Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <sys/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <sys/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <sys/resource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #ifndef MCL_ONFAULT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define MCL_ONFAULT (MCL_FUTURE << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static int test_limit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	struct rlimit lims;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	void *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		perror("getrlimit");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	if (mlockall(MCL_ONFAULT | MCL_FUTURE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		perror("mlockall");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	if (map != MAP_FAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		printf("mmap should have failed, but didn't\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		munmap(map, 2 * lims.rlim_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	munlockall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int main(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	ret += test_limit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }