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-rw-r--r--src/liblzma/common/index_hash.c2
1 files changed, 1 insertions, 1 deletions
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)