345.212939] drm_mode_obj_set_property_ioctl+0x298/0x2c0 [drm] [64345.212945] ? futex_wait_queue_me+0xc6/0x110 [64345.212956] ? drm_connector_set_obj_prop+0x70/0x70 [drm] [64345.212966] drm_connector_property_set_ioctl+0x39/0x60 [drm] [64345.212978] drm_ioctl_kernel+0xa8/0xe0 [drm] [64345.212987] drm_ioctl+0x2f4/0x390 [drm] [64345.212998] ? drm_connector_set_obj_prop+0x70/0x70 [drm] [64345.213002] ? pipe_read+0x27f/0x2d0 [64345.213016] radeon_drm_ioctl+0x44/0x80 [radeon] [64345.213021] do_vfs_ioctl+0x9a/0x600 [64345.213027] ksys_ioctl+0x35/0x60 [64345.213031] __x64_sys_ioctl+0x11/0x20 [64345.213034] do_syscall_64+0x3d/0x110 [64345.213038] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [64345.213042] RIP: 0033:0x7fe1dd7c4dd7 [64345.213045] Code: 00 00 00 48 8b 05 c1 80 2b 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 80 2b 00 f7 d8 64 89 01 48 [64345.213048] RSP: 002b:00007ffd547c0e68 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [64345.213052] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1dd7c4dd7 [64345.213055] RDX: 00007ffd547c0ea0 RSI: 00000000c01064ab RDI: 000000000000000f [64345.213057] RBP: 00007ffd547c0ea0 R08: 000055c032ba8b30 R09: 0000000000000001 [64345.213060] R10: 0000000000000000 R11: 0000000000003246 R12: 00000000c01064ab [64345.213062] R13: 000000000000000f R14: 000055c032b291d0 R15: 000055c0317f8580 [64345.213065] Modules linked in: cpufreq_conservative cpufreq_userspace cpufreq_powersave nfsv4 nfsd auth_rpcgss nfs_acl nfs lockd grace fscache sunrpc af_packet dm_crypt dm_mod dax coretemp applesmc input_polldev led_class kvm_intel btusb btbcm kvm btintel snd_hda_codec_cirrus irqbypass snd_hda_codec_generic bluetooth rfkill ecdh_generic ecc snd_usb_audio snd_hda_codec_hdmi snd_usbmidi_lib uvcvideo snd_rawmidi videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 joydev videodev videobuf2_common evdev snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore apple_bl button ext4 crc32c_generic crc16 mbcache jbd2 hid_apple hid_appleir hid_generic usbhid hid usb_storage sg sr_mod cdrom sd_mod radeon i2c_algo_bit backlight uhci_hcd aesni_intel xhci_pci ehci_pci drm_kms_helper syscopyarea sysfillrect aes_x86_64 sysimgblt xhci_hcd glue_helper ehci_hcd fb_sys_fops crypto_simd ahci ttm cryptd libahci firewire_ohci drm firewire_core crc_itu_t usbcore usb_common i2c_core [64345.213111] CR2: 00000000000003e8 [64345.213115] ---[ end trace ef0d782ef71c1445 ]--- [64345.213119] RIP: 0010:mutex_lock+0x14/0x30 [64345.213123] Code: 84 00 00 00 00 00 be 02 00 00 00 e9 16 fb ff ff 66 0f 1f 44 00 00 53 48 89 fb e8 f7 f0 ff ff 31 c0 65 48 8b 14 25 c0 5c 01 00 48 0f b1 13 75 02 5b c3 48 89 df 5b eb cd 0f 1f 00 66 2e 0f 1f [64345.213125] RSP: 0018:ffffc900006c7a10 EFLAGS: 00010246 [64345.213128] RAX: 0000000000000000 RBX: 00000000000003e8 RCX: ffffc900006c7ab7 [64345.213131] RDX: ffff88845aca0000 RSI: 0000000000000008 RDI: 00000000000003e8 [64345.213133] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [64345.213135] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [64345.213138] R13: 00000000fffffffb R14: 00000000ffffffb9 R15: 0000000000000000 [64345.213141] FS: 00007fe1dfffca80(0000) GS:ffff88845f940000(0000) knlGS:0000000000000000 [64345.213144] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [64345.213146] CR2: 00000000000003e8 CR3: 0000000451d00002 CR4: 00000000000606a0 [64426.994020] elogind[3566]: New session c11 of user brad. [64451.359942] switching from power state: [64451.359952] ui class: battery [64451.359955] internal class: none [64451.359958] caps: [64451.359961] uvd vclk: 0 dclk: 0 [64451.359964] power level 0 sclk: 10000 mclk: 14900 vddc: 900 vddci: 950 [64451.359967] power level 1 sclk: 10000 mclk: 14900 vddc: 900 vddci: 950 [64451.359970] power level 2 sclk: 10000 mclk: 14900 vddc: 900 vddci: 950 [64451.359971] status: c [64451.359974] switching to power state: [64451.359976] ui class: performance [64451.359978] internal class: none [64451.359980] caps: [64451.359983] uvd vclk: 0 dclk: 0 [64451.359986] power level 0 sclk: 10000 mclk: 14900 vddc: 900 vddci: 950 [64451.359988] power level 1 sclk: 39800 mclk: 90000 vddc: 1000 vddci: 1100 [64451.359991] power level 2 sclk: 68000 mclk: 90000 vddc: 1100 vddci: 1100 [64451.359992] status: r [64464.740392] elogind[3566]: Received signal 15 [TERM]