[PATCH] kernel: events: strncpy, always be sure of NUL terminated.

[Chen Gang]

  for NUL terminated string, always be sure of '\0' at the end.
  
  in our case, need return value, so still use strncpy
    (strlcpy return the size, not the pointer)

Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx>
---
 kernel/events/core.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 4757941..bdc0e25 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4752,7 +4752,8 @@ 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;
 		}
 
-- 
1.7.7.6
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