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Simpler overflow check

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This commit is contained in:
Dmitry Stogov 2016-12-01 10:30:02 +03:00
parent d5a2af6d1c
commit 003346c450
1 changed files with 3 additions and 5 deletions
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8
ext/opcache/zend_accelerator_module.c
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@ -107,8 +107,6 @@ static ZEND_INI_MH(OnUpdateMemoryConsumption)
#else #else
char *base = (char *) ts_resource(*((int *) mh_arg2)); char *base = (char *) ts_resource(*((int *) mh_arg2));
#endif #endif
zend_long megabyte, overflow;
double dummy;
/* keep the compiler happy */ /* keep the compiler happy */
(void)entry; (void)mh_arg2; (void)mh_arg3; (void)stage; (void)entry; (void)mh_arg2; (void)mh_arg3; (void)stage;
@ -132,10 +130,10 @@ static ZEND_INI_MH(OnUpdateMemoryConsumption)
ini_entry->value = zend_string_init(new_new_value, 1, 1); ini_entry->value = zend_string_init(new_new_value, 1, 1);
} }
megabyte = 1024 * 1024; if (UNEXPECTED(memsize > ZEND_ULONG_MAX / (1024 * 1024))) {
ZEND_SIGNED_MULTIPLY_LONG(memsize, megabyte, *p, dummy, overflow);
if (UNEXPECTED(overflow)) {
*p = ZEND_ULONG_MAX; *p = ZEND_ULONG_MAX;
} else {
*p = memsize * (1024 * 1024);
} }
return SUCCESS; return SUCCESS;
} }