commit 1327c2eea9c7ca074d88bb167bd4c35338d2de0b
Author:     Alvaro Herrera <alvherre@alvh.no-ip.org>
AuthorDate: Tue Jan 10 02:46:42 2017 -0300
CommitDate: Tue Jan 10 02:46:42 2017 -0300

    Fix overflow check in StringInfo
    
    A thinko I introduced in fa2fa9955280.  Also, amend a similarly broken
    comment.
    
    Report and patch by Daniel Vérité.
    Discussion: https://postgr.es/m/1706e85e-60d2-494e-8a64-9af1e1b2186e@manitou-mail.org

diff --git a/src/backend/lib/stringinfo.c b/src/backend/lib/stringinfo.c
index bdc204e..11d751a 100644
--- a/src/backend/lib/stringinfo.c
+++ b/src/backend/lib/stringinfo.c
@@ -313,19 +313,19 @@ enlargeStringInfo(StringInfo str, int needed)
 	 * for efficiency, double the buffer size each time it overflows.
 	 * Actually, we might need to more than double it if 'needed' is big...
 	 */
-	newlen = 2 * str->maxlen;
-	while (needed > newlen)
+	newlen = 2 * (Size) str->maxlen;
+	while ((Size) needed > newlen)
 		newlen = 2 * newlen;
 
 	/*
 	 * Clamp to the limit in case we went past it.  Note we are assuming here
-	 * that limit <= INT_MAX/2, else the above loop could overflow.  We will
+	 * that limit <= UINT_MAX/2, else the above loop could overflow.  We will
 	 * still have newlen >= needed.
 	 */
 	if (newlen > limit)
 		newlen = limit;
 
-	str->data = (char *) repalloc_huge(str->data, (Size) newlen);
+	str->data = (char *) repalloc_huge(str->data, newlen);
 
 	str->maxlen = newlen;
 }