ACK: [SRU focal/linux-oem-5.6 1/1] io_uring: fix missing msg_name assignment

[Guilherme Piccoli]

On Fri, May 14, 2021 at 9:15 AM Thadeu Lima de Souza Cascardo
<cascardo at canonical.com> wrote:
>
> From: Pavel Begunkov <asml.silence at gmail.com>
>
> BugLink: https://bugs.launchpad.net/bugs/1928028
>
> Ensure to set msg.msg_name for the async portion of send/recvmsg,
> as the header copy will copy to/from it.
>
> Cc: stable at vger.kernel.org # v5.5+
> Signed-off-by: Pavel Begunkov <asml.silence at gmail.com>
> Signed-off-by: Jens Axboe <axboe at kernel.dk>
> (backported from commit dd821e0c95a64b5923a0c57f07d3f7563553e756)
> [cascardo: missing commit 52de1fe12240, there is no io_recvmsg_copy_hdr]
> [cascardo: also, recvmsg paths do not set msg_name when copying msg,
>  but use uaddr]
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
> ---
>  fs/io_uring.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/fs/io_uring.c b/fs/io_uring.c
> index 8276c3c42894..387d779ab26b 100644
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -3034,6 +3034,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
>         if (req->flags & REQ_F_NEED_CLEANUP)
>                 return 0;
>
> +       io->msg.msg.msg_name = &io->msg.addr;
>         io->msg.iov = io->msg.fast_iov;
>         ret = sendmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags,
>                                         &io->msg.iov);
> --

Thanks cascardo, LGTM:

Acked-by: Guilherme G. Piccoli <gpiccoli at canonical.com>