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selftests: net: fix file owner for broadcast_ether_dst test

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Ensure the output file is always owned by root (even if tcpdump was
compiled with `--with-user`), by passing the `-Z root` argument when
invoking it.

Cc: stable@vger.kernel.org
Reported-by: Edoardo Canepa <edoardo.canepa@canonical.com>
Closes: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2129815
Fixes: bf59028ea8 ("selftests: net: add test for destination in broadcast packets")
Suggested-by: Edoardo Canepa <edoardo.canepa@canonical.com>
Tested-by: Ross Porter <ross.porter@canonical.com>
Signed-off-by: Ross Porter <ross.porter@canonical.com>
Link: https://patch.msgid.link/20260617061039.79717-2-ross.porter@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ross Porter 2026-06-17 18:10:39 +12:00 committed by Jakub Kicinski
parent 0ec4b78598
commit b8613e9792
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/net/broadcast_ether_dst.sh
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@ -44,7 +44,7 @@ test_broadcast_ether_dst() {
# tcpdump will exit after receiving a single packet
# timeout will kill tcpdump if it is still running after 2s
timeout 2s ip netns exec "${CLIENT_NS}" \
tcpdump -i link0 -c 1 -w "${CAPFILE}" icmp &> "${OUTPUT}" &
tcpdump -i link0 -c 1 -w "${CAPFILE}" -Z root icmp &> "${OUTPUT}" &
pid=$!
slowwait 1 grep -qs "listening" "${OUTPUT}"