rds: prevent dereference of a NULL device in rds_iw_laddr_check

[ Upstream commit bf39b4247b ]

Binding might result in a NULL device which is later dereferenced
without checking.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sasha Levin 2014-03-29 20:39:35 -04:00 committed by Greg Kroah-Hartman
parent 8c3911a71e
commit 0447707579

View file

@ -239,7 +239,8 @@ static int rds_iw_laddr_check(__be32 addr)
ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
/* due to this, we will claim to support IB devices unless we
check node_type. */
if (ret || cm_id->device->node_type != RDMA_NODE_RNIC)
if (ret || !cm_id->device ||
cm_id->device->node_type != RDMA_NODE_RNIC)
ret = -EADDRNOTAVAIL;
rdsdebug("addr %pI4 ret %d node type %d\n",