In this afternoon, i find this statement in alloc_skb function: " memset(skb, 0, offsetof(struct sk_buff, truesize));" After " security_skb_alloc " function, the skb->lsm_security is set to 0. Maybe i am wrong. But if it happen, it's NOT necessary to allocate sk_buff security struct . Can someone tell me what's the reason?
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