6.6-stable review patch. If anyone has any objections, please let me know.
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From: Paolo Abeni pabeni@redhat.com
commit a71d0908e32f3dd41e355d83eeadd44d94811fd6 upstream.
The helper waiting for a listener port can match any socket whose hexadecimal representation of source or destination addresses matches that of the given port.
Additionally, any socket state is accepted.
All the above can let the helper return successfully before the relevant listener is actually ready, with unexpected results.
So far I could not find any related failure in the netdev CI, but the next patch is going to make the critical event more easily reproducible.
Address the issue matching the port hex only vs the relevant socket field and additionally checking the socket state for TCP sockets.
Fixes: 3bdd9fd29cb0 ("selftests/net: synchronize udpgro tests' tx and rx connection") Signed-off-by: Paolo Abeni pabeni@redhat.com Link: https://lore.kernel.org/r/192b3dbc443d953be32991d1b0ca432bd4c65008.170773108... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/net/net_helper.sh | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
--- a/tools/testing/selftests/net/net_helper.sh +++ b/tools/testing/selftests/net/net_helper.sh @@ -8,13 +8,16 @@ wait_local_port_listen() local listener_ns="${1}" local port="${2}" local protocol="${3}" - local port_hex + local pattern local i
- port_hex="$(printf "%04X" "${port}")" + pattern=":$(printf "%04X" "${port}") " + + # for tcp protocol additionally check the socket state + [ ${protocol} = "tcp" ] && pattern="${pattern}0A" for i in $(seq 10); do - if ip netns exec "${listener_ns}" cat /proc/net/"${protocol}"* | \ - grep -q "${port_hex}"; then + if ip netns exec "${listener_ns}" awk '{print $2" "$4}' \ + /proc/net/"${protocol}"* | grep -q "${pattern}"; then break fi sleep 0.1