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;                                                                               \