diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c b/tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c index 4184c399d4c6..977ab433a946 100644 --- a/tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c +++ b/tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c @@ -24,13 +24,19 @@ static void get_stack_print_output(void *ctx, int cpu, void *data, __u32 size) { bool good_kern_stack = false, good_user_stack = false; const char *nonjit_func = "___bpf_prog_run"; - struct get_stack_trace_t *e = data; + /* perfbuf-submitted data is 4-byte aligned, but we need 8-byte + * alignment, so copy data into a local variable, for simplicity + */ + struct get_stack_trace_t e; int i, num_stack; static __u64 cnt; struct ksym *ks; cnt++; + memset(&e, 0, sizeof(e)); + memcpy(&e, data, size <= sizeof(e) ? size : sizeof(e)); + if (size < sizeof(struct get_stack_trace_t)) { __u64 *raw_data = data; bool found = false; @@ -57,19 +63,19 @@ static void get_stack_print_output(void *ctx, int cpu, void *data, __u32 size) good_user_stack = true; } } else { - num_stack = e->kern_stack_size / sizeof(__u64); + num_stack = e.kern_stack_size / sizeof(__u64); if (env.jit_enabled) { good_kern_stack = num_stack > 0; } else { for (i = 0; i < num_stack; i++) { - ks = ksym_search(e->kern_stack[i]); + ks = ksym_search(e.kern_stack[i]); if (ks && (strcmp(ks->name, nonjit_func) == 0)) { good_kern_stack = true; break; } } } - if (e->user_stack_size > 0 && e->user_stack_buildid_size > 0) + if (e.user_stack_size > 0 && e.user_stack_buildid_size > 0) good_user_stack = true; } |