tools: Fix incorrect calculation of object size by sizeof

What we need to calculate is the size of the object, not the size of the
pointer.

Fixed: 51cfe7a ("perf python: Avoid 2 leak sanitizer issues")
Signed-off-by: Li Dong <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

Author: lidongjsx

tools/perf/util/scripting-engines/trace-event-python.c

@@ -771,12 +771,12 @@ static void set_regs_in_dict(PyObject *dict,
 	int size = __sw_hweight64(attr->sample_regs_intr) * 28;
 	char *bf = malloc(size);
 
-	regs_map(&sample->intr_regs, attr->sample_regs_intr, arch, bf, sizeof(bf));
+	regs_map(&sample->intr_regs, attr->sample_regs_intr, arch, bf, size);
 
 	pydict_set_item_string_decref(dict, "iregs",
 			_PyUnicode_FromString(bf));
 
-	regs_map(&sample->user_regs, attr->sample_regs_user, arch, bf, sizeof(bf));
+	regs_map(&sample->user_regs, attr->sample_regs_user, arch, bf, size);
 
 	pydict_set_item_string_decref(dict, "uregs",
 			_PyUnicode_FromString(bf));