From: Ursula Braun Date: Tue, 27 Mar 2018 08:43:50 +0000 (+0200) Subject: net/smc: use announced length in sock_recvmsg() X-Git-Tag: v4.16~5^2~17 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=ab6f6dd18ab801fcbbaa05fb5401e91f48778e04;p=linux.git 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: d63d271ce2b5ce ("smc: switch to sock_recvmsg()") Signed-off-by: Ursula Braun Signed-off-by: David S. Miller --- diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 8ac51583a063..15c213250606 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -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);