Commit ab6f6dd1 authored Mar 27, 2018 by Ursula Braun Committed by David S. Miller Mar 27, 2018

net/smc: use announced length in sock_recvmsg()



Not every CLC proposal message needs the maximum buffer length.
Due to the MSG_WAITALL flag, it is important to use the peeked
real length when receiving the message.

Fixes: d63d271c ("smc: switch to sock_recvmsg()")
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b85ab56c

net/smc/smc_clc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -133,7 +133,7 @@ int smc_clc_wait_msg(struct smc_sock smc, void buf, int buflen,

		/* receive the complete CLC message */
		memset(&msg, 0, sizeof(struct msghdr));
		iov_iter_kvec(&msg.msg_iter, READ \| ITER_KVEC, &vec, 1, buflen);
		iov_iter_kvec(&msg.msg_iter, READ \| ITER_KVEC, &vec, 1, datlen);
		krflags = MSG_WAITALL;
		smc->clcsock->sk->sk_rcvtimeo = CLC_WAIT_TIME;
		len = sock_recvmsg(smc->clcsock, &msg, krflags);

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