diff options
| author | Feng Zhou <zhoufeng.zf@bytedance.com> | 2023-04-10 16:59:08 +0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-04-11 20:29:49 +0200 |
| commit | 75dcef8d3609d0b1d3497d6ed4809096513e0b83 (patch) | |
| tree | 426292d8f50eb626ae13c785460c78bd5d2b2d51 /net/bpf | |
| parent | 91f2dc6838c19342f7f2993627c622835cc24890 (diff) | |
| download | lwn-75dcef8d3609d0b1d3497d6ed4809096513e0b83.tar.gz lwn-75dcef8d3609d0b1d3497d6ed4809096513e0b83.zip | |
selftests/bpf: Add test to access u32 ptr argument in tracing program
Adding verifier test for accessing u32 pointer argument in
tracing programs.
The test program loads 1nd argument of bpf_fentry_test9 function
which is u32 pointer and checks that verifier allows that.
Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20230410085908.98493-3-zhoufeng.zf@bytedance.com
Diffstat (limited to 'net/bpf')
| -rw-r--r-- | net/bpf/test_run.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index f1652f5fbd2e..68bdfc041a7b 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -541,6 +541,11 @@ int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg) return (long)arg->a; } +__bpf_kfunc u32 bpf_fentry_test9(u32 *a) +{ + return *a; +} + __bpf_kfunc int bpf_modify_return_test(int a, int *b) { *b += 1; @@ -855,7 +860,8 @@ int bpf_prog_test_run_tracing(struct bpf_prog *prog, bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 || bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111 || bpf_fentry_test7((struct bpf_fentry_test_t *)0) != 0 || - bpf_fentry_test8(&arg) != 0) + bpf_fentry_test8(&arg) != 0 || + bpf_fentry_test9(&retval) != 0) goto out; break; case BPF_MODIFY_RETURN: |