Logic already return error if compression
make data bigger, let's sync logic with zlib
and also return error if compressed size
are equal to input size
Signed-off-by: Timofey Titovets <nefelim4ag@xxxxxxxxx>
---
fs/btrfs/lzo.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index f48c8c14..f66691e0 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -229,8 +229,10 @@ 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]);
--
2.13.0
--
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