[255799.889315] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon]
[255799.889326] CPU: 2 PID: 8642 Comm: kworker/2:0 Not tainted 5.3.1+ #13
[255799.889327] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 87.0.0.0.0 06/14/2019
[255799.889339] Workqueue: events radeon_dp_work_func [radeon]
[255799.889341] Call Trace:
[255799.889346]  dump_stack+0x46/0x5b
[255799.889350]  panic+0xf3/0x288
[255799.889365]  ? radeon_dp_needs_link_train+0x69/0x70 [radeon]
[255799.889367]  __stack_chk_fail+0x10/0x10
[255799.889379]  radeon_dp_needs_link_train+0x69/0x70 [radeon]
[255799.889391]  radeon_connector_hotplug+0xa4/0xd0 [radeon]
[255799.889407]  radeon_dp_work_func+0x28/0x40 [radeon]
[255799.889412]  process_one_work+0x1b4/0x330
[255799.889415]  worker_thread+0x44/0x3d0
[255799.889418]  kthread+0xeb/0x120
[255799.889422]  ? process_one_work+0x330/0x330
[255799.889424]  ? kthread_park+0xa0/0xa0
[255799.889428]  ret_from_fork+0x1f/0x30
[255799.889434] ------------[ cut here ]------------
[255799.889439] sched: Unexpected reschedule of offline CPU#0!
[255799.889444] WARNING: CPU: 7 PID: 4699 at arch/x86/kernel/smp.c:126 native_smp_send_reschedule+0x2c/0x30
[255799.889446] 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 btusb applesmc input_polldev btbcm btintel led_class coretemp bluetooth kvm_intel rfkill snd_usb_audio kvm snd_hda_codec_cirrus ec
dh_generic irqbypass snd_hda_codec_generic ecc snd_usbmidi_lib joydev snd_rawmidi uvcvideo videobuf2_vmalloc videobuf2_memops snd_hda_codec_hdmi videobuf2_v4
l2 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 crc
16 mbcache jbd2 amdgpu gpu_sched hid_apple hid_appleir hid_generic usbhid hid usb_storage sg sr_mod sd_mod cdrom radeon i2c_algo_bit backlight aesni_intel dr
m_kms_helper aes_x86_64 syscopyarea sysfillrect sysimgblt fb_sys_fops uhci_hcd xhci_pci glue_helper ahci ehci_pci crypto_simd libahci ttm xhci_hcd ehci_hcd c
ryptd firewire_ohci drm firewire_core crc_itu_t usbcore i2c_core
[255799.889472]  usb_common
[255799.889477] CPU: 7 PID: 4699 Comm: AudioIPC Server Not tainted 5.3.1+ #13
[255799.889479] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 87.0.0.0.0 06/14/2019
[255799.889481] RIP: 0010:native_smp_send_reschedule+0x2c/0x30
[255799.889483] Code: 48 0f a3 05 6e 5e c3 00 73 12 48 8b 05 3d d2 b0 00 be fd 00 00 00 48 8b 40 30 ff e0 89 fe 48 c7 c7 90 87 ae 81 e8 74 a3 01 00 <0f> 0b c
3 90 8b 05 a2 a1 f2 00 85 c0 75 34 41 54 55 53 89 fb 0f b6
[255799.889485] RSP: 0018:ffffc90000d37d30 EFLAGS: 00010082
[255799.889486] RAX: 0000000000000000 RBX: ffff88845f8204c0 RCX: 0000000000000006
[255799.889487] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff88845f9d60e0
[255799.889489] RBP: ffff88845a64d240 R08: 0000000000690000 R09: 00000000000007b9
[255799.889490] R10: ffffc90000d37cd0 R11: 0000000000000000 R12: 0000000000000246
[255799.889491] R13: 0000000000000000 R14: ffff88845f8204c0 R15: 0000000000000000
[255799.889493] FS:  00007f32da7fc700(0000) GS:ffff88845f9c0000(0000) knlGS:0000000000000000
[255799.889494] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[255799.889495] CR2: 00007f5c864b7000 CR3: 000000045a51a001 CR4: 00000000000606a0
[255799.889497] Call Trace:
[255799.889499]  check_preempt_curr+0x49/0x80
[255799.889502]  ttwu_do_wakeup.isra.9+0xd/0x80
[255799.889503]  try_to_wake_up+0x2e8/0x390
[255799.889505]  wake_up_q+0x3a/0x70
[255799.889507]  do_futex+0x818/0xb50
[255799.889509]  __se_sys_futex+0x75/0x160
[255799.889512]  ? do_epoll_wait+0x85/0xc0
[255799.889514]  do_syscall_64+0x3d/0x110
[255799.889516]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[255799.889518] RIP: 0033:0x7f32f2cc0825
[255799.889519] Code: 00 00 00 74 17 49 8b 48 20 44 8b 59 10 41 83 e3 30 41 83 fb 20 74 1e be 85 00 00 00 41 ba 01 00 00 00 41 b9 01 00 00 04 0f 05 <48> 3d 01 f0 ff ff 73 1f 31 c0 c3 be 8c 00 00 00 49 89 c8 4d 31 d2
[255799.889521] RSP: 002b:00007f32da7fbc38 EFLAGS: 00000283 ORIG_RAX: 00000000000000ca
[255799.889523] RAX: ffffffffffffffda RBX: 00007f32dae4d840 RCX: 00007f32f2cc0825
[255799.889524] RDX: 0000000000000001 RSI: 0000000000000085 RDI: 00007f32dae4ecd4
[255799.889526] RBP: 00007f32dae51000 R08: 00007f32dae4ecd0 R09: 0000000004000001
[255799.889527] R10: 0000000000000001 R11: 0000000000000283 R12: 0000000000000400
[255799.889528] R13: 00007f32f1a589c0 R14: 00007f32dae19000 R15: 0000000000000000
[255799.889530] ---[ end trace 86a23023b5e1f46d ]---
[255799.889532] Kernel Offset: disabled
[255799.889535] ---[ end Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: radeon_dp_needs_link_train+0x69/0x70 [radeon] ]---