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perf record: Fix segfault with --no-mmap-pages

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Adrian reported a segfault when using --no-out-pages:

$ tools/perf/perf record -vv --no-out-pages uname
Segmentation fault (core dumped)

The same occurs with --no-mmap-pages. Fix by checking that str is
non-NULL before parsing it.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1384267617-3446-2-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2013-11-12 07:46:53 -07:00 committed by Arnaldo Carvalho de Melo
parent fd2eabaf16
commit 8973504be7
1 changed files with 3 additions and 0 deletions
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3
tools/perf/util/evlist.c
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@ -719,6 +719,9 @@ int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
{ .tag = 0 },
};
if (str == NULL)
return -1;
val = parse_tag_value(str, tags);
if (val != (unsigned long) -1) {
/* we got file size value */