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| author | Stanislav Malyshev <stas@php.net> | 2016-09-28 23:30:48 -0700 |
|---|---|---|
| committer | Anatol Belski <ab@php.net> | 2016-10-13 00:51:13 +0200 |
| commit | 87202a52f4b224bc98124eecc1b68ed865c48698 (patch) | |
| tree | 7fcd0d4a6411230ea4f8901e06d1bf19722ed6f9 | |
| parent | 4094e54c26715df1ed8d7ad9a9b8b1347042c34a (diff) | |
| download | php-git-87202a52f4b224bc98124eecc1b68ed865c48698.tar.gz | |
Fix bug #73189 - Memcpy negative size parameter php_resolve_path
(cherry picked from commit da7e89cde880c66887caacd0a3eae7ecdacf9b2a)
(cherry picked from commit c4c2cce37dd99bbcf1411ad8d6884c3c927d7bc9)
| -rw-r--r-- | main/fopen_wrappers.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/main/fopen_wrappers.c b/main/fopen_wrappers.c index bf78db3bdf..b554c38039 100644 --- a/main/fopen_wrappers.c +++ b/main/fopen_wrappers.c @@ -536,7 +536,7 @@ PHPAPI zend_string *php_resolve_path(const char *filename, int filename_length, } end = strchr(p, DEFAULT_DIR_SEPARATOR); if (end) { - if ((end-ptr) + 1 + filename_length + 1 >= MAXPATHLEN) { + if (filename_length > (MAXPATHLEN - 2) || (end-ptr) > MAXPATHLEN || (end-ptr) + 1 + (size_t)filename_length + 1 >= MAXPATHLEN) { ptr = end + 1; continue; } @@ -545,9 +545,9 @@ PHPAPI zend_string *php_resolve_path(const char *filename, int filename_length, memcpy(trypath+(end-ptr)+1, filename, filename_length+1); ptr = end+1; } else { - int len = (int)strlen(ptr); + size_t len = strlen(ptr); - if (len + 1 + filename_length + 1 >= MAXPATHLEN) { + if (filename_length > (MAXPATHLEN - 2) || len > MAXPATHLEN || len + 1 + (size_t)filename_length + 1 >= MAXPATHLEN) { break; } memcpy(trypath, ptr, len); @@ -585,6 +585,7 @@ PHPAPI zend_string *php_resolve_path(const char *filename, int filename_length, while ((--exec_fname_length < SIZE_MAX) && !IS_SLASH(exec_fname[exec_fname_length])); if (exec_fname_length > 0 && + filename_length < (MAXPATHLEN - 2) && exec_fname_length + 1 + filename_length + 1 < MAXPATHLEN) { memcpy(trypath, exec_fname, exec_fname_length + 1); memcpy(trypath+exec_fname_length + 1, filename, filename_length+1); |