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-dri@kernel-bugs.osdl.org Reporter: shlomo@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 [...]