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| author | Denys Vlasenko | 2018-05-25 17:03:46 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2018-05-25 17:03:46 +0200 |
| commit | a36986bb80289c1cd8d15a557e49207c9a42946b (patch) | |
| tree | 15f40fd0cbd8906b29f14d1871db263445058cdf /archival/libarchive | |
| parent | 8f48fc01e9e43d16bf5860fa37252b43c76cb395 (diff) | |
| download | busybox-a36986bb80289c1cd8d15a557e49207c9a42946b.zip busybox-a36986bb80289c1cd8d15a557e49207c9a42946b.tar.gz | |
unlzma: close another SEGV possibility
function old new delta
unpack_lzma_stream 2669 2686 +17
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'archival/libarchive')
| -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 446319e..6886239 100644 --- a/archival/libarchive/decompress_unlzma.c +++ b/archival/libarchive/decompress_unlzma.c @@ -350,8 +350,12 @@ unpack_lzma_stream(transformer_state_t *xstate) state = state < LZMA_NUM_LIT_STATES ? 9 : 11; pos = buffer_pos - rep0; - if ((int32_t)pos < 0) + if ((int32_t)pos < 0) { pos += header.dict_size; + /* see unzip_bad_lzma_2.zip: */ + if (pos >= buffer_size) + goto bad; + } previous_byte = buffer[pos]; goto one_byte1; #else |