1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2024 Meta Platforms, Inc */ 3 #include <vmlinux.h> 4 #include <bpf/bpf_helpers.h> 5 #include "bpf_misc.h" 6 #include "bpf_kfuncs.h" 7 #include "../bpf_testmod/bpf_testmod_kfunc.h" 8 9 SEC("tc") 10 int kfunc_dynptr_nullable_test1(struct __sk_buff *skb) 11 { 12 struct bpf_dynptr data; 13 14 bpf_dynptr_from_skb(skb, 0, &data); 15 bpf_kfunc_dynptr_test(&data, NULL); 16 17 return 0; 18 } 19 20 SEC("tc") 21 int kfunc_dynptr_nullable_test2(struct __sk_buff *skb) 22 { 23 struct bpf_dynptr data; 24 25 bpf_dynptr_from_skb(skb, 0, &data); 26 bpf_kfunc_dynptr_test(&data, &data); 27 28 return 0; 29 } 30 31 SEC("tc") 32 __failure __msg("expected pointer to stack or const struct bpf_dynptr") 33 int kfunc_dynptr_nullable_test3(struct __sk_buff *skb) 34 { 35 struct bpf_dynptr data; 36 37 bpf_dynptr_from_skb(skb, 0, &data); 38 bpf_kfunc_dynptr_test(NULL, &data); 39 40 return 0; 41 } 42 43 char _license[] SEC("license") = "GPL"; 44