From a4733c7fde1764dd42a24412c744794410e570ba Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@samba.org>
Date: Wed, 18 Jan 2017 16:43:56 +0100
Subject: libcli: Add an overflow check

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
---
 libcli/security/util_sid.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'libcli/security')

diff --git a/libcli/security/util_sid.c b/libcli/security/util_sid.c
index 2ab47f2db2c..ac448765777 100644
--- a/libcli/security/util_sid.c
+++ b/libcli/security/util_sid.c
@@ -339,6 +339,10 @@ NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 {
 	struct dom_sid *tmp;
 
+	if ((*num) == UINT32_MAX) {
+		return NT_STATUS_INTEGER_OVERFLOW;
+	}
+
 	tmp = talloc_realloc(mem_ctx, *sids, struct dom_sid, (*num)+1);
 	if (tmp == NULL) {
 		*num = 0;
-- 
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