The script uses set -euo pipefail, so when busywait times out waiting for the netconsole message to arrive, it returns 1 and the script exits immediately without printing any error message. As reported by Jakub, this makes failures hard to diagnose since the test reports exit=1 with no explanation. Handle the busywait failure explicitly so that a FAIL message is printed before exiting. This is how it looks like now: Running with target mode: basic (ipv6) [ 167.452561] netconsole selftest: netcons_QdMay FAIL: Timed out waiting (20000 ms) for netconsole message in /tmp/netcons_QdMay The remaining silent failures under set -e can only happen during the setup phase (netdevsim creation, interface configuration, configfs writes). So, it is not expected to have any silent failure once the test starts. Note that this issue might be less frequent now, since commit a68a9bd086c28 ("selftests: netconsole: Increase port listening timeout") increased the timeout that _might_ have been the root cause of these random failures in NIPA. Signed-off-by: Breno Leitao --- tools/testing/selftests/drivers/net/netconsole/netcons_basic.sh | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/netconsole/netcons_basic.sh b/tools/testing/selftests/drivers/net/netconsole/netcons_basic.sh index 59cf10013ecd5..7976206523b2c 100755 --- a/tools/testing/selftests/drivers/net/netconsole/netcons_basic.sh +++ b/tools/testing/selftests/drivers/net/netconsole/netcons_basic.sh @@ -58,7 +58,11 @@ do # Send the message echo "${MSG}: ${TARGET}" > /dev/kmsg # Wait until socat saves the file to disk - busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" + if ! busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" + then + echo "FAIL: Timed out waiting (${BUSYWAIT_TIMEOUT} ms) for netconsole message in ${OUTPUT_FILE}" >&2 + exit "${ksft_fail}" + fi # Make sure the message was received in the dst part # and exit --- base-commit: 01857fc712f6469cab9cc578120cdc80f1c2a634 change-id: 20260302-netconsole_test_verbose-367afde9a7d4 Best regards, -- Breno Leitao