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-rw-r--r--net/ipv4/netfilter/ipt_REDIRECT.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/net/ipv4/netfilter/ipt_REDIRECT.c b/net/ipv4/netfilter/ipt_REDIRECT.c
index d2e1344..715cb61 100644
--- a/net/ipv4/netfilter/ipt_REDIRECT.c
+++ b/net/ipv4/netfilter/ipt_REDIRECT.c
@@ -88,14 +88,18 @@ redirect_target(struct sk_buff **pskb,
newdst = htonl(0x7F000001);
else {
struct in_device *indev;
+ struct in_ifaddr *ifa;
- /* Device might not have an associated in_device. */
- indev = (struct in_device *)(*pskb)->dev->ip_ptr;
- if (indev == NULL || indev->ifa_list == NULL)
- return NF_DROP;
+ newdst = 0;
+
+ rcu_read_lock();
+ indev = __in_dev_get((*pskb)->dev);
+ if (indev && (ifa = indev->ifa_list))
+ newdst = ifa->ifa_local;
+ rcu_read_unlock();
- /* Grab first address on interface. */
- newdst = indev->ifa_list->ifa_local;
+ if (!newdst)
+ return NF_DROP;
}
/* Transfer from original range. */
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