diff --git a/tools/testing/selftests/net/rds/run.sh b/tools/testing/selftests/net/rds/run.sh
index edc021f4dec9..c07e3785ff79 100755
--- a/tools/testing/selftests/net/rds/run.sh
+++ b/tools/testing/selftests/net/rds/run.sh
@@ -215,6 +215,12 @@ fi
 
 if [[ -n "$LOG_DIR" ]] && [ "$GENERATE_GCOV_REPORT" -eq 1 ]; then
        echo saving coverage data...
+
+       # Ensure debugfs is mounted before reading gcov data.
+       if ! mountpoint -q /sys/kernel/debug 2>/dev/null; then
+               mount -t debugfs debugfs /sys/kernel/debug 2>/dev/null || true
+       fi
+
        (set +x; cd /sys/kernel/debug/gcov; find ./* -name '*.gcda' | \
        while read -r f
        do
@@ -223,7 +229,7 @@ if [[ -n "$LOG_DIR" ]] && [ "$GENERATE_GCOV_REPORT" -eq 1 ]; then
 
        echo running gcovr...
        gcovr -s --html-details --gcov-executable "$GCOV_CMD" --gcov-ignore-parse-errors \
-             -o "${COVR_DIR}/gcovr" "${ksrc_dir}/net/rds/"
+             --root "${ksrc_dir}" -o "${COVR_DIR}/gcovr" "${ksrc_dir}/net/rds/"
 else
        echo "Coverage report will be skipped"
 fi