diff options
| -rw-r--r-- | tools/perf/util/session.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 6b71b88..951a1cf 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1094,8 +1094,10 @@ more: perf_event_header__bswap(&event->header); size = event->header.size; - if (size == 0) - size = 8; + if (size < sizeof(struct perf_event_header)) { + pr_err("bad event header size\n"); + goto out_err; + } if (size > cur_size) { void *new = realloc(buf, size); @@ -1164,8 +1166,12 @@ fetch_mmaped_event(struct perf_session *session, if (session->header.needs_swap) perf_event_header__bswap(&event->header); - if (head + event->header.size > mmap_size) + if (head + event->header.size > mmap_size) { + /* We're not fetching the event so swap back again */ + if (session->header.needs_swap) + perf_event_header__bswap(&event->header); return NULL; + } return event; } @@ -1245,7 +1251,7 @@ more: size = event->header.size; - if (size == 0 || + if (size < sizeof(struct perf_event_header) || perf_session__process_event(session, event, tool, file_pos) < 0) { pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", file_offset + head, event->header.size, |