diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2022-05-11 16:27:06 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-05-11 16:27:06 +0200 |
| commit | 47319846a9e2ab1c4d22108e891818d003615bd8 (patch) | |
| tree | 919dbed5c01d3ad4db009bd38bb12cfd3d038246 /tools/perf/util/session.c | |
| parent | 3d47083b9ff46863e8374ad3bb5edb5e464c75f8 (diff) | |
| parent | 672c0c5173427e6b3e2a9bbb7be51ceeec78093a (diff) | |
Merge branch 'v5.18-rc5'
Obtain the new INTEL_FAM6 stuff required.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Diffstat (limited to 'tools/perf/util/session.c')
| -rw-r--r-- | tools/perf/util/session.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 3b8dfe603e50..f9a320694b85 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -2095,6 +2095,7 @@ prefetch_event(char *buf, u64 head, size_t mmap_size, bool needs_swap, union perf_event *error) { union perf_event *event; + u16 event_size; /* * Ensure we have enough space remaining to read @@ -2107,15 +2108,23 @@ prefetch_event(char *buf, u64 head, size_t mmap_size, if (needs_swap) perf_event_header__bswap(&event->header); - if (head + event->header.size <= mmap_size) + event_size = event->header.size; + if (head + event_size <= mmap_size) return event; /* We're not fetching the event so swap back again */ if (needs_swap) perf_event_header__bswap(&event->header); - pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:" - " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size); + /* Check if the event fits into the next mmapped buf. */ + if (event_size <= mmap_size - head % page_size) { + /* Remap buf and fetch again. */ + return NULL; + } + + /* Invalid input. Event size should never exceed mmap_size. */ + pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" + " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size); return error; } @@ -2567,7 +2576,7 @@ int perf_session__process_events(struct perf_session *session) if (perf_data__is_pipe(session->data)) return __perf_session__process_pipe_events(session); - if (perf_data__is_dir(session->data)) + if (perf_data__is_dir(session->data) && session->data->dir.nr) return __perf_session__process_dir_events(session); return __perf_session__process_events(session); |