[PATCH net-next] selftests: net: do not detect PPPoX loopback
Qingfang Deng <[email protected]> Wed, 3 Jun 2026 14:17:44 +0800
| Newsgroups | org.kernel.vger.linux-ppp,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
By default, pppd attempts to detect loopbacks on the underlying interface using a pseudo-randomly generated magic number and checks if the same value is received. The seed for the PRNG is a hash of hostname XOR current time XOR pid, which is likely to collide on NIPA, causing false positives. Disable magic number generation. Reported-by: Matthieu Baerts <[email protected]> Fixes: 7af2a94f4dcf ("selftests: net: add tests for PPPoL2TP") Signed-off-by: Qingfang Deng <[email protected]> --- tools/testing/selftests/net/ppp/pppoe-server-options | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/net/ppp/pppoe-server-options b/tools/testing/selftests/net/ppp/pppoe-server-options index 66c8c9d319e9..cd586be7061b 100644 --- a/tools/testing/selftests/net/ppp/pppoe-server-options +++ b/tools/testing/selftests/net/ppp/pppoe-server-options @@ -1,2 +1,3 @@ noauth noipdefault +nomagic -- 2.43.0