netlink: mmap: fix tx type check (c953e239) · Commits · 戴 / test

I can't send netlink message via mmaped netlink socket since commit: netlink: make the check for "send from tx_ring" deterministic msg->msg_iter.type is set to WRITE (1) at SYSCALL_DEFINE6(sendto, ... import_single_range(WRITE, ... iov_iter_init(1, WRITE, ... call path, so that we need to check the type by iter_is_iovec() to accept the WRITE. Signed-off-by:

Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp> Signed-off-by:

David S. Miller <davem@davemloft.net>

net/netlink/af_netlink.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -2401,7 +2401,7 @@ static int netlink_sendmsg(struct socket sock, struct msghdr msg, size_t len)
	* sendmsg(), but that's what we've got...		* sendmsg(), but that's what we've got...
	*/		*/
	if (netlink_tx_is_mmaped(sk) &&		if (netlink_tx_is_mmaped(sk) &&
	msg->msg_iter.type == ITER_IOVEC &&		iter_is_iovec(&msg->msg_iter) &&
	msg->msg_iter.nr_segs == 1 &&		msg->msg_iter.nr_segs == 1 &&
	msg->msg_iter.iov->iov_base == NULL) {		msg->msg_iter.iov->iov_base == NULL) {
	err = netlink_mmap_sendmsg(sk, msg, dst_portid, dst_group,		err = netlink_mmap_sendmsg(sk, msg, dst_portid, dst_group,

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