From da3fd21425e51e65b20903fd7176e16bfb8e6c3d Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Thu, 16 Feb 2017 17:49:02 +0100 Subject: [PATCH] vfs: fix uninitialized flags in splice_to_pipe() 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 Signed-off-by: Linus Torvalds [bwh: Backported to 3.2: adjust context, indentation] Signed-off-by: Ben Hutchings --- fs/splice.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/splice.c b/fs/splice.c index 459128ba084a..4cf2cba02dfd 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -214,6 +214,7 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe, buf->len = spd->partial[page_nr].len; buf->private = spd->partial[page_nr].private; buf->ops = spd->ops; + buf->flags = 0; if (spd->flags & SPLICE_F_GIFT) buf->flags |= PIPE_BUF_FLAG_GIFT; -- 2.39.2