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) #define _GNU_SOURCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <sys/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <sys/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <sys/resource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include "mlock2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "../kselftest.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) struct vm_boundaries {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	unsigned long start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	unsigned long end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static int get_vm_area(unsigned long addr, struct vm_boundaries *area)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	FILE *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	char line[1024] = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	char *end_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	char *stop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	unsigned long start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	unsigned long end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	if (!area)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	file = fopen("/proc/self/maps", "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	if (!file) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		perror("fopen");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		return ret;
^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) 	memset(area, 0, sizeof(struct vm_boundaries));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	while(fgets(line, 1024, file)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		end_addr = strchr(line, '-');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		if (!end_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			printf("cannot parse /proc/self/maps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		*end_addr = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		end_addr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		stop = strchr(end_addr, ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		if (!stop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			printf("cannot parse /proc/self/maps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		stop = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		sscanf(line, "%lx", &start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		sscanf(end_addr, "%lx", &end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		if (start <= addr && end > addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			area->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 			area->end = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	fclose(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #define VMFLAGS "VmFlags:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static bool is_vmflag_set(unsigned long addr, const char *vmflag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	char *line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	char *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	size_t size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	bool ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	FILE *smaps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	smaps = seek_to_smaps_entry(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (!smaps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		printf("Unable to parse /proc/self/smaps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	while (getline(&line, &size, smaps) > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		if (!strstr(line, VMFLAGS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		flags = line + strlen(VMFLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		ret = (strstr(flags, vmflag) != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	fclose(smaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define SIZE "Size:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define RSS  "Rss:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define LOCKED "lo"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static unsigned long get_value_for_name(unsigned long addr, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	char *line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	size_t size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	char *value_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	FILE *smaps = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	unsigned long value = -1UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	smaps = seek_to_smaps_entry(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (!smaps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		printf("Unable to parse /proc/self/smaps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	while (getline(&line, &size, smaps) > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		if (!strstr(line, name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		value_ptr = line + strlen(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		if (sscanf(value_ptr, "%lu kB", &value) < 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			printf("Unable to parse smaps entry for Size\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (smaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		fclose(smaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static bool is_vma_lock_on_fault(unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	bool locked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	unsigned long vma_size, vma_rss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	locked = is_vmflag_set(addr, LOCKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	if (!locked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	vma_size = get_value_for_name(addr, SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	vma_rss = get_value_for_name(addr, RSS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	/* only one page is faulted in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	return (vma_rss < vma_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #define PRESENT_BIT     0x8000000000000000ULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #define PFN_MASK        0x007FFFFFFFFFFFFFULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #define UNEVICTABLE_BIT (1UL << 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static int lock_check(unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	bool locked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	unsigned long vma_size, vma_rss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	locked = is_vmflag_set(addr, LOCKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (!locked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	vma_size = get_value_for_name(addr, SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	vma_rss = get_value_for_name(addr, RSS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	return (vma_rss == vma_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static int unlock_lock_check(char *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	if (is_vmflag_set((unsigned long)map, LOCKED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		printf("VMA flag %s is present on page 1 after unlock\n", LOCKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static int test_mlock_lock()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	char *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	unsigned long page_size = getpagesize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	map = mmap(NULL, 2 * page_size, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		perror("test_mlock_locked mmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (mlock2_(map, 2 * page_size, 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		if (errno == ENOSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			printf("Cannot call new mlock family, skipping test\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			_exit(KSFT_SKIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		perror("mlock2(0)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (!lock_check((unsigned long)map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	/* Now unlock and recheck attributes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (munlock(map, 2 * page_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		perror("munlock()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	ret = unlock_lock_check(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) unmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	munmap(map, 2 * page_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static int onfault_check(char *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	*map = 'a';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (!is_vma_lock_on_fault((unsigned long)map)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		printf("VMA is not marked for lock on fault\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static int unlock_onfault_check(char *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	unsigned long page_size = getpagesize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	if (is_vma_lock_on_fault((unsigned long)map) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	    is_vma_lock_on_fault((unsigned long)map + page_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		printf("VMA is still lock on fault after unlock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int test_mlock_onfault()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	char *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	unsigned long page_size = getpagesize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	map = mmap(NULL, 2 * page_size, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		perror("test_mlock_locked mmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (mlock2_(map, 2 * page_size, MLOCK_ONFAULT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		if (errno == ENOSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			printf("Cannot call new mlock family, skipping test\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			_exit(KSFT_SKIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		perror("mlock2(MLOCK_ONFAULT)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (onfault_check(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	/* Now unlock and recheck attributes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	if (munlock(map, 2 * page_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		if (errno == ENOSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 			printf("Cannot call new mlock family, skipping test\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			_exit(KSFT_SKIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		perror("munlock()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	ret = unlock_onfault_check(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) unmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	munmap(map, 2 * page_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static int test_lock_onfault_of_present()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	char *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	unsigned long page_size = getpagesize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	map = mmap(NULL, 2 * page_size, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	if (map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		perror("test_mlock_locked mmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	*map = 'a';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	if (mlock2_(map, 2 * page_size, MLOCK_ONFAULT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		if (errno == ENOSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 			printf("Cannot call new mlock family, skipping test\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 			_exit(KSFT_SKIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		perror("mlock2(MLOCK_ONFAULT)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (!is_vma_lock_on_fault((unsigned long)map) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	    !is_vma_lock_on_fault((unsigned long)map + page_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		printf("VMA with present pages is not marked lock on fault\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) unmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	munmap(map, 2 * page_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static int test_munlockall()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	char *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	unsigned long page_size = getpagesize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	map = mmap(NULL, 2 * page_size, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	if (map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		perror("test_munlockall mmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (mlockall(MCL_CURRENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		perror("mlockall(MCL_CURRENT)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	if (!lock_check((unsigned long)map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	if (munlockall()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		perror("munlockall()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	if (unlock_lock_check(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	munmap(map, 2 * page_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	map = mmap(NULL, 2 * page_size, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	if (map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		perror("test_munlockall second mmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	if (mlockall(MCL_CURRENT | MCL_ONFAULT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 		perror("mlockall(MCL_CURRENT | MCL_ONFAULT)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	if (onfault_check(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	if (munlockall()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		perror("munlockall()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	if (unlock_onfault_check(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		perror("mlockall(MCL_CURRENT | MCL_FUTURE)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	if (!lock_check((unsigned long)map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	if (munlockall()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		perror("munlockall()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		goto unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	ret = unlock_lock_check(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) unmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	munmap(map, 2 * page_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	munlockall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static int test_vma_management(bool call_mlock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	void *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	unsigned long page_size = getpagesize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	struct vm_boundaries page1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	struct vm_boundaries page2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	struct vm_boundaries page3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	map = mmap(NULL, 3 * page_size, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		perror("mmap()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	if (call_mlock && mlock2_(map, 3 * page_size, MLOCK_ONFAULT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		if (errno == ENOSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 			printf("Cannot call new mlock family, skipping test\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 			_exit(KSFT_SKIP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 		perror("mlock(ONFAULT)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	if (get_vm_area((unsigned long)map, &page1) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	    get_vm_area((unsigned long)map + page_size, &page2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	    get_vm_area((unsigned long)map + page_size * 2, &page3)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 		printf("couldn't find mapping in /proc/self/maps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	 * Before we unlock a portion, we need to that all three pages are in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	 * the same VMA.  If they are not we abort this test (Note that this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	 * not a failure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	if (page1.start != page2.start || page2.start != page3.start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		printf("VMAs are not merged to start, aborting test\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	if (munlock(map + page_size, page_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		perror("munlock()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	if (get_vm_area((unsigned long)map, &page1) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	    get_vm_area((unsigned long)map + page_size, &page2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	    get_vm_area((unsigned long)map + page_size * 2, &page3)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 		printf("couldn't find mapping in /proc/self/maps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	/* All three VMAs should be different */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	if (page1.start == page2.start || page2.start == page3.start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 		printf("failed to split VMA for munlock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	/* Now unlock the first and third page and check the VMAs again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	if (munlock(map, page_size * 3)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 		perror("munlock()");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	if (get_vm_area((unsigned long)map, &page1) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	    get_vm_area((unsigned long)map + page_size, &page2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 	    get_vm_area((unsigned long)map + page_size * 2, &page3)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 		printf("couldn't find mapping in /proc/self/maps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	/* Now all three VMAs should be the same */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	if (page1.start != page2.start || page2.start != page3.start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 		printf("failed to merge VMAs after munlock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	munmap(map, 3 * page_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) static int test_mlockall(int (test_function)(bool call_mlock))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 	if (mlockall(MCL_CURRENT | MCL_ONFAULT | MCL_FUTURE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) 		perror("mlockall");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 	ret = test_function(false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 	munlockall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) int main(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 	ret += test_mlock_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	ret += test_mlock_onfault();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 	ret += test_munlockall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 	ret += test_lock_onfault_of_present();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 	ret += test_vma_management(true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 	ret += test_mlockall(test_vma_management);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }