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Fix for sporadic segfault with MYSQLI_OPT_INT_AND_FLOAT_NATIVE #2250

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Fix for sporadic segfault with MYSQLI_OPT_INT_AND_FLOAT_NATIVE #2250

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10 changes: 8 additions & 2 deletions ext/mysqlnd/mysqlnd_wireprotocol.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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)) {
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