Fix for sporadic segfault with MYSQLI_OPT_INT_AND_FLOAT_NATIVE

Fixes bug #73800

news entry for PR #2250

Author: vanviegen

NEWS

@@ -20,6 +20,8 @@ PHP                                                                        NEWS
 - Mysqlnd:
   . Fixed issue with decoding BIT columns when having more than one rows in the
     result set. 7.0+ problem. (Andrey)
+  . Fixed bug #73800 (sporadic segfault with MYSQLI_OPT_INT_AND_FLOAT_NATIVE). 
+	(vanviegen)
 
 - PCRE:
   . Fixed bug #73612 (preg_*() may leak memory). (cmb)

ext/mysqlnd/mysqlnd_wireprotocol.c

@@ -1443,15 +1443,21 @@ php_mysqlnd_read_row_ex(MYSQLND_CONN_DATA * conn, MYSQLND_MEMORY_POOL * result_s
 	zend_bool first_iteration = TRUE;
 
 	DBG_ENTER("php_mysqlnd_read_row_ex");
-
+	
+	/*
+	 * We're allocating 1 extra byte, as php_mysqlnd_rowp_read_text_protocol_aux
+	 * needs to be able to add a terminating \0 for atoi/atof.
+	 */
+	prealloc_more_bytes++;
+	
 	/*
 	  To ease the process the server splits everything in packets up to 2^24 - 1.
 	  Even in the case the payload is evenly divisible by this value, the last
 	  packet will be empty, namely 0 bytes. Thus, we can read every packet and ask
 	  for next one if they have 2^24 - 1 sizes. But just read the header of a
 	  zero-length byte, don't read the body, there is no such.
 	*/
-
+	
 	*data_size = prealloc_more_bytes;
 	while (1) {
 		if (FAIL == mysqlnd_read_header(conn->net, &header, conn->stats, conn->error_info)) {