From: Aleksei Vetrov Date: Thu, 23 Nov 2023 15:31:47 +0000 (+0000) Subject: libelf: check decompressed ZSTD size X-Git-Tag: elfutils-0.191~32 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=03c171947cc538b04957ac2222ce86e7c0170bd1;p=thirdparty%2Felfutils.git libelf: check decompressed ZSTD size Decompression functions like __libelf_decompress_zlib check that decompressed data has the same size as it was declared in the header (size_out argument). The same check is now added to __libelf_decompress_zstd to make sure that the whole allocated buffer is initialized. * libelf/elf_compress.c (__libelf_decompress_zstd): Use return value of ZSTD_decompress to check that decompressed data size is the same as size_out of the buffer that was allocated. Signed-off-by: Aleksei Vetrov --- diff --git a/libelf/elf_compress.c b/libelf/elf_compress.c index c7283c6a6..0ad6a32a7 100644 --- a/libelf/elf_compress.c +++ b/libelf/elf_compress.c @@ -422,7 +422,7 @@ __libelf_decompress_zstd (void *buf_in, size_t size_in, size_t size_out) } size_t ret = ZSTD_decompress (buf_out, size_out, buf_in, size_in); - if (ZSTD_isError (ret)) + if (unlikely (ZSTD_isError (ret)) || unlikely (ret != size_out)) { free (buf_out); __libelf_seterrno (ELF_E_DECOMPRESS_ERROR);