Check that dest is valid for decompression (#3555)

* add check for valid dest buffer and fuzz on random dest ptr when malloc 0

* add uptrval to linux-kernel

* remove bin files

* get rid of uptrval

* restrict max pointer value check to platforms where sizeof(size_t) == sizeof(void*)

lib/decompress/zstd_decompress_block.c

@@ -2112,7 +2112,9 @@ ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
         ip += seqHSize;
         srcSize -= seqHSize;
 
-        RETURN_ERROR_IF(dst == NULL && nbSeq > 0, dstSize_tooSmall, "NULL not handled");
+        RETURN_ERROR_IF((dst == NULL || dstCapacity == 0) && nbSeq > 0, dstSize_tooSmall, "NULL not handled");
+        RETURN_ERROR_IF(MEM_64bits() && sizeof(size_t) == sizeof(void*) && (size_t)(-1) - (size_t)dst < (size_t)(1 << 20), dstSize_tooSmall,
+                "invalid dst");
 
         /* If we could potentially have long offsets, or we might want to use the prefetch decoder,
          * compute information about the share of long offsets, and the maximum nbAdditionalBits.