X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=fs%2Fbtrfs%2Fcompression.c;h=b01fb6c527e32e7443cc5d461138222d5b538b9d;hb=dea054fc7f35d4664000b1e684713a83c2bd0888;hp=e2600cdb6c257e366b873445c396a917249e76f3;hpb=878a876b2e10888afe53766dcca33f723ae20edc;p=firefly-linux-kernel-4.4.55.git

diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index e2600cdb6c25..b01fb6c527e3 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -1010,6 +1010,8 @@ int btrfs_decompress_buf2page(char *buf, unsigned long buf_start,
 		bytes = min(bytes, working_bytes);
 		kaddr = kmap_atomic(page_out);
 		memcpy(kaddr + *pg_offset, buf + buf_offset, bytes);
+		if (*pg_index == (vcnt - 1) && *pg_offset == 0)
+			memset(kaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
 		kunmap_atomic(kaddr);
 		flush_dcache_page(page_out);