From f45b36ed81bf3b33f030c769f696e028216ef609 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Fri, 27 Sep 2019 15:17:37 +0200 Subject: Fix lzma compressor: test if compression actually shrunk the data Signed-off-by: David Oberhollenzer --- lib/sqfs/comp/lzma.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'lib') diff --git a/lib/sqfs/comp/lzma.c b/lib/sqfs/comp/lzma.c index 82590c7..9fc507f 100644 --- a/lib/sqfs/comp/lzma.c +++ b/lib/sqfs/comp/lzma.c @@ -69,6 +69,9 @@ static ssize_t lzma_comp_block(sqfs_compressor_t *base, const uint8_t *in, if (ret != LZMA_STREAM_END) return ret == LZMA_OK ? 0 : SQFS_ERROR_COMRPESSOR; + if (strm.total_out > size) + return 0; + out[LZMA_SIZE_OFFSET ] = size & 0xFF; out[LZMA_SIZE_OFFSET + 1] = (size >> 8) & 0xFF; out[LZMA_SIZE_OFFSET + 2] = (size >> 16) & 0xFF; -- cgit v1.2.3