From: Jia Tan <jiat0218@gmail.com>
Date: Wed, 17 Aug 2022 12:20:16 +0000 (+0800)
Subject: liblzma: Add NULL check to lzma_index_hash_append.
X-Git-Tag: v5.4.1~27
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2ac7bafc8f07c1edefe96a4a7a040ddfff0eb5bb;p=thirdparty%2Fxz.git

liblzma: Add NULL check to lzma_index_hash_append.

This is for consistency with lzma_index_append.
---

diff --git a/src/liblzma/common/index_hash.c b/src/liblzma/common/index_hash.c
index c3c56674..f55f7bc8 100644
--- a/src/liblzma/common/index_hash.c
+++ b/src/liblzma/common/index_hash.c
@@ -145,7 +145,7 @@ lzma_index_hash_append(lzma_index_hash *index_hash, lzma_vli unpadded_size,
 		lzma_vli uncompressed_size)
 {
 	// Validate the arguments.
-	if (index_hash->sequence != SEQ_BLOCK
+	if (index_hash == NULL || index_hash->sequence != SEQ_BLOCK
 			|| unpadded_size < UNPADDED_SIZE_MIN
 			|| unpadded_size > UNPADDED_SIZE_MAX
 			|| uncompressed_size > LZMA_VLI_MAX)