selftests/bpf: fix race in flow dissector tests
Since the "last_dissection" map holds only the flow keys for the most recent packet, there is a small race in the skb-less flow dissector tests if a new packet comes between transmitting the test packet, and reading its keys from the map. If this happens, the test packet keys will be overwritten and the test will fail. Changing the "last_dissection" map to a hash map, keyed on the source/dest port pair resolves this issue. Additionally, let's clear the last test results from the map between tests to prevent previous test cases from interfering with the following test cases. Fixes: 0905beec ("selftests/bpf: run flow dissector tests in skb-less mode") Signed-off-by: NPetar Penkov <ppenkov@google.com> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Showing
想要评论请 注册 或 登录