From: Tomas Hozza <thozza@redhat.com>
Date: Wed, 22 May 2013 12:54:30 +0000 (+0200)
Subject: tools: hv: Check return value of setsockopt call
X-Git-Tag: firefly_0821_release~176^2~5844^2~62
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=359016032239e0a585c01bffe04b72ab037e5de4;p=firefly-linux-kernel-4.4.55.git

tools: hv: Check return value of setsockopt call

Check return value of setsockopt call and if it fails print error
to the system log and exit with non-zero value.

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Acked-by:  K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index 5a1f6489d185..ae9aa1cd97fe 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -1457,7 +1457,13 @@ int main(void)
 		exit(EXIT_FAILURE);
 	}
 	nl_group = CN_KVP_IDX;
-	setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group));
+
+	if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) {
+		syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno));
+		close(fd);
+		exit(EXIT_FAILURE);
+	}
+
 	/*
 	 * Register ourselves with the kernel.
 	 */