diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/preempt_lock.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/preempt_lock.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/preempt_lock.c b/tools/testing/selftests/bpf/progs/preempt_lock.c index 6d5fce7e6ffc..81c459435680 100644 --- a/tools/testing/selftests/bpf/progs/preempt_lock.c +++ b/tools/testing/selftests/bpf/progs/preempt_lock.c @@ -115,6 +115,58 @@ int preempt_sleepable_helper(void *ctx) return 0; } +SEC("?uprobe.s") +__failure __msg("sleepable helper bpf_get_stack#") +int preempt_sleepable_get_stack(struct pt_regs *ctx) +{ + struct bpf_stack_build_id stack; + + bpf_preempt_disable(); + bpf_get_stack(ctx, &stack, sizeof(stack), + BPF_F_USER_STACK | BPF_F_USER_BUILD_ID); + bpf_preempt_enable(); + return 0; +} + +SEC("?uprobe.s") +__failure __msg("sleepable helper bpf_get_task_stack#") +int preempt_sleepable_get_task_stack(void *ctx) +{ + struct bpf_stack_build_id stack; + struct task_struct *task; + + task = bpf_get_current_task_btf(); + bpf_preempt_disable(); + bpf_get_task_stack(task, &stack, sizeof(stack), + BPF_F_USER_STACK | BPF_F_USER_BUILD_ID); + bpf_preempt_enable(); + return 0; +} + +SEC("?uprobe.s") +__success +int sleepable_get_stack(struct pt_regs *ctx) +{ + struct bpf_stack_build_id stack; + + bpf_get_stack(ctx, &stack, sizeof(stack), + BPF_F_USER_STACK | BPF_F_USER_BUILD_ID); + return 0; +} + +SEC("?uprobe.s") +__success +int sleepable_get_task_stack(void *ctx) +{ + struct bpf_stack_build_id stack; + struct task_struct *task; + + task = bpf_get_current_task_btf(); + bpf_get_task_stack(task, &stack, sizeof(stack), + BPF_F_USER_STACK | BPF_F_USER_BUILD_ID); + return 0; +} + SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") __failure __msg("kernel func bpf_copy_from_user_str is sleepable within non-preemptible region") int preempt_sleepable_kfunc(void *ctx) |