Decrease vm.mmap_rnd_bit to prevent ASLR ASAN issues

[jes: to allow the ASAN/fuzz jobs to succeed, we need to take extra
steps for a couple of days due to a change of configuration in the
kernel version used in the GitHub Actions runner images.]

Based-on: actions/runner-images#9513
Signed-off-by: Johannes Schindelin <[email protected]>

Author: mikhailkoliada

ci/lib.sh

@@ -251,6 +251,13 @@ then
 
 	GIT_TEST_OPTS="--github-workflow-markup"
 	JOBS=10
+
+	case "$jobname,$GITHUB_JOB" in
+	linux*-leaks,*|linux*asan*|*,fuzz*)
+		# https://github.com/actions/runner-images/issues/9491
+		sudo sysctl vm.mmap_rnd_bits=28
+		;;
+	esac
 elif test true = "$GITLAB_CI"
 then
 	CI_TYPE=gitlab-ci