commit df7d2d83345e2e547c2cb3a83d3a8a099339a742
Author: Jan Synacek <jsynacek@redhat.com>
Date:   Fri Jan 6 13:28:04 2017 +0100

    ping: prevent possible double free after cap_free()
    
    Original bugreport: https://bugzilla.redhat.com/show_bug.cgi?id=1410114

diff --git a/ping_common.c b/ping_common.c
index 0b32d6a..b0825e3 100644
--- a/ping_common.c
+++ b/ping_common.c
@@ -159,6 +159,7 @@ int modify_capability(cap_value_t cap, cap_flag_value_t on)
 	}
 
 	cap_free(cap_p);
+	cap_p = NULL;
 
 	rc = 0;
 out: