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-rw-r--r--memory_limit.c98
1 files changed, 98 insertions, 0 deletions
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1/*
2 +----------------------------------------------------------------------+
3 | Suhosin Version 1 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 2006-2007 The Hardened-PHP Project |
6 | Copyright (c) 2007-2015 SektionEins GmbH |
7 +----------------------------------------------------------------------+
8 | This source file is subject to version 3.01 of the PHP license, |
9 | that is bundled with this package in the file LICENSE, and is |
10 | available through the world-wide-web at the following url: |
11 | http://www.php.net/license/3_01.txt |
12 | If you did not receive a copy of the PHP license and are unable to |
13 | obtain it through the world-wide-web, please send a note to |
14 | license@php.net so we can mail you a copy immediately. |
15 +----------------------------------------------------------------------+
16 | Author: Stefan Esser <sesser@sektioneins.de> |
17 +----------------------------------------------------------------------+
18*/
19/*
20 $Id: memory_limit.c $
21*/
22
23#ifdef HAVE_CONFIG_H
24#include "config.h"
25#endif
26
27#include "php.h"
28#include "php_ini.h"
29#include "ext/standard/info.h"
30#include "php_suhosin7.h"
31
32
33/* {{{ PHP_INI_MH
34 */
35static PHP_INI_MH(suhosin_OnChangeMemoryLimit)
36{
37#if SIZEOF_LONG==8
38 long hard_memory_limit = 0x7fffffffffffffff;
39#elif SIZEOF_LONG==4
40 long hard_memory_limit = 0x7fffffff;
41#endif /* will produce a compile error or SIZEOF_LONG is not 4 or 8 */
42 if (stage == ZEND_INI_STAGE_RUNTIME) {
43 if (SUHOSIN7_G(memory_limit) > 0) {
44 SUHOSIN7_G(hard_memory_limit) = SUHOSIN7_G(memory_limit);
45 } else if (SUHOSIN7_G(hard_memory_limit) == 0) {
46 SUHOSIN7_G(hard_memory_limit) = PG(memory_limit);
47 }
48 hard_memory_limit = SUHOSIN7_G(hard_memory_limit);
49 } else {
50 SUHOSIN7_G(hard_memory_limit) = 0;
51 }
52 if (new_value) {
53 PG(memory_limit) = zend_atol(ZSTR_VAL(new_value), ZSTR_LEN(new_value));
54 if (hard_memory_limit > 0) {
55 if (PG(memory_limit) > hard_memory_limit) {
56 suhosin_log(S_MISC, "script tried to increase memory_limit to " ZEND_LONG_FMT " bytes which is above the allowed value", PG(memory_limit));
57 if (!SUHOSIN7_G(simulation)) {
58 PG(memory_limit) = hard_memory_limit;
59 return FAILURE;
60 }
61 } else if (PG(memory_limit) < 0) {
62 suhosin_log(S_MISC, "script tried to disable memory_limit by setting it to a negative value " ZEND_LONG_FMT " bytes which is not allowed", PG(memory_limit));
63 if (!SUHOSIN7_G(simulation)) {
64 PG(memory_limit) = hard_memory_limit;
65 return FAILURE;
66 }
67 }
68 }
69 } else {
70 PG(memory_limit) = hard_memory_limit;
71 }
72 return zend_set_memory_limit(PG(memory_limit));
73}
74/* }}} */
75
76
77void suhosin_hook_memory_limit()
78{
79 zend_ini_entry *ini_entry;
80
81 /* check if we are compiled against memory_limit */
82 if ((ini_entry=zend_hash_str_find_ptr(EG(ini_directives), "memory_limit", sizeof("memory_limit")-1))) {
83 /* replace OnUpdateMemoryLimit handler */
84 ini_entry->on_modify = suhosin_OnChangeMemoryLimit;
85 }
86
87}
88
89
90/*
91 * Local variables:
92 * tab-width: 4
93 * c-basic-offset: 4
94 * End:
95 * vim600: noet sw=4 ts=4 fdm=marker
96 * vim<600: noet sw=4 ts=4
97 */
98