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-rw-r--r--archival/libarchive/decompress_unlzma.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/archival/libarchive/decompress_unlzma.c b/archival/libarchive/decompress_unlzma.c
index 0744f23..fb5aac8 100644
--- a/archival/libarchive/decompress_unlzma.c
+++ b/archival/libarchive/decompress_unlzma.c
@@ -290,8 +290,11 @@ unpack_lzma_stream(transformer_state_t *xstate)
uint32_t pos;
pos = buffer_pos - rep0;
- if ((int32_t)pos < 0)
+ if ((int32_t)pos < 0) {
pos += header.dict_size;
+ if ((int32_t)pos < 0)
+ goto bad;
+ }
match_byte = buffer[pos];
do {
int bit;