Bug 934479

Summary:	sys-kernel/vanilla-sources-6.9.5 segfaults on resume after suspend on Ryzen Zen4
Product:	Gentoo Linux	Reporter:	Mustafa Ahmed <pfmffhkt>
Component:	Current packages	Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel>
Status:	UNCONFIRMED ---
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Mustafa Ahmed 2024-06-17 21:23:30 UTC

Rebuilt the kernel with an existing config from 6.9.4 and didn't notice anything wrong, until the next day when I resumed after suspending overnight. 
Some execs like vim were segfaulting, whereas rsyng was giving bogus errors. This only happened with execs compiled with zen4 flags. I tested the same execs for a different CPU (Skylake) on the same CPU and no segfault.

No new hardware attached.

Reproducible: Always

Steps to Reproduce:
1. Run 6.9.5 kernel on ryzen
2. suspend
3. resume

Comment 1 Greg Kubaryk 2024-06-17 22:46:18 UTC

Gentoo doesn't make any changes to the vanilla sources, so hopefully you've reported this upstream. We need at least an 'emerge --info' for the Gentoo side.

Comment 2 Mike Pagano gentoo-dev

2024-06-21 11:57:28 UTC

I wonder what's in the segfault