Bug 219685

Summary:	[REGRESSION] WARNING: WARNING: Bad or missing .orc_unwind table. Disabling unwinder.
Product:	Linux	Reporter:	Klaus Kusche (klaus.kusche)
Component:	Kernel	Assignee:	Virtual assignee for kernel bugs (linux-kernel)
Status:	RESOLVED ANSWERED
Severity:	normal
Priority:	P3
Hardware:	All
OS:	Linux
Kernel Version:		Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	.config

Description Klaus Kusche 2025-01-12 10:41:53 UTC

Gentoo linux on x86_64, kernel gentoo-sources 6.12.9,
locally compiled with clang+lld 19.1.6 and full lto, .config attached,
CONFIG_UNWINDER_ORC=y.

dmesg says "WARNING: WARNING: Bad or missing .orc_unwind table.  Disabling unwinder." when booting.

The message was *not* present with my previous 6.12.7 and clang 18.*.
I don't know if linux 6.12.7-->9 or clang 18-->19 caused it,
I did both at the same time and don't have the old versions any longer.

Comment 1 Klaus Kusche 2025-01-12 10:42:46 UTC

Created attachment 307478 [details]
.config

Comment 2 Klaus Kusche 2025-01-12 11:02:04 UTC

Rechecked old logs: Message occurred on 6.12.7-->8 and clang 18-->19,
not on 6.12.7-->9.

Comment 3 Artem S. Tashkinov 2025-01-13 07:54:48 UTC

This bug report will die here.

Find the relevant people, send your message to LKML and CC them.

Finding the bad commit using git bisect could prove useful.