diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/dynptr_success.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/dynptr_success.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/dynptr_success.c b/tools/testing/selftests/bpf/progs/dynptr_success.c index 5985920d162e..bfcc85686cf0 100644 --- a/tools/testing/selftests/bpf/progs/dynptr_success.c +++ b/tools/testing/selftests/bpf/progs/dynptr_success.c @@ -5,6 +5,7 @@ #include <stdbool.h> #include <linux/bpf.h> #include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> #include "bpf_misc.h" #include "bpf_kfuncs.h" #include "errno.h" @@ -544,3 +545,25 @@ int test_dynptr_skb_strcmp(struct __sk_buff *skb) return 1; } + +SEC("tp_btf/kfree_skb") +int BPF_PROG(test_dynptr_skb_tp_btf, void *skb, void *location) +{ + __u8 write_data[2] = {1, 2}; + struct bpf_dynptr ptr; + int ret; + + if (bpf_dynptr_from_skb(skb, 0, &ptr)) { + err = 1; + return 1; + } + + /* since tp_btf skbs are read only, writes should fail */ + ret = bpf_dynptr_write(&ptr, 0, write_data, sizeof(write_data), 0); + if (ret != -EINVAL) { + err = 2; + return 1; + } + + return 1; +} |