From 01d5c463be103a29662d2123cd37ae2f21b077a6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= Date: Mon, 7 Jun 2021 18:31:50 +0200 Subject: FileAccess: Don't err in `store_buffer` with buffer of size 0 The error check was added for `FileAccessUnix` but it's not an error when both `p_src` and `p_length` are zero. Added correct error checks to all implementations to prevent the actual erroneous case: `p_src` is nullptr but `p_length > 0` (risk of null pointer indexing). Fixes #33564. --- drivers/windows/file_access_windows.cpp | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/windows') diff --git a/drivers/windows/file_access_windows.cpp b/drivers/windows/file_access_windows.cpp index 1f46b44f5e..d6deda7b5d 100644 --- a/drivers/windows/file_access_windows.cpp +++ b/drivers/windows/file_access_windows.cpp @@ -294,6 +294,7 @@ void FileAccessWindows::store_8(uint8_t p_dest) { void FileAccessWindows::store_buffer(const uint8_t *p_src, uint64_t p_length) { ERR_FAIL_COND(!f); + ERR_FAIL_COND(!p_src && p_length > 0); if (flags == READ_WRITE || flags == WRITE_READ) { if (prev_op == READ) { if (last_error != ERR_FILE_EOF) { -- cgit v1.2.3