https://bugzilla.kernel.org/show_bug.cgi?id=206519
Bug ID: 206519
Summary: [amdgpu] kernel NULL pointer dereference on shutdown
Product: Drivers
Version: 2.5
Kernel Version: 5.5.1.arch1-1, 5.5.3-arch1-1
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-...@kernel-bugs.osdl.org
Reporter: shl...@fastmail.com
Regression: No
Created attachment 287353
--> https://bugzilla.kernel.org/attachment.cgi?id=287353&action=edit
shutdown screen photo
When I try to power off my machine, it shows the usual shutdown messages and
the screens turn off, but the machine is still powered on. The virtual console
shows a kernel NULL pointer dereference at address 0.
I run Arch Linux.
The bug occurs even if I never run X. I can turn on the machine and immediately
try to shut it down, and the same bug still occurs.
This bug occurred since I upgraded linux 5.4.15.arch1-1 to 5.5.1.arch1-1. I now
run linux 5.5.3.arch1-1 and the bug still exists.
My graphics card is Gigabyte Radeon RX VEGA 56 GAMING OC 8G, connected to six
monitors.
A photo of the screen at shutdown is attached. I think these are the relevant
lines for this bug:
BUG: kernel NULL pointer dereference, address: 0 [...]
RIP: 0010:queue_work_on+0x17/0x40
Code: fd ff ff 44 89 e0 5d 41 5c c3 [...]
Call Trace:
handle_hpd_rx_irq+0x26e/0x320 [amdgpu]
? _raw_spin_unlock_irq+0x1d/0x30
dm_irq_work_func+0x49/0x60 [amdgpu]
process_one_work+0x1e1/0x3d0
[...]
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