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RDMA/i40iw: fix a potential NULL pointer dereference

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commit 04db1580b5 upstream.

A NULL pointer can be returned by in_dev_get(). Thus add a corresponding
check so that a NULL pointer dereference will be avoided at this place.

Fixes: 8e06af711b ("i40iw: add main, hdr, status")
Link: https://lore.kernel.org/r/1577672668-46499-1-git-send-email-xiyuyang19@fudan.edu.cn
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiyu Yang
2019-12-30 10:24:28 +08:00
committed by Greg Kroah-Hartman
parent b1f90d263a
commit 33daaea78a
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/hw/i40iw/i40iw_main.c
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@@ -1225,6 +1225,8 @@ static void i40iw_add_ipv4_addr(struct i40iw_device *iwdev)
const struct in_ifaddr *ifa;
idev = in_dev_get(dev);
if (!idev)
continue;
in_dev_for_each_ifa_rtnl(ifa, idev) {
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
"IP=%pI4, vlan_id=%d, MAC=%pM\n", &ifa->ifa_address,