diff options
| author | Lasse Collin <lasse.collin@tukaani.org> | 2022-09-09 13:51:57 +0300 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2022-09-09 13:51:57 +0300 |
| commit | f8ee61e74eb40600445fdb601c374d582e1e9c8a (patch) | |
| tree | 7f2d7b0545b4824a91b3947b220b77987c791ba3 /src/common | |
| parent | liblzma: lzma_index_append: Add missing integer overflow check. (diff) | |
| download | xz-f8ee61e74eb40600445fdb601c374d582e1e9c8a.tar.xz | |
liblzma: lzma_filters_copy: Keep dest[] unmodified if an error occurs.
lzma_stream_encoder() and lzma_stream_encoder_mt() always assumed
this. Before this patch, failing lzma_filters_copy() could result
in free(invalid_pointer) or invalid memory reads in stream_encoder.c
or stream_encoder_mt.c.
To trigger this, allocating memory for a filter options structure
has to fail. These are tiny allocations so in practice they very
rarely fail.
Certain badness in the filter chain array could also make
lzma_filters_copy() fail but both stream_encoder.c and
stream_encoder_mt.c validate the filter chain before
trying to copy it, so the crash cannot occur this way.
Diffstat (limited to 'src/common')
0 files changed, 0 insertions, 0 deletions