* uncompressible. Thus, we must look for worst-case expansion when the
* compressor is encoding uncompressible data.
*
- * The structure of the .zst file in case of a compresed kernel is as follows.
+ * The structure of the .zst file in case of a compressed kernel is as follows.
* Maximum sizes (as bytes) of the fields are in parenthesis.
*
* Frame Header: (18)
/*
* Preboot environments #include "path/to/decompress_unzstd.c".
* All of the source files we depend on must be #included.
- * zstd's only source dependeny is xxhash, which has no source
+ * zstd's only source dependency is xxhash, which has no source
* dependencies.
*
* When UNZSTD_PREBOOT is defined we declare __decompress(), which is
int err;
size_t ret;
+ /*
+ * ZSTD decompression code won't be happy if the buffer size is so big
+ * that its end address overflows. When the size is not provided, make
+ * it as big as possible without having the end address overflow.
+ */
if (out_len == 0)
- out_len = LONG_MAX; /* no limit */
+ out_len = UINTPTR_MAX - (uintptr_t)out_buf;
if (fill == NULL && flush == NULL)
/*