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net: avoid NULL deref in napi_get_frags()

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napi_alloc_skb() can return NULL.
We should not crash should this happen.

Fixes: 93f93a4404 ("net: move skb_mark_napi_id() into core networking stack")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-11-19 12:11:23 -08:00 committed by David S. Miller
parent b3d39a8805
commit e2f9dc3bd2
1 changed files with 4 additions and 2 deletions
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6
net/core/dev.c
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@ -4390,8 +4390,10 @@ struct sk_buff *napi_get_frags(struct napi_struct *napi)
if (!skb) {
skb = napi_alloc_skb(napi, GRO_MAX_HEAD);
napi->skb = skb;
skb_mark_napi_id(skb, napi);
if (skb) {
napi->skb = skb;
skb_mark_napi_id(skb, napi);
}
}
return skb;
}