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| author | Ursula Braun <ubraun@linux.vnet.ibm.com> | 2017-01-12 14:57:15 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-12 09:47:01 -0500 |
| commit | 143c017108f8a695e4e1c1f5ec57ee89be9cad70 (patch) | |
| tree | 397034c602b8b7ef3982b76193bb63c13583d985 /net/smc | |
| parent | 526735ddc0ae8c7a7751e9ad3a57ae76cd3c35d5 (diff) | |
| download | blackbird-op-linux-143c017108f8a695e4e1c1f5ec57ee89be9cad70.tar.gz blackbird-op-linux-143c017108f8a695e4e1c1f5ec57ee89be9cad70.zip | |
smc: ETH_ALEN as memcpy length for mac addresses
When creating an SMC connection, there is a CLC (connection layer control)
handshake to prepare for RDMA traffic. The corresponding code is part of
commit 0cfdd8f92cac ("smc: connection and link group creation").
Mac addresses to be exchanged in the handshake are copied with a wrong
length of 12 instead of 6 bytes. Following code overwrites the wrongly
copied code, but nevertheless the correct length should already be used for
the preceding mac address copying. Use ETH_ALEN for the memcpy length with
mac addresses.
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Fixes: 0cfdd8f92cac ("smc: connection and link group creation")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc')
| -rw-r--r-- | net/smc/smc_clc.c | 10 | ||||
| -rw-r--r-- | net/smc/smc_ib.h | 4 |
2 files changed, 7 insertions, 7 deletions
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index e1e684c562b8..cc6b6f8651eb 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -10,6 +10,7 @@ */ #include <linux/in.h> +#include <linux/if_ether.h> #include <net/sock.h> #include <net/tcp.h> @@ -151,8 +152,7 @@ int smc_clc_send_proposal(struct smc_sock *smc, pclc.hdr.version = SMC_CLC_V1; /* SMC version */ memcpy(pclc.lcl.id_for_peer, local_systemid, sizeof(local_systemid)); memcpy(&pclc.lcl.gid, &smcibdev->gid[ibport - 1], SMC_GID_SIZE); - memcpy(&pclc.lcl.mac, &smcibdev->mac[ibport - 1], - sizeof(smcibdev->mac[ibport - 1])); + memcpy(&pclc.lcl.mac, &smcibdev->mac[ibport - 1], ETH_ALEN); /* determine subnet and mask from internal TCP socket */ rc = smc_netinfo_by_tcpsk(smc->clcsock, &pclc.outgoing_subnet, @@ -199,8 +199,7 @@ int smc_clc_send_confirm(struct smc_sock *smc) memcpy(cclc.lcl.id_for_peer, local_systemid, sizeof(local_systemid)); memcpy(&cclc.lcl.gid, &link->smcibdev->gid[link->ibport - 1], SMC_GID_SIZE); - memcpy(&cclc.lcl.mac, &link->smcibdev->mac[link->ibport - 1], - sizeof(link->smcibdev->mac)); + memcpy(&cclc.lcl.mac, &link->smcibdev->mac[link->ibport - 1], ETH_ALEN); hton24(cclc.qpn, link->roce_qp->qp_num); cclc.rmb_rkey = htonl(conn->rmb_desc->mr_rx[SMC_SINGLE_LINK]->rkey); @@ -252,8 +251,7 @@ int smc_clc_send_accept(struct smc_sock *new_smc, int srv_first_contact) memcpy(aclc.lcl.id_for_peer, local_systemid, sizeof(local_systemid)); memcpy(&aclc.lcl.gid, &link->smcibdev->gid[link->ibport - 1], SMC_GID_SIZE); - memcpy(&aclc.lcl.mac, link->smcibdev->mac[link->ibport - 1], - sizeof(link->smcibdev->mac[link->ibport - 1])); + memcpy(&aclc.lcl.mac, link->smcibdev->mac[link->ibport - 1], ETH_ALEN); hton24(aclc.qpn, link->roce_qp->qp_num); aclc.rmb_rkey = htonl(conn->rmb_desc->mr_rx[SMC_SINGLE_LINK]->rkey); diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h index 3fe2d55c6051..a95f74bb5569 100644 --- a/net/smc/smc_ib.h +++ b/net/smc/smc_ib.h @@ -11,6 +11,7 @@ #ifndef _SMC_IB_H #define _SMC_IB_H +#include <linux/if_ether.h> #include <rdma/ib_verbs.h> #define SMC_MAX_PORTS 2 /* Max # of ports */ @@ -34,7 +35,8 @@ struct smc_ib_device { /* ib-device infos for smc */ struct ib_cq *roce_cq_recv; /* recv completion queue */ struct tasklet_struct send_tasklet; /* called by send cq handler */ struct tasklet_struct recv_tasklet; /* called by recv cq handler */ - char mac[SMC_MAX_PORTS][6]; /* mac address per port*/ + char mac[SMC_MAX_PORTS][ETH_ALEN]; + /* mac address per port*/ union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */ u8 initialized : 1; /* ib dev CQ, evthdl done */ struct work_struct port_event_work; |
