1 files changed, 2 insertions, 1 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 73ddaf06b8e7..2a6f33cd888c 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -74,6 +74,7 @@ static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
                         if (size >= len)
                                 size = len - 1;
                         memcpy(comm, name, size);
+                        comm[size] = '\0';
 
                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
                         char *tgids = bf + 5;
@@ -554,7 +555,7 @@ static int perf_event__process_kernel_mmap(struct perf_tool *tool __used,
 
         is_kernel_mmap = memcmp(event->mmap.filename,
                                 kmmap_prefix,
-                                strlen(kmmap_prefix)) == 0;
+                                strlen(kmmap_prefix) - 1) == 0;
         if (event->mmap.filename[0] == '/' ||
             (!is_kernel_mmap && event->mmap.filename[0] == '[')) {