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RDMA/cxgb4: Fix crash when peer address is 0.0.0.0

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When using rping -c -a 0.0.0.0 with iw_cxgb4, the system crashes when
rdma_connect() is called.  ip_dev_find() will return NULL, but pdev is
accessed anyway.

Checking that pdev is NULL and returning -ENODEV prevents the system
from crashing.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Thadeu Lima de Souza Cascardo 2012-05-17 17:51:53 -03:00 committed by Roland Dreier
parent c23ddf7857
commit 71b43fd573
1 changed files with 4 additions and 0 deletions
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4
drivers/infiniband/hw/cxgb4/cm.c
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@ -1593,6 +1593,10 @@ static int import_ep(struct c4iw_ep *ep, __be32 peer_ip, struct dst_entry *dst,
struct net_device *pdev;
pdev = ip_dev_find(&init_net, peer_ip);
if (!pdev) {
err = -ENODEV;
goto out;
}
ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
n, pdev, 0);
if (!ep->l2t)