getsetsockopt() calls getsockopt() with optlen == 1, but then checks

the resulting int. It is ok on little endian, but not on big endian.

Fix by checking char instead.

Fixes: 8a027dc ("selftests/bpf: add sockopt test that exercises sk helpers")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tools/testing/selftests/bpf/prog_tests/sockopt_sk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Author: iii-i

tools/testing/selftests/bpf/prog_tests/sockopt_sk.c

@@ -45,7 +45,7 @@ static int getsetsockopt(void)
 		goto err;
 	}
 
-	if (*(int *)big_buf != 0x08) {
+	if (*big_buf != 0x08) {
 		log_err("Unexpected getsockopt(IP_TOS) optval 0x%x != 0x08",
 			*(int *)big_buf);
 		goto err;