[LTP] [PATCH] testcases: cve-2017-2671: Set attempts according to cpus

[Mylène Josserand]

This test tries to run commands with 0x8000 attempts.
In a slow system platform, it leads to a failure
because of a timeout even when it is configured with
LTP_TIMEOUT_MUL=10.

This commit adds a way to configure the number of attempts
according to the number of CPUs.
In case of 1 CPU and a slow platform, using 0x2000 attempts
with a LTP_TIMEOUT_MUL=3 make the test pass.

Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
---
 testcases/cve/cve-2017-2671.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/testcases/cve/cve-2017-2671.c b/testcases/cve/cve-2017-2671.c
index b0471bfff..a56bb45a8 100644
--- a/testcases/cve/cve-2017-2671.c
+++ b/testcases/cve/cve-2017-2671.c
@@ -49,7 +49,7 @@
 
 #include "tst_fuzzy_sync.h"
 
-#define ATTEMPTS 0x80000
+#define ATTEMPTS 0x2000
 #define PING_SYSCTL_PATH "/proc/sys/net/ipv4/ping_group_range"
 
 static int sockfd;
@@ -109,9 +109,13 @@ static void *connect_b(void * param LTP_ATTRIBUTE_UNUSED)
 
 static void run(void)
 {
-	int i;
+	int i, total_cpus;
 
-	for (i = 0; i < ATTEMPTS; i++) {
+	total_cpus = tst_ncpus();
+	if (total_cpus > 4)
+		total_cpus = 4;
+
+	for (i = 0; i < ATTEMPTS * total_cpus; i++) {
 		SAFE_CONNECT(sockfd,
 			     (struct sockaddr *)&iaddr, sizeof(iaddr));
 
-- 
2.11.0