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FileAccess: Don't err in store_buffer with buffer of size 0

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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.
This commit is contained in:
Rémi Verschelde
2021-06-07 18:31:50 +02:00
parent 6f8d5cff66
commit 01d5c463be
5 changed files with 5 additions and 1 deletions
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1
core/io/file_access_encrypted.cpp
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@@ -257,6 +257,7 @@ Error FileAccessEncrypted::get_error() const {
void FileAccessEncrypted::store_buffer(const uint8_t *p_src, uint64_t p_length) {
ERR_FAIL_COND_MSG(!writing, "File has not been opened in write mode.");
ERR_FAIL_COND(!p_src && p_length > 0);
if (pos < get_length()) {
for (uint64_t i = 0; i < p_length; i++) {