[SRU Eoan 1/2] UBUNTU: SAUCE: selftests: net: ip_defrag: limit packet to 1000 fragments

[Thadeu Lima de Souza Cascardo]

BugLink: https://bugs.launchpad.net/bugs/1826848

The ip_defrag selftest will fail when run with a conntrack rule because
it might push more than a 1000 fragments through loopback. This will hit
the backlog limit, causing fragments to be dropped, leading to test
failures.

This is considered a real bug by Eric Dumazet, so the test change is
just a workaround so we can keep testing for other regressions while
avoiding this particular failure.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
Signed-off-by: Seth Forshee <seth.forshee at canonical.com>
---
 tools/testing/selftests/net/ip_defrag.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/ip_defrag.c b/tools/testing/selftests/net/ip_defrag.c
index c0c9ecb891e1..b53fb67f8e5e 100644
--- a/tools/testing/selftests/net/ip_defrag.c
+++ b/tools/testing/selftests/net/ip_defrag.c
@@ -36,7 +36,7 @@ const struct in6_addr addr6 = IN6ADDR_LOOPBACK_INIT;
 static int payload_len;
 static int max_frag_len;
 
-#define MSG_LEN_MAX	10000	/* Max UDP payload length. */
+#define MSG_LEN_MAX	8000	/* Max UDP payload length. */
 
 #define IP4_MF		(1u << 13)  /* IPv4 MF flag. */
 #define IP6_MF		(1)  /* IPv6 MF flag. */
-- 
2.25.1