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With valid files, the safety margin described in lib/decompress_unxz.c ensures that these buffers cannot overlap. But if the uncompressed size of the input is larger than the caller thought, which is possible when the input file is invalid/corrupt, the buffers can overlap. Obviously the result will then be garbage (and usually the decoder will return an error too) but no other harm will happen when such an over-run occurs. This change only affects uncompressed LZMA2 chunks and so this should have no effect on performance. Link: https://lore.kernel.org/r/20211010213145.17462-2-xiang@kernel.org Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> |
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.. | ||
Kconfig | ||
Makefile | ||
xz_crc32.c | ||
xz_dec_bcj.c | ||
xz_dec_lzma2.c | ||
xz_dec_stream.c | ||
xz_dec_syms.c | ||
xz_dec_test.c | ||
xz_lzma2.h | ||
xz_private.h | ||
xz_stream.h |