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 4.9-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-4.9 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
@@ -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++;
Patches currently in stable-queue which might be from mszeredi@xxxxxxxxxx are
queue-4.9/vfs-fix-uninitialized-flags-in-splice_to_pipe.patch
queue-4.9/fuse-fix-uninitialized-flags-in-pipe_buffer.patch
queue-4.9/fuse-fix-use-after-free-issue-in-fuse_dev_do_read.patch