Failures in GitHub Actions linux-leaks and linux-asan-ubsan

[Philippe Blain <levraiphilippeblain@gmail.com>]

Hi everyone,

You might have noticed that the linux-leaks and linux-asan-ubsan
jobs in GitHub Actions started failing last week. I investigated 
this so I'm sharing my findinds in case it helps.

The failures are due to the new ubuntu-22.04 GitHub Actions image
(release 20240310.1.0, [1]) which uses a kernel where ASLR is configured
in a way that is incompatible with ASan and LSan as used in 
the GCC and Clang versions in that image. More info can be found
in [2] and [3] and pages linked there.

A workaround was already implemented in the image generation process 
[4], so the next version of the image should work. I think the images
are released weekly. We could maybe add the same sysctl command to reduce
the entropy to our YAML file, or we could live with it for the next week
or so while waiting for the next image to roll out.

Cheers,

Philippe.

[1] https://github.com/actions/runner-images/commit/d67fa31aeeec3cf0d666d0eb2976b683471c6b90
[2] https://github.com/actions/runner-images/issues/9491#issuecomment-1989718917
[3] https://github.com/actions/runner-images/issues/9524#issuecomment-2002065399
[4] https://github.com/actions/runner-images/pull/9513