1 files changed, 5 insertions, 0 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index c846482e7985..88f9df7bfdae 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4233,6 +4233,11 @@ again:
                                 map = kmap(page);
                                 read_extent_buffer(leaf, map + pg_offset, ptr,
                                                    copy_size);
+                                if (pg_offset + copy_size < PAGE_CACHE_SIZE) {
+                                        memset(map + pg_offset + copy_size, 0,
+                                               PAGE_CACHE_SIZE - pg_offset -
+                                               copy_size);
+                                }
                                 kunmap(page);
                         }
                         flush_dcache_page(page);