4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miklos Szeredi <mszeredi@xxxxxxxxxx> commit 5a81e6a171cdbd1fa8bc1fdd80c23d3d71816fac upstream. Flags (PIPE_BUF_FLAG_PACKET, PIPE_BUF_FLAG_GIFT) could remain on the unused part of the pipe ring buffer. Previously splice_to_pipe() left the flags value alone, which could result in incorrect behavior. Uninitialized flags appears to have been there from the introduction of the splice syscall. Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/splice.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/splice.c +++ b/fs/splice.c @@ -203,6 +203,7 @@ ssize_t splice_to_pipe(struct pipe_inode buf->len = spd->partial[page_nr].len; buf->private = spd->partial[page_nr].private; buf->ops = spd->ops; + buf->flags = 0; pipe->nrbufs++; page_nr++;