netdev - [PATCH net] selftests/net: rxtimestamp: Fix an off by one

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Message-ID: <20171005125347.otplfss4mo7hfopv@mwanda>
Date:   Thu, 5 Oct 2017 15:53:47 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Shuah Khan <shuah@...nel.org>, Mike Maloney <maloney@...gle.com>
Cc:     Willem de Bruijn <willemb@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kselftest@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH net] selftests/net: rxtimestamp: Fix an off by one

The > should be >= so that we don't write one element beyond the end of
the array.

Fixes: 16e781224198 ("selftests/net: Add a test to validate behavior of rx timestamps")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/tools/testing/selftests/networking/timestamping/rxtimestamp.c b/tools/testing/selftests/networking/timestamping/rxtimestamp.c
index 00f286661dcd..dd4162fc0419 100644
--- a/tools/testing/selftests/networking/timestamping/rxtimestamp.c
+++ b/tools/testing/selftests/networking/timestamping/rxtimestamp.c
@@ -341,7 +341,7 @@ int main(int argc, char **argv)
 			return 0;
 		case 'n':
 			t = atoi(optarg);
-			if (t > ARRAY_SIZE(test_cases))
+			if (t >= ARRAY_SIZE(test_cases))
 				error(1, 0, "Invalid test case: %d", t);
 			all_tests = false;
 			test_cases[t].enabled = true;