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-rw-r--r--tools/perf/util/session.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index fff6674..61746b5 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1007,6 +1007,13 @@ remap:
file_pos = file_offset + head;
more:
+ /*
+ * Ensure we have enough space remaining to read
+ * the size of the event in the headers.
+ */
+ if (head + sizeof(event->header) > mmap_size)
+ goto remap;
+
event = (union perf_event *)(buf + head);
if (session->header.needs_swap)
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