thekid Wed, 16 Jun 2010 09:53:51 +0000
Revision: http://svn.php.net/viewvc?view=revision&revision=300492
Log:
- MFT: Fixed segmentation fault when reading rows
# Problem surfaces when using FreeTDS, ASE 12.5 and reading text fields
# with NULL values. This is essentially a workaround for a bug in Free-
# TDS which is not setting the NULL indicators correctly, but provides
# a protection against possible segfaults if any other driver ever does
# this again:-)
Changed paths:
U php/php-src/branches/PHP_5_2/ext/sybase_ct/php_sybase_ct.c
Modified: php/php-src/branches/PHP_5_2/ext/sybase_ct/php_sybase_ct.c
===================================================================
--- php/php-src/branches/PHP_5_2/ext/sybase_ct/php_sybase_ct.c 2010-06-16
09:49:25 UTC (rev 300491)
+++ php/php-src/branches/PHP_5_2/ext/sybase_ct/php_sybase_ct.c 2010-06-16
09:53:51 UTC (rev 300492)
@@ -1204,8 +1204,17 @@
}
default: {
- /* This indicates anything
else, return it as string */
-
ZVAL_STRINGL(&result->data[i][j], result->tmp_buffer[j], result->lengths[j]- 1,
1);
+ /* This indicates anything
else, return it as string
+ * FreeTDS doesn't correctly
set result->indicators[j] correctly
+ * for NULL fields in some
version in conjunction with ASE 12.5
+ * but instead sets
result->lengths[j] to 0, which would lead to
+ * a negative memory allocation
(and thus a segfault).
+ */
+ if (result->lengths[j] < 1) {
+
ZVAL_NULL(&result->data[i][j]);
+ } else {
+
ZVAL_STRINGL(&result->data[i][j], result->tmp_buffer[j], result->lengths[j]- 1,
1);
+ }
break;
}
}
--
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