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net: fix NULL-deref in WARN() in skb_gso_segment()

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Bug was introduced in commit c8f44affb7.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław 2012-01-17 10:00:40 +00:00 committed by David S. Miller
parent 36c9247449
commit 65e9d2faab
1 changed files with 3 additions and 2 deletions
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5
net/core/dev.c
View file

@ -1889,6 +1889,7 @@ EXPORT_SYMBOL(skb_set_dev);
static void skb_warn_bad_offload(const struct sk_buff *skb)
{
static const netdev_features_t null_features = 0;
struct net_device *dev = skb->dev;
const char *driver = "";
@ -1897,8 +1898,8 @@ static void skb_warn_bad_offload(const struct sk_buff *skb)
WARN(1, "%s: caps=(%pNF, %pNF) len=%d data_len=%d gso_size=%d "
"gso_type=%d ip_summed=%d\n",
driver, dev ? &dev->features : NULL,
skb->sk ? &skb->sk->sk_route_caps : NULL,
driver, dev ? &dev->features : &null_features,
skb->sk ? &skb->sk->sk_route_caps : &null_features,
skb->len, skb->data_len, skb_shinfo(skb)->gso_size,
skb_shinfo(skb)->gso_type, skb->ip_summed);
}