On Wed, 2025-06-11 at 10:54 +0800, Yafang Shao wrote:
[...]
> > + config = gzopen("/proc/config.gz", "rb");
>
> The /proc/config.gz file is not enabled in certain kernel releases.
> Should we also check "/boot/config-$(uname -r)" as an alternative?
>
Oh, my... It's a zoo, on Fedora the config location is:
/usr/lib/modules/$(uname -r)/config
Tbh, I was fixing a problem with tests execution in a specific
environment. Adding a list of common locations for config is an
option.
Another option I tried but discarded is [1], where
kernel/cpu.c:cpu_mitigations variable is read directly by a BPF
program. But this is probably too heavy-handed.
[1] https://github.com/eddyz87/bpf/tree/better-unpriv-disabled-detector
[...]
