diff options
| -rw-r--r-- | archival/libarchive/decompress_unlzma.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/archival/libarchive/decompress_unlzma.c b/archival/libarchive/decompress_unlzma.c index a904087..be43424 100644 --- a/archival/libarchive/decompress_unlzma.c +++ b/archival/libarchive/decompress_unlzma.c @@ -450,8 +450,12 @@ unpack_lzma_stream(transformer_state_t *xstate) IF_NOT_FEATURE_LZMA_FAST(string:) do { uint32_t pos = buffer_pos - rep0; - if ((int32_t)pos < 0) + if ((int32_t)pos < 0) { pos += header.dict_size; + /* bug 10436 has an example file where this triggers: */ + if ((int32_t)pos < 0) + goto bad; + } previous_byte = buffer[pos]; IF_NOT_FEATURE_LZMA_FAST(one_byte2:) buffer[buffer_pos++] = previous_byte; |