net/core/filter.c

549  *	@new_prog: allocated 'struct bpf_prog' or NULL
558  *   bpf_convert_filter(old_prog, old_len, NULL, &new_len, &seen_ld_abs)
569 	struct bpf_insn *new_insn, *first_insn = NULL;
571 	int *addrs = NULL;
1038 	if (filter == NULL)
1273 	err = bpf_convert_filter(old_prog, old_len, NULL, &new_len,
1322 	fp->bpf_func = NULL;
1386 	fp->orig_prog = NULL;
1391 	fp = bpf_prepare_filter(fp, NULL);
1432 	fp->orig_prog = NULL;
1520 	return bpf_prepare_filter(prog, NULL);
1875 	return sk_fullsock(sk) ? (unsigned long)sk : (unsigned long)NULL;
2198 	struct dst_entry *dst = NULL;
2263 		dst = ipv6_stub->ipv6_dst_lookup_flow(net, NULL, &fl6, NULL);
2368 		rt = ip_route_output_flow(net, &fl4, NULL);
2482 	return NULL;
2511 				    &ri->nh : NULL) :
4012 	return offset + len <= size ? addr + offset : NULL;
4109 		__xdp_return(NULL, mem_info, false, zc_frag);
4129 		__xdp_return(page_address(page), mem_info, false, NULL);
4302 			cmpxchg(&ri->map, map, NULL);
4391 			WRITE_ONCE(ri->map, NULL);
4479 			WRITE_ONCE(ri->map, NULL);
4876 			return NULL;
4877 		if (cmpxchg(&md_dst, NULL, tmp))
4887 		return NULL;
5133 	return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL);
5145 	return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL);
5157 	return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL);
5280 		/* BPF expects NULL-terminated tcp-cc string */
5766 		/* ipv6_bpf_stub cannot be NULL, since it's called from
5912 		fl4.flowi4_uid = sock_net_uid(net, NULL);
5933 		fib_select_path(net, &res, &fl4, NULL);
6055 		fl6.flowi6_uid = sock_net_uid(net, NULL);
6079 				    fl6.flowi6_oif != 0, NULL, strict);
6370 	return seg6_lookup_nexthop(skb, NULL, 0);
6443 	if (srh == NULL)
6458 	if (ipv6_find_hdr(skb, &srhoff, IPPROTO_ROUTING, NULL, NULL) < 0)
6482 	if (ipv6_find_hdr(skb, &srhoff, IPPROTO_ROUTING, NULL, NULL) < 0) {
6483 		srh_state->srh = NULL;
6511 		return seg6_lookup_nexthop(skb, NULL, *(int *)param);
6518 		if (ipv6_find_hdr(skb, &hdroff, IPPROTO_IPV6, NULL, NULL) < 0)
6530 		return seg6_lookup_nexthop(skb, NULL, *(int *)param);
6575 	if (unlikely(srh == NULL))
6606 	if (ipv6_find_hdr(skb, &srhoff, IPPROTO_ROUTING, NULL, NULL) < 0)
6630 	struct sock *sk = NULL;
6637 			sk = __inet_lookup(net, hinfo, NULL, 0,
6644 					       dif, sdif, net->ipv4.udp_table, NULL);
6651 			sk = __inet6_lookup(net, hinfo, NULL, 0,
6660 							    net->ipv4.udp_table, NULL);
6666 		sk = NULL;
6679 	struct sock *sk = NULL;
6688 		return NULL;
6731 			sk2 = NULL;
6737 				return NULL;
6779 			sk2 = NULL;
6785 				return NULL;
6944 	return (unsigned long)__bpf_sk_lookup(NULL, tuple, len, caller_net,
6968 	return (unsigned long)__bpf_skc_lookup(NULL, tuple, len, caller_net,
6992 	return (unsigned long)__bpf_sk_lookup(NULL, tuple, len, caller_net,
7012 	return (unsigned long)__bpf_skc_lookup(NULL, tuple, len,
7032 	return (unsigned long)__bpf_sk_lookup(NULL, tuple, len,
7051 	return (unsigned long)__bpf_sk_lookup(NULL, tuple, len,
7214 	return (unsigned long)NULL;
7231 	return (unsigned long)NULL;
7559 		magic = NULL;
7610 	const u8 *op, *new_op, *magic = NULL;
7943 			return NULL;
7986 			return NULL;
8009 			return NULL;
10701 		/* Reserve one insn to test skb == NULL */
11101 		RCU_INIT_POINTER(sk->sk_filter, NULL);
11162 	reuse_kern->selected_sk = NULL;
11204 		/* reuseport_array has only sk with non NULL sk_reuseport_cb.
11656 	return (unsigned long)NULL;
11672 	return (unsigned long)NULL;
11701 	return (unsigned long)NULL;
11724 	return (unsigned long)NULL;
11745 	return (unsigned long)NULL;
11765 	return (unsigned long)NULL;
11842 		return NULL;
12068  * The function expects a non-NULL pointer to a socket, and invokes the