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Fixed bug #50982 (incorrect assumption of PAGE_SIZE size)

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This commit is contained in:
Dmitry Stogov 2011-09-15 11:30:17 +00:00
parent facdc8a7aa
commit 653e374b6b
1 changed files with 21 additions and 5 deletions
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26
Zend/zend_stream.c
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@ -27,10 +27,24 @@
#include <sys/types.h>
#include <sys/stat.h>
#if HAVE_SYS_MMAN_H
# include <sys/mman.h>
# ifndef PAGE_SIZE
# define PAGE_SIZE 4096
#if HAVE_MMAP
# if HAVE_UNISTD_H
# include <unistd.h>
# if defined(_SC_PAGESIZE)
# define REAL_PAGE_SIZE sysconf(_SC_PAGESIZE);
# elif defined(_SC_PAGE_SIZE)
# define REAL_PAGE_SIZE sysconf(_SC_PAGE_SIZE);
# endif
# endif
# if HAVE_SYS_MMAN_H
# include <sys/mman.h>
# endif
# ifndef REAL_PAGE_SIZE
# ifdef PAGE_SIZE
# define REAL_PAGE_SIZE PAGE_SIZE
# else
# define REAL_PAGE_SIZE 4096
# endif
# endif
#endif
@ -215,9 +229,11 @@ ZEND_API int zend_stream_fixup(zend_file_handle *file_handle, char **buf, size_t
if (old_type == ZEND_HANDLE_FP && !file_handle->handle.stream.isatty && size) {
#if HAVE_MMAP
size_t page_size = REAL_PAGE_SIZE;
if (file_handle->handle.fp &&
size != 0 &&
((size - 1) % PAGE_SIZE) <= PAGE_SIZE - ZEND_MMAP_AHEAD) {
((size - 1) % page_size) <= page_size - ZEND_MMAP_AHEAD) {
/* *buf[size] is zeroed automatically by the kernel */
*buf = mmap(0, size + ZEND_MMAP_AHEAD, PROT_READ, MAP_PRIVATE, fileno(file_handle->handle.fp), 0);
if (*buf != MAP_FAILED) {