IB/cma: Fix a race condition in iboe_addr_get_sgid()
Code that dereferences the struct net_device ip_ptr member must be
protected with an in_dev_get() / in_dev_put() pair. Hence insert
calls to these functions.
Fixes: commit 7b85627b9f
("IB/cma: IBoE (RoCE) IP-based GID addressing")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -205,10 +205,12 @@ static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
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dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
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if (dev) {
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ip4 = (struct in_device *)dev->ip_ptr;
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if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
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ip4 = in_dev_get(dev);
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if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) {
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ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
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(struct in6_addr *)gid);
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in_dev_put(ip4);
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}
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dev_put(dev);
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}
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}
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