perf python: Handle Py_None for thread and cpu maps

The python stubs allow passing None for threads and cpus to the
perf.parse_events() and perf.parse_metrics() bindings. However, PyArg_ParseTuple
parses None into a Py_None object, which is not a NULL pointer.
Because the C code lacked an explicit check for Py_None, it would cast
Py_None to a pyrf_thread_map/pyrf_cpu_map struct pointer and dereference it,
causing a memory corruption crash.

Fix this pre-existing issue by explicitly checking for Py_None alongside NULL
in pyrf__parse_events, pyrf__parse_metrics, and pyrf_evsel__open.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alice Rogers <alice.mei.rogers@gmail.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

0 files changed, 0 insertions, 0 deletions