diff options
Diffstat (limited to 'libio/wstrops.c')
| -rw-r--r-- | libio/wstrops.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/libio/wstrops.c b/libio/wstrops.c index 43d847d034..3993579bd1 100644 --- a/libio/wstrops.c +++ b/libio/wstrops.c @@ -95,8 +95,11 @@ _IO_wstr_overflow (fp, c) wchar_t *old_buf = fp->_wide_data->_IO_buf_base; size_t old_wblen = _IO_wblen (fp); _IO_size_t new_size = 2 * old_wblen + 100; - if (new_size < old_wblen) + + if (__glibc_unlikely (new_size < old_wblen) + || __glibc_unlikely (new_size > SIZE_MAX / sizeof (wchar_t))) return EOF; + new_buf = (wchar_t *) (*((_IO_strfile *) fp)->_s._allocate_buffer) (new_size * sizeof (wchar_t)); @@ -186,6 +189,9 @@ enlarge_userbuf (_IO_FILE *fp, _IO_off64_t offset, int reading) return 1; _IO_size_t newsize = offset + 100; + if (__glibc_unlikely (newsize > SIZE_MAX / sizeof (wchar_t))) + return 1; + wchar_t *oldbuf = wd->_IO_buf_base; wchar_t *newbuf = (wchar_t *) (*((_IO_strfile *) fp)->_s._allocate_buffer) (newsize |