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| author | Adrian Hunter <adrian.hunter@intel.com> | 2013-10-22 10:34:17 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-10-23 10:59:09 -0300 |
| commit | 56921becdd1eb0720603fc2e6e4c7f518196d917 (patch) | |
| tree | 9b0675cebf93d88c9ad71b177171c47d14be1089 /tools/perf/util/util.c | |
| parent | 89c97d936e76b064a52ee056602b2a62b3f1ef70 (diff) | |
| download | linux-56921becdd1eb0720603fc2e6e4c7f518196d917.tar.gz linux-56921becdd1eb0720603fc2e6e4c7f518196d917.tar.bz2 linux-56921becdd1eb0720603fc2e6e4c7f518196d917.zip | |
perf tools: Do not accept parse_tag_value() overflow
parse_tag_value() accepts an "unsigned long" and multiplies it according
to a tag character. Do not accept the value if the multiplication
overflows.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1382427258-17495-14-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.c')
| -rw-r--r-- | tools/perf/util/util.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index c25e57b3acb2..28a0a89c1f73 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -386,6 +386,8 @@ unsigned long parse_tag_value(const char *str, struct parse_tag *tags) if (s != endptr) break; + if (value > ULONG_MAX / i->mult) + break; value *= i->mult; return value; } |