[NETFILTER]: Fix rcu race in ipt_REDIRECT
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -88,14 +88,18 @@ redirect_target(struct sk_buff **pskb,
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newdst = htonl(0x7F000001);
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else {
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struct in_device *indev;
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struct in_ifaddr *ifa;
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/* Device might not have an associated in_device. */
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indev = (struct in_device *)(*pskb)->dev->ip_ptr;
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if (indev == NULL || indev->ifa_list == NULL)
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newdst = 0;
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rcu_read_lock();
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indev = __in_dev_get((*pskb)->dev);
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if (indev && (ifa = indev->ifa_list))
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newdst = ifa->ifa_local;
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rcu_read_unlock();
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if (!newdst)
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return NF_DROP;
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/* Grab first address on interface. */
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newdst = indev->ifa_list->ifa_local;
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}
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/* Transfer from original range. */
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