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vfs: fix uninitialized flags in splice_to_pipe()
commit 5a81e6a171
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@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -211,6 +211,7 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
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buf->len = spd->partial[page_nr].len;
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buf->private = spd->partial[page_nr].private;
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buf->ops = spd->ops;
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buf->flags = 0;
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if (spd->flags & SPLICE_F_GIFT)
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buf->flags |= PIPE_BUF_FLAG_GIFT;
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