This is a note to let you know that I've just added the patch titled
selftests: xsk: Disable IPv6 on VETH1
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-xsk-disable-ipv6-on-veth1.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9f0f7edbd41a5299b7b24e5bb6ad9ea8a6e40d8f
Author: Kal Conley <kal.conley@xxxxxxxxxxx>
Date: Wed Apr 5 10:29:04 2023 +0200
selftests: xsk: Disable IPv6 on VETH1
[ Upstream commit f2b50f17268390567bc0e95642170d88f336c8f4 ]
This change fixes flakiness in the BIDIRECTIONAL test:
# [is_pkt_valid] expected length [60], got length [90]
not ok 1 FAIL: SKB BUSY-POLL BIDIRECTIONAL
When IPv6 is enabled, the interface will periodically send MLDv1 and
MLDv2 packets. These packets can cause the BIDIRECTIONAL test to fail
since it uses VETH0 for RX.
For other tests, this was not a problem since they only receive on VETH1
and IPv6 was already disabled on VETH0.
Fixes: a89052572ebb ("selftests/bpf: Xsk selftests framework")
Signed-off-by: Kal Conley <kal.conley@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230405082905.6303-1-kal.conley@xxxxxxxxxxx
Signed-off-by: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
index cd7bf32e6a173..661995af75602 100755
--- a/tools/testing/selftests/bpf/test_xsk.sh
+++ b/tools/testing/selftests/bpf/test_xsk.sh
@@ -106,6 +106,7 @@ setup_vethPairs() {
ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4
if [ -f /proc/net/if_inet6 ]; then
echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
+ echo 1 > /proc/sys/net/ipv6/conf/${VETH1}/disable_ipv6
fi
if [[ $verbose -eq 1 ]]; then
echo "setting up ${VETH1}: namespace: ${NS1}"
