tests: skip static children tests when YAMA ptrace_scope is enabled

Since we can't trace static children under certain YAMA ptrace_scope
settings, skip tests that rely on that functionality.

Closes: https://bugs.gentoo.org/821418
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

3 files changed, 19 insertions, 1 deletions

diff --git a/tests/atlocal.in b/tests/atlocal.in
index e8213c0..adf3bad 100644
--- a/tests/atlocal.in
+++ b/tests/atlocal.in
@@ -42,5 +42,14 @@ case "${MAKEFLAGS}" in
 	;;
 esac
 
+# Figure out currently YAMA ptrace_scope restriction level.
+at_yama_ptrace_scope=$(cat /proc/sys/kernel/yama/ptrace_scope 2>/dev/null || echo 0)
+if [ ${at_yama_ptrace_scope} -gt 0 ] ; then
+	if [ "$(id -u)" -eq 0 ] ; then
+		at_yama_ptrace_scope=0
+	fi
+fi
+export at_yama_ptrace_scope
+
 # This script must finish with ($? == 0) else the autotest runner gets upset.
 :
diff --git a/tests/script-17.sh b/tests/script-17.sh
index a8a8f51..83c51f9 100755
--- a/tests/script-17.sh
+++ b/tests/script-17.sh
@@ -10,7 +10,13 @@ adddeny "${PWD}/subdir"
 for child in 0 1 2 3 4 5 ; do
 	fork-follow_tst ${child} subdir/dyn${child} || exit $?
 done
-for child in 0 1 2 3 4 5 ; do
+
+depth="0"
+# We can't trace static children currently with YAMA ptrace_scope 1+.
+if [ ${at_yama_ptrace_scope} -eq 0 ] ; then
+	depth="${depth} 1 2 3 4 5"
+fi
+for child in ${depth} ; do
 	fork-follow_static_tst ${child} subdir/static${child} || exit $?
 done
 
diff --git a/tests/script-8.sh b/tests/script-8.sh
index 6d9de55..9d8ca11 100755
--- a/tests/script-8.sh
+++ b/tests/script-8.sh
@@ -6,6 +6,9 @@ sigsuspend-zsh_tst
 d=$?
 echo "ret = $d"
 
+# We can't trace static children currently with YAMA ptrace_scope 1+.
+[ ${at_yama_ptrace_scope} -gt 0 ] && exit ${d}
+
 sigsuspend-zsh_static_tst
 s=$?
 echo "ret = $s"