net: core: Prevent from dereferencing null pointer when releasing SKB
Added NULL check to make __dev_kfree_skb_irq consistent with kfree family of functions. Link: https://bugzilla.kernel.org/show_bug.cgi?id=195289 Signed-off-by: Myungho Jung <mhjungk@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2450,6 +2450,9 @@ void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason)
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{
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unsigned long flags;
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if (unlikely(!skb))
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return;
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if (likely(atomic_read(&skb->users) == 1)) {
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smp_rmb();
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atomic_set(&skb->users, 0);
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