Commit 1e9d7291 authored May 30, 2017 by Timofey Titovets Committed by David Sterba Jun 19, 2017

Btrfs: lzo: compressed data size must be less then input size



Logic already skips if compression makes data bigger, let's sync lzo
with zlib and also return error if compressed size is equal to
input size.

Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>

parent 054ec2f6

fs/btrfs/lzo.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -230,8 +230,10 @@ static int lzo_compress_pages(struct list_head *ws,
		in_len = min(bytes_left, PAGE_SIZE);
		}

		if (tot_out > tot_in)
		if (tot_out >= tot_in) {
		ret = -E2BIG;
		goto out;
		}

		/* store the size of all chunks of compressed data */
		cpage_out = kmap(pages[0]);