From: Jens Axboe <axboe@kernel.dk>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net
Subject: [PATCHSET 0/2] Disallow ancillary data from __sys_{recv,send}msg_file()
Date: Mon, 25 Nov 2019 18:31:43 -0700 [thread overview]
Message-ID: <20191126013145.23426-1-axboe@kernel.dk> (raw)
io_uring currently uses __sys_sendmsg_file() and __sys_recvmsg_file() to
handle sendmsg and recvmsg operations. This generally works fine, but we
don't want to allow cmsg type operations, just "normal" data transfers.
This small patchset first splits the msghdr copy from the two main
helpers in net/socket.c, then changes __sys_sendmsg_file() and
__sys_recvmsg_file() to use those helpers. With patch 2, we also add a
check to explicitly check for msghdr->msg_control and
msghdr->msg_controllen and return -EINVAL if they are set.
net/socket.c | 184 ++++++++++++++++++++++++++++++++++++---------------
1 file changed, 132 insertions(+), 52 deletions(-)
--
Jens Axboe
next reply other threads:[~2019-11-26 1:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-26 1:31 Jens Axboe [this message]
2019-11-26 1:31 ` [PATCH 1/2] net: separate out the msghdr copy from ___sys_{send,recv}msg() Jens Axboe
2019-11-26 1:31 ` [PATCH 2/2] net: disallow ancillary data for __sys_{send,recv}msg_file() Jens Axboe
2019-11-26 22:00 ` [PATCHSET 0/2] Disallow ancillary data from __sys_{recv,send}msg_file() David Miller
2019-11-26 22:04 ` Jens Axboe
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