From 8e303f20f4b3611615118a22a737fd2dc7c4ef81 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Thu, 29 Sep 2011 17:05:08 +0200 Subject: [PATCH] perf tools: Fix raw sample reading Wrong pointer is being passed for raw data sanity checking, when parsing sample event. This ends up with invalid event and perf record being stuck in __perf_session__process_events function during processing build IDs (process_buildids function). Following command hangs up in my setup: ./perf record -e raw_syscalls:sys_enter ls The fix is to use proper pointer to the raw data instead of the 'u' union. Reviewed-by: David Ahern Cc: David Ahern Cc: Eric Dumazet Cc: Ingo Molnar Cc: Neil Horman Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1317308709-9474-2-git-send-email-jolsa@redhat.com Signed-off-by: Jiri Olsa Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evsel.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index c5748c52318f..e389815078d3 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -449,6 +449,8 @@ int perf_event__parse_sample(const union perf_event *event, u64 type, } if (type & PERF_SAMPLE_RAW) { + const u64 *pdata; + u.val64 = *array; if (WARN_ONCE(swapped, "Endianness of raw data not corrected!\n")) { @@ -462,11 +464,12 @@ int perf_event__parse_sample(const union perf_event *event, u64 type, return -EFAULT; data->raw_size = u.val32[0]; + pdata = (void *) array + sizeof(u32); - if (sample_overlap(event, &u.val32[1], data->raw_size)) + if (sample_overlap(event, pdata, data->raw_size)) return -EFAULT; - data->raw_data = &u.val32[1]; + data->raw_data = (void *) pdata; } return 0; -- 2.39.5