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Patch max_input_vars.patch for *General Issues Bug #60655Patch version 2012-01-05 04:08 UTC Return to Bug #60655 | Download this patchThis patch is obsolete Obsoleted by patches:
Developer: laruence@php.netLine 34 (now 34), was 70 lines, now 8 lines -Warning: unserialize() expects exactly 1 parameter, 2 given in %s on line 21 +Notice: unserialize(): Error at offset 0 of 1 bytes in %sserialization_error_001.php on line %d bool(false) Done Index: trunk/ext/standard/tests/serialize/unserialize_max_vars.phpt =================================================================== --- trunk/ext/standard/tests/serialize/unserialize_max_vars.phpt (revision 0) +++ trunk/ext/standard/tests/serialize/unserialize_max_vars.phpt (revision 0) @@ -0,0 +1,57 @@ +--TEST-- +Test unserialize() functions with max_input_vars +--FILE-- +<?php +$str = serialize(array(1,2,3)); // there will be 4 items, array, and 1, 2, 3 + +print_r(unserialize($str, 3)); +print_r(unserialize($str, 4)); + +$str = serialize(array(array(),array(2,3))); // there will be 5 items, array, and array, array, 2, 3 +print_r(unserialize($str, 3)); +print_r(unserialize($str, 5)); + +$obj = (object)(array(array(),array(2,3))); +$str = serialize($obj); + +print_r(unserialize($str, 3)); +print_r(unserialize($str, 5)); +?> +--EXPECTF-- +Warning: unserialize(): Unserialized variables exceeded 3 in %sunserialize_max_vars.php on line %d +Array +( + [0] => 1 + [1] => 2 + [2] => 3 +) + +Warning: unserialize(): Unserialized variables exceeded 3 in %sunserialize_max_vars.php on line %d +Array +( + [0] => Array + ( + ) + + [1] => Array + ( + [0] => 2 + [1] => 3 + ) + +) + +Warning: unserialize(): Unserialized variables exceeded 3 in %sunserialize_max_vars.php on line %d +stdClass Object +( + [0] => Array + ( + ) + + [1] => Array + ( + [0] => 2 + [1] => 3 + ) + +) Index: trunk/ext/standard/var_unserializer.c =================================================================== --- trunk/ext/standard/var_unserializer.c (revision 321767) +++ trunk/ext/standard/var_unserializer.c (working copy) FREE_ZVAL(key); return 0; } + --(BG(unserialize).num_vars); if (Z_TYPE_P(key) != IS_LONG && Z_TYPE_P(key) != IS_STRING) { zval_dtor(key); @@ -297,12 +298,14 @@ switch (Z_TYPE_P(key)) { + } if (var_hash && cursor[0] != 'R') { var_push(var_hash, rval); } } start = cursor; - - if (yych != '"') goto yy18; ++YYCURSOR; -#line 616 "ext/standard/var_unserializer.re" +#line 632 "ext/standard/var_unserializer.re" { INIT_PZVAL(*rval); + ++(BG(unserialize).num_vars); { INIT_PZVAL(*rval); + ++(BG(unserialize).num_vars); return object_common2(UNSERIALIZE_PASSTHRU, object_common1(UNSERIALIZE_PASSTHRU, ZEND_STANDARD_CLASS_DEF_PTR)); } -#line 716 "ext/standard/var_unserializer.c" Line 469 (now 407), was 16 lines, now 15 lines Index: trunk/ext/standard/php_var.h =================================================================== --- trunk/ext/standard/php_var.h (revision 321767) +++ trunk/ext/standard/php_var.h (working copy) @@ -95,9 +95,13 @@ @@ -95,9 +95,12 @@ } else { \ (var_hash_ptr) = (php_serialize_data_t)BG(unserialize).var_hash; \ ++BG(unserialize).level; \ - } \ + } \ + BG(unserialize).num_vars = 0; \ + BG(unserialize).max_vars = 0; \ } while (0) +#define