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-rw-r--r--tools/perf/util/header.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 062383e225a3..c4ed3dc2c8f4 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -3323,6 +3323,14 @@ int perf_session__write_header(struct perf_session *session,
attr_offset = lseek(ff.fd, 0, SEEK_CUR);
evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.attr.size < sizeof(evsel->core.attr)) {
+ /*
+ * We are likely in "perf inject" and have read
+ * from an older file. Update attr size so that
+ * reader gets the right offset to the ids.
+ */
+ evsel->core.attr.size = sizeof(evsel->core.attr);
+ }
f_attr = (struct perf_file_attr){
.attr = evsel->core.attr,
.ids = {