From: Jiri Olsa jolsa@kernel.org
[ Upstream commit 79b2fe5e756163897175a8f57d66b26cd9befd59 ]
After Song Liu's segfault fix for pipe mode, Arnaldo reported following error:
# perf record -o - | perf script 0x514 [0x1ac]: failed to process type: 80
It's caused by wrong buffer size setup in feature processing, which makes cpu topology feature fail, because it's using buffer size to recognize its header version.
Reported-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Jiri Olsa jolsa@kernel.org Tested-by: Arnaldo Carvalho de Melo acme@redhat.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: David Carrillo-Cisneros davidcc@google.com Cc: Kan Liang kan.liang@linux.intel.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: Song Liu songliubraving@fb.com Fixes: e9def1b2e74e ("perf tools: Add feature header record to pipe-mode") Link: http://lkml.kernel.org/r/20190715140426.32509-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/util/header.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 26437143c9406..c892a28e7b048 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -3081,7 +3081,7 @@ int perf_event__process_feature(struct perf_tool *tool, return 0;
ff.buf = (void *)fe->data; - ff.size = event->header.size - sizeof(event->header); + ff.size = event->header.size - sizeof(*fe); ff.ph = &session->header;
if (feat_ops[feat].process(&ff, NULL))