PHP_VAR_UNSERIALIZE_MAX_VARS(max_vars) BG(unserialize).max_vars = max_vars; + return 1; } @@ -533,6 +545,7 @@ *p = YYCURSOR; INIT_PZVAL(*rval); ZVAL_DOUBLE(*rval, zend_strtod((const char *)start + 2, NULL)); + ++(BG(unserialize).num_vars); return 1; } @@ -561,6 +574,7 @@ INIT_PZVAL(*rval); ZVAL_STRINGL(*rval, str, len, 1); + ++(BG(unserialize).num_vars); return 1; } @@ -590,6 +604,7 @@ *p = YYCURSOR; INIT_PZVAL(*rval); ZVAL_DOUBLE(*rval, zend_strtod((const char *)start + 2, NULL)); + ++(BG(unserialize).num_vars); return 1; } @@ -561,6 +574,7 @@ INIT_PZVAL(*rval); ZVAL_STRINGL(*rval, str, len, 1); + ++(BG(unserialize).num_vars); return 1; } @@ -590,6 +604,7 @@ INIT_PZVAL(*rval); ZVAL_STRINGL(*rval, str, len, 0); + ++(BG(unserialize).num_vars); { int utf16_len; zval *z; @@ -627,7 +628,7 @@ } } ALLOC_INIT_ZVAL(z); - jp = new_JSON_parser(depth); + jp = new_JSON_parser(depth, max_vars); if (parse_JSON_ex(jp, z, utf16, utf16_len, options TSRMLS_CC)) { Line 706 (now 643), was 69 lines, now 24 lines -$x = json_decode($json, false, 512, JSON_BIGINT_AS_STRING); +$x = json_decode($json, false, 512, 1000, JSON_BIGINT_AS_STRING); var_dump($x->largenum); echo "Done\n"; ?> Index: trunk/ext/json/tests/max_input_vars.phpt =================================================================== --- trunk/ext/json/tests/max_input_vars.phpt (revision 0) +++ trunk/ext/json/tests/max_input_vars.phpt (revision 0) @@ -0,0 +1,40 @@ +--TEST-- +json_decode() with max_input_vars +--SKIPIF-- +<?php if (!extension_loaded("json")) print "skip"; ?> +--FILE-- +<?php + +$a = array(1,2,3,4); //an array, and 1,2,3,4 total 5 elements +$str = json_encode($a); + +print_r(json_decode($str, false, 512, 4)); +var_dump(json_last_error() == JSON_ERROR_MAX_VARS); +print_r(json_decode($str, false, 512, 5)); + +$a = array(1,array(1),3); //an array, 1, an array, 1, 3 total 5 elements +$str = json_encode($a); +print_r(json_decode($str, true, 512, 4)); +var_dump(json_last_error() == JSON_ERROR_MAX_VARS); +print_r(json_decode($str, true, 512, 5)); +?> +--EXPECT-- +bool(true) +Array +( + [0] => 1 + [1] => 2 + [2] => 3 + [3] => 4 +) +bool(true) +Array +( + [0] => 1 + [1] => Array + ( + [0] => 1 + ) + + [2] => 3 +) ?> Index: trunk/ext/json/tests/json_decode_error.phpt =================================================================== --- trunk/ext/json/tests/json_decode_error.phpt (revision 321767) +++ trunk/ext/json/tests/json_decode_error.phpt (working copy) @@ -20,7 +20,7 @@ echo "\n-- Testing json_decode() function with more than expected no. of arguments --\n"; $extra_arg = 10; -var_dump( json_decode('"abc"', TRUE, 512, 0, $extra_arg) ); +var_dump( json_decode('"abc"', TRUE, 512, 0, 1000, $extra_arg) ); ?> ===Done=== @@ -34,6 +34,6 @@ -- Testing json_decode() function with more than expected no. of arguments -- -Warning: json_decode() expects at most 4 parameters, 5 given in %s on line %d +Warning: json_decode() expects at most 5 parameters, 6 given in %s on line %d int next_state; /* the next state */ int the_index; int assoc = options & PHP_JSON_OBJECT_AS_ARRAY; + long num_vars = 1; /* the container is also counted in */ smart_str buf = {0}; smart_str key = {0}; @@ -453,6 +455,11 @@ JSON_RESET_TYPE(); static inline void php_json_decode(zval *return_value, char *str, int str_len, zend_bool