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| author | Jordan Rome <linux@jordanrome.com> | 2023-11-11 18:30:10 -0800 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2023-11-13 18:39:38 -0800 |
| commit | 727a92d62fd6a382b4c5972008e45667e707b0e4 (patch) | |
| tree | bdf6000120c9329940c8ca3bca6fe8412bc340e9 /tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c | |
| parent | 100888fb6d8a185866b1520031ee7e3182b173de (diff) | |
| download | linux-727a92d62fd6a382b4c5972008e45667e707b0e4.tar.gz linux-727a92d62fd6a382b4c5972008e45667e707b0e4.tar.bz2 linux-727a92d62fd6a382b4c5972008e45667e707b0e4.zip | |
selftests/bpf: Add assert for user stacks in test_task_stack
This is a follow up to:
commit b8e3a87a627b ("bpf: Add crosstask check to __bpf_get_stack").
This test ensures that the task iterator only gets a single
user stack (for the current task).
Signed-off-by: Jordan Rome <linux@jordanrome.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20231112023010.144675-1-linux@jordanrome.com
Diffstat (limited to 'tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c index f2b8167b72a8..442f4ca39fd7 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c @@ -35,6 +35,8 @@ int dump_task_stack(struct bpf_iter__task *ctx) return 0; } +int num_user_stacks = 0; + SEC("iter/task") int get_task_user_stacks(struct bpf_iter__task *ctx) { @@ -51,6 +53,9 @@ int get_task_user_stacks(struct bpf_iter__task *ctx) if (res <= 0) return 0; + /* Only one task, the current one, should succeed */ + ++num_user_stacks; + buf_sz += res; /* If the verifier doesn't refine bpf_get_task_stack res, and instead |