perf: Fix strncpy() use, always make sure it's NUL terminated

[cascardo/linux.git] / kernel / events / core.c

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 59412d0..7f0d67e 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4737,7 +4737,8 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
        } else {
                if (arch_vma_name(mmap_event->vma)) {
                        name = strncpy(tmp, arch_vma_name(mmap_event->vma),
-                                      sizeof(tmp));
+                                      sizeof(tmp) - 1);
+                       tmp[sizeof(tmp) - 1] = '\0';
                        goto got_name;
                }