From: Miklos Szeredi <mszeredi@redhat.com>
Date: Thu, 16 Feb 2017 16:49:02 +0000 (+0100)
Subject: vfs: fix uninitialized flags in splice_to_pipe()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5a81e6a171cdbd1fa8bc1fdd80c23d3d71816fac;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

vfs: fix uninitialized flags in splice_to_pipe()

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@redhat.com>
Cc: <stable@vger.kernel.org> # 2.6.17+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/splice.c b/fs/splice.c
index 873d83104e79..4ef78aa8ef61 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -204,6 +204,7 @@ 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;
 
 		pipe->nrbufs++;
 		page_nr++;