On Fri, May 30, 2025 at 12:09:04PM -0700, Nathan Chancellor wrote:

On Thu, May 29, 2025 at 10:12:22PM -0700, Kees Cook wrote:

quoted

On Thu, May 29, 2025 at 09:06:46PM -0300, Thiago Jung Bauermann wrote:

quoted

This commit was reported by our CI as breaking the allmodconfig build for
the arm and arm64 architectures when using GCC 15. This is due to
https://github.com/KSPP/linux/issues/367 :

00:05:08 arch/arm64/kernel/kexec_image.c:132:14: internal compiler error: in comptypes_check_enum_int, at c/c-typeck.cc:1519
00:05:08   132 | const struct kexec_file_ops kexec_image_ops = {
00:05:08       |              ^~~~~~~~~~~~~~

I'm not able to reproduce this. Which specific version of GCC 15 and
on what distro are you seeing this?

It looks like this was also reported to Debian (I originally noticed it
in the #gcc channel on OFTC a couple of weeks ago but forgot to mention
it):

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1104745

It looks like the difference might be whether GCC was built with
additional checks or not based on the last couple of comments in that
bug.

Proposed fix here:
https://lore.kernel.org/lkml/20250530221824.work.623-kees@kernel.org/ (local)

-- 
Kees Cook