lxc_user_nic: free_groupnames: fix

lxc_user_nic was segfaulting: lxc-user-nic[9761]: segfault at 29 ip 00007f3fb2346872 sp 00007ffdd17b2dd0 error 4 in libc-2.21.so[7f3fb22c2000+1c0000 This patch fixes it. Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

lxc_user_nic: free_groupnames: fix
d791668b · Serge Hallyn · 2c7a5008 · d791668b
Commit d791668b authored Jun 24, 2015 by Serge Hallyn
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lxc_user_nic.c src/lxc/lxc_user_nic.c +5 -3

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--- a/src/lxc/lxc_user_nic.c
+++ b/src/lxc/lxc_user_nic.c
@@ -99,9 +99,11 @@ static char *get_username(void)
 static void free_groupnames(char **groupnames)
 {
-	char **group;
+	int i;
-	for (group=groupnames; group != NULL; group++)
+	if (!groupnames)
-		free(*group);
+		return;
+	for (i = 0; groupnames[i]; i++)
+		free(groupnames[i]);
 	free(groupnames);
 }