fix out-of-bounds read in zip_dir_add for empty name#529
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Another good catch, thanks. |
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zip_dir_add() reads name[len - 1] to test for a trailing slash, but len is strlen(name) and is never checked for zero. Passing an empty name makes this name[(size_t)-1], a one-byte out-of-bounds read before the buffer. Guard the access with len == 0 so empty names take the trailing-slash path instead.