assoc, long depth TSRMLS_DC) { - php_json_decode_ex(return_value, str, str_len, assoc ? PHP_JSON_OBJECT_AS_ARRAY : 0, depth TSRMLS_CC); + php_json_decode_ex(return_value, str, str_len, assoc ? PHP_JSON_OBJECT_AS_ARRAY : 0, depth, 0 TSRMLS_CC); } } Index: trunk/ext/json/JSON_parser.h =================================================================== --- trunk/ext/json/JSON_parser.h (revision 321767) + long max_vars; zval **the_zstack; zval *the_static_zstack[JSON_PARSER_DEFAULT_DEPTH]; } * JSON_parser; enum error_codes { PHP_JSON_ERROR_NONE = 0, - PHP_JSON_ERROR_DEPTH, + PHP_JSON_ERROR_DEPTH, continue; } Index: trunk/main/php_variables.c =================================================================== =================================================================== --- trunk/main/php_variables.c (revision 321767) +++ trunk/main/php_variables.c (working copy) @@ -178,15 +178,10 @@ } else { - } - MAKE_STD_ZVAL(gpc_element); - array_init(gpc_element); - zend_symtable_update(symtable1, escaped_index, index_len + 1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p); - } - } + || Z_TYPE_PP(gpc_element_p) != IS_ARRAY) { + MAKE_STD_ZVAL(gpc_element); + array_init(gpc_element); + zend_symtable_update(symtable1, escaped_index, index_len + 1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p); Line 992 (now 884), was 226 lines, now 23 lines { char *var, *val, *e, *s, *p; zval *array_ptr = (zval *) arg; + long num_vars = 0; if (SG(request_info).post_data == NULL) { return; @@ -270,6 +259,11 @@ } efree(val); } } + ++num_vars; + if (PG(max_input_vars) && num_vars >= PG(max_input_vars)) { + php_error_docref(NULL TSRMLS_CC, E_WARNING, "Post variables exceeded %ld. To increase the limit change max_input_vars in php.ini.", PG(max_input_vars)); + return; + } + } s = p + 1; } } if (s < e) { Index: branches/PHP_5_3/ext/standard/basic_functions.h =================================================================== --- branches/PHP_5_3/ext/standard/basic_functions.h (revision 321767) +++ branches/PHP_5_3/ext/standard/basic_functions.h (working copy) @@ -208,6 +208,10 @@ /* var.c */ zend_class_entry *incomplete_class; + struct { + long max_vars; + long num_vars; + } unserialize; /* url_scanner_ex.re */ url_adapt_state_ex_t url_adapt_state_ex; Index: branches/PHP_5_3/ext/standard/var.c =================================================================== --- branches/PHP_5_3/ext/standard/var.c (revision 321767) +++ branches/PHP_5_3/ext/standard/var.c (working copy) @@ -923,8 +923,9 @@ int buf_len; const unsigned char *p; php_unserialize_data_t var_hash; + long max_vars = PG(max_input_vars); - if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &buf, &buf_len) == FAILURE) { + if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &buf, &buf_len, &max_vars) == FAILURE) { RETURN_FALSE; } @@ -934,10 +935,13 @@ p = (const unsigned char*) buf; PHP_VAR_UNSERIALIZE_INIT(var_hash); + PHP_VAR_UNSERIALIZE_MAX_VARS(max_vars); if (!php_var_unserialize(&return_value, &p, p + buf_len, &var_hash TSRMLS_CC)) { PHP_VAR_UNSERIALIZE_DESTROY(var_hash); zval_dtor(return_value); - php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Error at offset %ld of %d bytes", (long)((char*)p - buf), buf_len); + if (!BG(unserialize).max_vars || BG(unserialize).num_vars < BG(unserialize).max_vars) { + php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Error at offset %ld of %d bytes", (long)((char*)p - buf), buf_len); + } RETURN_FALSE; } PHP_VAR_UNSERIALIZE_DESTROY(var_hash); Index: branches/PHP_5_3/ext/standard/php_var.h =================================================================== --- branches/PHP_5_3/ext/standard/php_var.h (revision 321767) +++ branches/PHP_5_3/ext/standard/php_var.h (working copy) @@ -21,6 +21,7 @@ #ifndef PHP_VAR_H #define PHP_VAR_H +#include "ext/standard/basic_functions.h" #include "ext/standard/php_smart_str_public.h" PHP_FUNCTION(var_dump); @@ -57,10 +58,15 @@ #define PHP_VAR_UNSERIALIZE_INIT(var_hash) \ (var_hash).first = 0; \ - (var_hash).first_dtor = 0 + (var_hash).first_dtor = 0; \ + BG(unserialize).num_vars = 0; \ + BG(unserialize).max_vars = 0 + #define PHP_VAR_UNSERIALIZE_DESTROY(var_hash) \ var_destroy(&(var_hash)) +#define PHP_VAR_UNSERIALIZE_MAX_VARS(max_vars) BG(unserialize).max_vars = max_vars + PHPAPI void var_replace(php_unserialize_data_t *var_hash, zval *ozval, zval **nzval); PHPAPI void var_push_dtor(php_unserialize_data_t *var_hash, zval **val); PHPAPI void var_destroy(php_unserialize_data_t *var_hash); Index: branches/PHP_5_3/ext/standard/var_unserializer.re =================================================================== --- branches/PHP_5_3/ext/standard/var_unserializer.re (revision 321767) +++ branches/PHP_5_3/ext/standard/var_unserializer.re (working copy) @@ -269,6 +269,7 @@ FREE_ZVAL(key); return 0; } + --(BG(unserialize).num_vars); if (Z_TYPE_P(key) != IS_LONG && Z_TYPE_P(key) != IS_STRING) { zval_dtor(key); @@ -398,6 +399,11 @@ limit = cursor = *p; + if (BG(unserialize).max_vars && BG(unserialize).num_vars >= BG(unserialize).max_vars) { + php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unserialized variables exceeded %ld", BG(unserialize).max_vars); + return 0; + } + if (var_hash && cursor[0] != 'R') { var_push(var_hash, rval); } @@ -425,7 +431,7 @@ *rval = *rval_ref; Z_ADDREF_PP(rval); Z_SET_ISREF_PP(rval); - + ++(BG(unserialize).num_vars); return 1; } @@ -449,6 +455,7 @@ Z_ADDREF_PP(rval); Z_UNSET_ISREF_PP(rval); + ++(BG(unserialize).num_vars); return 1; } @@ -456,6 +463,7 @@ *p = YYCURSOR; INIT_PZVAL(*rval); ZVAL_NULL(*rval); + ++(BG(unserialize).num_vars); return 1; } @@ -463,6 +471,7 @@ *p = YYCURSOR; INIT_PZVAL(*rval); ZVAL_BOOL(*rval, parse_iv(start + 2)); + ++(BG(unserialize).num_vars); return 1; } @@ -490,6 +499,7 @@ *p = YYCURSOR; INIT_PZVAL(*rval); ZVAL_LONG(*rval, parse_iv(start + 2)); + ++(BG(unserialize).num_vars); return 1; } @@ -505,6 +515,7 @@ ZVAL_DOUBLE(*rval, -php_get_inf()); } + ++(BG(unserialize).num_vars); return 1; } @@ -515,6 +526,7 @@ *p = YYCURSOR; INIT_PZVAL(*rval); ZVAL_DOUBLE(*rval, zend_strtod((const char *)start + 2, NULL)); + ++(BG(unserialize).num_vars); return 1; } @@ -543,6 +555,7 @@ INIT_PZVAL(*rval); ZVAL_STRINGL(*rval, str, len, 1); + ++(BG(unserialize).num_vars); return 1; } @@ -572,6 +585,7 @@ INIT_PZVAL(*rval); ZVAL_STRINGL(*rval, str, len, 0); + ++(BG(unserialize).num_vars); return 1; } @@ -588,6 +602,7 @@ array_init_size(*rval, elements); + ++(BG(unserialize).num_vars); if (!process_nested_data(UNSERIALIZE_PASSTHRU, Z_ARRVAL_PP(rval), elements, 0)) { return 