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| author | Leo Yan <leo.yan@arm.com> | 2025-08-08 14:24:40 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2025-09-19 12:44:10 -0300 |
| commit | c17dda8013495d8132c976cbf349be9949d0fbd1 (patch) | |
| tree | 23de7133d066b31c1c69eac7e81f8b3826b895da /tools/perf/util | |
| parent | perf bench mem: Add mmap() workloads (diff) | |
| download | linux-c17dda8013495d8132c976cbf349be9949d0fbd1.tar.gz linux-c17dda8013495d8132c976cbf349be9949d0fbd1.zip | |
perf session: Fix handling when buffer exceeds 2 GiB
If a user specifies an AUX buffer larger than 2 GiB, the returned size
may exceed 0x80000000. Since the err variable is defined as a signed
32-bit integer, such a value overflows and becomes negative.
As a result, the perf record command reports an error:
0x146e8 [0x30]: failed to process type: 71 [Unknown error 183711232]
Change the type of the err variable to a signed 64-bit integer to
accommodate large buffer sizes correctly.
Fixes: d5652d865ea734a1 ("perf session: Add ability to skip 4GiB or more")
Reported-by: Tamas Zsoldos <tamas.zsoldos@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20250808-perf_fix_big_buffer_size-v1-1-45f45444a9a4@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/session.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 26ae078278cd..09af486c83e4 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1402,7 +1402,7 @@ static s64 perf_session__process_user_event(struct perf_session *session, const struct perf_tool *tool = session->tool; struct perf_sample sample; int fd = perf_data__fd(session->data); - int err; + s64 err; perf_sample__init(&sample, /*all=*/true); if ((event->header.type != PERF_RECORD_COMPRESSED && |