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Fixes crash when resource file is corrupted

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This commit is contained in:
Haoyu Qiu
2020-02-11 11:39:20 +08:00
parent 0b4b24883d
commit 832a5c860b
2 changed files with 33 additions and 16 deletions
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8
core/io/file_access_compressed.cpp
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@ -63,6 +63,10 @@ Error FileAccessCompressed::open_after_magic(FileAccess *p_base) {
f = p_base;
cmode = (Compression::Mode)f->get_32();
block_size = f->get_32();
if (block_size == 0) {
f = NULL; // Let the caller to handle the FileAccess object if failed to open as compressed file.
ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Can't open compressed file '" + p_base->get_path() + "' with block size 0, it is corrupted.");
}
read_total = f->get_32();
int bc = (read_total / block_size) + 1;
int acc_ofs = f->get_position() + bc * 4;
@ -125,13 +129,11 @@ Error FileAccessCompressed::_open(const String &p_path, int p_mode_flags) {
char rmagic[5];
f->get_buffer((uint8_t *)rmagic, 4);
rmagic[4] = 0;
if (magic != rmagic) {
if (magic != rmagic || open_after_magic(f) != OK) {
memdelete(f);
f = NULL;
return ERR_FILE_UNRECOGNIZED;
}
open_after_magic(f);
}
return OK;