This is a note to let you know that I've just added the patch titled vfs: fix uninitialized flags in splice_to_pipe() to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: vfs-fix-uninitialized-flags-in-splice_to_pipe.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 5a81e6a171cdbd1fa8bc1fdd80c23d3d71816fac Mon Sep 17 00:00:00 2001 From: Miklos Szeredi <mszeredi@xxxxxxxxxx> Date: Thu, 16 Feb 2017 17:49:02 +0100 Subject: vfs: fix uninitialized flags in splice_to_pipe() 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 @@ -211,6 +211,7 @@ 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; if (spd->flags & SPLICE_F_GIFT) buf->flags |= PIPE_BUF_FLAG_GIFT; Patches currently in stable-queue which might be from mszeredi@xxxxxxxxxx are queue-4.4/vfs-fix-uninitialized-flags-in-splice_to_pipe.patch queue-4.4/fuse-fix-use-after-free-issue-in-fuse_dev_do_read.patch