selftests/bpf: Fix parse_int() on 32-bit

Several failures running test_progs relate to parsing int stings:

  tester_init:PASS:tester_log_buf 0 nsec
  process_subtest:PASS:obj_open_mem 0 nsec
  process_subtest:PASS:specs_alloc 0 nsec
  parse_int:FAIL:281 failed to parse __retval from '0xFFFFff23'
  process_subtest:FAIL:1153 Can't parse test spec for program 'mov32sx_s16'
  torvalds#532     verifier_movsx:FAIL

These occur because strtol() used by parse_int() will overflow on 32-bit
with typical values like '0xd495cdc0'. Fix by using strtoll() instead.

Fixes: 19a8e06 ("selftests/bpf: Tests execution support for test_loader.c")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>

Author: guidosarducci

tools/testing/selftests/bpf/test_loader.c

@@ -273,13 +273,13 @@ static int push_disasm_msg(const char *regex_str, bool *on_next_line, struct exp
 static int parse_int(const char *str, int *val, const char *name)
 {
 	char *end;
-	long tmp;
+	long long tmp;
 
 	errno = 0;
 	if (str_has_pfx(str, "0x"))
-		tmp = strtol(str + 2, &end, 16);
+		tmp = strtoll(str + 2, &end, 16);
 	else
-		tmp = strtol(str, &end, 10);
+		tmp = strtoll(str, &end, 10);
 	if (errno || end[0] != '\0') {
 		PRINT_FAIL("failed to parse %s from '%s'\n", name, str);
 		return -EINVAL;