0; } @@ -599,6 +614,7 @@ INIT_PZVAL(*rval); + ++(BG(unserialize).num_vars); return object_common2(UNSERIALIZE_PASSTHRU, object_common1(UNSERIALIZE_PASSTHRU, ZEND_STANDARD_CLASS_DEF_PTR)); } @@ -701,6 +717,7 @@ *p = YYCURSOR; if (custom_object) { + ++(BG(unserialize).num_vars); int ret = object_custom(UNSERIALIZE_PASSTHRU, ce); if (ret && incomplete_class) { @@ -717,6 +734,7 @@ } efree(class_name); + ++(BG(unserialize).num_vars); return object_common2(UNSERIALIZE_PASSTHRU, elements); } Index: branches/PHP_5_3/main/rfc1867.c =================================================================== --- branches/PHP_5_3/main/rfc1867.c (revision 321767) +++ branches/PHP_5_3/main/rfc1867.c (working copy) Line 1343 (now 1032), was 70 lines, now 8 lines -Warning: unserialize() expects exactly 1 parameter, 2 given in %s on line 21 +Notice: unserialize(): Error at offset 0 of 1 bytes in %sserialization_error_001.php on line %d bool(false) Done Index: branches/PHP_5_4/ext/standard/tests/serialize/unserialize_max_vars.phpt =================================================================== --- branches/PHP_5_4/ext/standard/tests/serialize/unserialize_max_vars.phpt (revision 0) +++ branches/PHP_5_4/ext/standard/tests/serialize/unserialize_max_vars.phpt (revision 0) @@ -0,0 +1,57 @@ +--TEST-- +Test unserialize() functions with max_input_vars +--FILE-- +<?php +$str = serialize(array(1,2,3)); // there will be 4 items, array, and 1, 2, 3 + +print_r(unserialize($str, 3)); +print_r(unserialize($str, 4)); + +$str = serialize(array(array(),array(2,3))); // there will be 5 items, array, and array, array, 2, 3 +print_r(unserialize($str, 3)); +print_r(unserialize($str, 5)); + +$obj = (object)(array(array(),array(2,3))); +$str = serialize($obj); + +print_r(unserialize($str, 3)); +print_r(unserialize($str, 5)); +?> +--EXPECTF-- +Warning: unserialize(): Unserialized variables exceeded 3 in %sunserialize_max_vars.php on line %d +Array +( + [0] => 1 + [1] => 2 + [2] => 3 +) + +Warning: unserialize(): Unserialized variables exceeded 3 in %sunserialize_max_vars.php on line %d +Array +( + [0] => Array + ( + ) + + [1] => Array + ( + [0] => 2 + [1] => 3 + ) + +) + +Warning: unserialize(): Unserialized variables exceeded 3 in %sunserialize_max_vars.php on line %d +stdClass Object +( + [0] => Array + ( + ) + + [1] => Array + ( + [0] => 2 + [1] => 3 + ) + +) Index: branches/PHP_5_4/ext/standard/var_unserializer.c =================================================================== --- branches/PHP_5_4/ext/standard/var_unserializer.c (revision 321767) +++ branches/PHP_5_4/ext/standard/var_unserializer.c (working copy) Line 1778 (now 1405), was 16 lines, now 15 lines Index: branches/PHP_5_4/ext/standard/php_var.h =================================================================== --- branches/PHP_5_4/ext/standard/php_var.h (revision 321767) +++ branches/PHP_5_4/ext/standard/php_var.h (working copy) @@ -95,9 +95,13 @@ @@ -95,9 +95,12 @@ } else { \ (var_hash_ptr) = (php_serialize_data_t)BG(unserialize).var_hash; \ ++BG(unserialize).level; \ - } \ + } \ + BG(unserialize).num_vars = 0; \ + BG(unserialize).max_vars = 0; \ } while (0) +#define PHP_VAR_UNSERIALIZE_MAX_VARS(max_vars) BG(unserialize).max_vars = max_vars; + |
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