diff options
| -rw-r--r-- | tools/perf/examples/bpf/augmented_syscalls.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/examples/bpf/augmented_syscalls.c b/tools/perf/examples/bpf/augmented_syscalls.c index 0decbcfa8b90..2ae44813ef2d 100644 --- a/tools/perf/examples/bpf/augmented_syscalls.c +++ b/tools/perf/examples/bpf/augmented_syscalls.c @@ -51,8 +51,10 @@ int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \ augmented_args.filename.size = probe_read_str(&augmented_args.filename.value, \ sizeof(augmented_args.filename.value), \ args->filename_ptr); \ - if (augmented_args.filename.size < sizeof(augmented_args.filename.value)) \ + if (augmented_args.filename.size < sizeof(augmented_args.filename.value)) { \ len -= sizeof(augmented_args.filename.value) - augmented_args.filename.size; \ + len &= sizeof(augmented_args.filename.value) - 1; \ + } \ perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, \ &augmented_args, len); \ return 0; \ |