Comment # 6
on bug 111659
from Brad Campbell
I thought given these generally result in a stack canary I'd try something different. Upgraded to latest linus-git and disabled the stack protector. It did take a bit longer to hit, but we got there. [ 8044.605803] do_IRQ: 2.205 No irq handler for vector [ 8044.605814] do_IRQ: 2.233 No irq handler for vector [ 8044.605821] invalid opcode: 0000 [#1] SMP [ 8044.605824] CPU: 2 PID: 1476 Comm: kworker/2:2 Not tainted 5.4.0-rc4-bkc1+ #3 [ 8044.605826] Hardware name: Apple Inc. iMac12,2/Mac-942B59F58194171B, BIOS 82.0.0.0.0 09/25/2018 [ 8044.605847] Workqueue: events radeon_dp_work_func [radeon] [ 8044.605866] RIP: 0010:atom_op_move+0x124/0x1d0 [radeon] [ 8044.605869] Code: 20 c0 e8 03 83 e0 07 74 2e 8d 4a 03 83 c2 02 3c 04 0f 42 d1 41 89 14 24 eb 07 83 c2 02 41 89 14 24 c7 44 24 08 cd cd cd cd e9 <42> ff ff ff 83 c2 03 41 89 14 24 eb ea 83 c2 05 41 89 14 24 eb e1 [ 8044.605871] RSP: 0018:ffffc9000034fe50 EFLAGS: 00010292 [ 8044.605880] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000004 [ 8044.605881] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc9000034fe3a [ 8044.605883] RBP: ffff8882633d0000 R08: ffffffffa0201837 R09: 0000000000000006 [ 8044.605884] R10: 0000000000000006 R11: 000000000001a800 R12: ffff8882658eb1a0 [ 8044.605886] R13: 0000000000000000 R14: ffff888267b22c00 R15: 0000000000000000 [ 8044.605887] FS: 0000000000000000(0000) GS:ffff888267b00000(0000) knlGS:0000000000000000 [ 8044.605889] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8044.605890] CR2: 000031fd52e7a000 CR3: 00000001d1197002 CR4: 00000000000606a0 [ 8044.605892] Call Trace: [ 8044.605907] ? radeon_dp_work_func+0x28/0x40 [radeon] [ 8044.605911] ? process_one_work+0x1b4/0x330 [ 8044.605913] ? worker_thread+0x44/0x3d0 [ 8044.605923] ? set_worker_desc+0x90/0x90 [ 8044.605925] ? kthread+0xec/0x120 [ 8044.605927] ? kthread_create_worker_on_cpu+0x40/0x40 [ 8044.605930] ? ret_from_fork+0x1f/0x30 [ 8044.605932] Modules linked in: cpufreq_userspace cpufreq_powersave cpufreq_conservative nfsv4 nfsd auth_rpcgss nfs_acl nfs lockd grace fscache sunrpc af_packet dm_crypt dm_mod dax coretemp applesmc input_polldev kvm_intel led_class kvm irqbypass btusb btbcm uvcvideo btintel bluetooth videobuf2_vmalloc snd_usb_aud io videobuf2_memops rfkill videobuf2_v4l2 videodev snd_usbmidi_lib ecdh_generic videobuf2_common ecc joydev snd_hda_codec_cirrus snd_rawmidi snd_hda_codec_hdmi snd_hda_codec_generic evdev snd_hda_intel snd_intel_nhlt snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore button apple_bl ext4 crc32c_gen eric crc16 mbcache jbd2 netconsole configfs hid_apple hid_appleir usb_storage hid_generic usbhid hid sg sr_mod cdrom sd_mod aesni_intel glue_helper crypto_simd cryptd ahci libahci radeon xhci_pci xhci_hcd i2c_algo_bit backlight drm_kms_helper syscopyarea tg3 sysfillrect sysimgblt fb_sys_fops ehci_pci uhci_hcd libphy ttm ehci_hcd firewire_ohci firewire_core drm crc_itu_t [ 8044.605961] usbcore usb_common i2c_core [ 8044.605967] ---[ end trace 78992a27b7291279 ]--- [ 8044.605977] RIP: 0010:atom_op_move+0x124/0x1d0 [radeon] [ 8044.605979] Code: 20 c0 e8 03 83 e0 07 74 2e 8d 4a 03 83 c2 02 3c 04 0f 42 d1 41 89 14 24 eb 07 83 c2 02 41 89 14 24 c7 44 24 08 cd cd cd cd e9 <42> ff ff ff 83 c2 03 41 89 14 24 eb ea 83 c2 05 41 89 14 24 eb e1 [ 8044.605980] RSP: 0018:ffffc9000034fe50 EFLAGS: 00010292 [ 8044.605983] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000004 [ 8044.605985] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc9000034fe3a [ 8044.605986] RBP: ffff8882633d0000 R08: ffffffffa0201837 R09: 0000000000000006 [ 8044.605987] R10: 0000000000000006 R11: 000000000001a800 R12: ffff8882658eb1a0 [ 8044.605989] R13: 0000000000000000 R14: ffff888267b22c00 R15: 0000000000000000 [ 8044.605990] FS: 0000000000000000(0000) GS:ffff888267b00000(0000) knlGS:0000000000000000 [ 8044.605991] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8044.605993] CR2: 000031fd52e7a000 CR3: 00000001d1197002 CR4: 00000000000606a0 [ 8044.605994] Kernel panic - not syncing: Fatal exception [ 8044.606020] Kernel Offset: disabled [ 8044.606022] Rebooting in 10 seconds.. [ 8054.606406] ACPI MEMORY or I/O RESET_REG.
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