49 static ssize_t fd2name(int fd, char *buf, size_t bufsize)  in fd2name()  argument
55 	size = snprintf(buf1, PATH_MAX, "/proc/self/fd/%d", fd);  in fd2name()
57 		printf("snprintf(%d) failed on %m\n", fd);  in fd2name()
75 	int r, fd;  in mfd_assert_new()  local
77 	fd = sys_memfd_create(name, flags);  in mfd_assert_new()
78 	if (fd < 0) {  in mfd_assert_new()
84 	r = ftruncate(fd, sz);  in mfd_assert_new()
90 	return fd;  in mfd_assert_new()
95 	int fd = open("/proc/sys/vm/memfd_noexec", O_WRONLY | O_CLOEXEC);  in sysctl_assert_write()  local
97 	if (fd < 0) {  in sysctl_assert_write()
102 	if (write(fd, val, strlen(val)) < 0) {  in sysctl_assert_write()
110 	int fd = open("/proc/sys/vm/memfd_noexec", O_WRONLY | O_CLOEXEC);  in sysctl_fail_write()  local
112 	if (fd < 0) {  in sysctl_fail_write()
117 	if (write(fd, val, strlen(val)) >= 0) {  in sysctl_fail_write()
127 	int fd = open("/proc/sys/vm/memfd_noexec", O_RDONLY | O_CLOEXEC);  in sysctl_assert_equal()  local
129 	if (fd < 0) {  in sysctl_assert_equal()
134 	if (read(fd, buf, sizeof(buf)) < 0) {  in sysctl_assert_equal()
153 	int fd;  in mfd_assert_reopen_fd()  local
156 	sprintf(path, "/proc/self/fd/%d", fd_in);  in mfd_assert_reopen_fd()
158 	fd = open(path, O_RDWR);  in mfd_assert_reopen_fd()
159 	if (fd < 0) {  in mfd_assert_reopen_fd()
160 		printf("re-open of existing fd %d failed\n", fd_in);  in mfd_assert_reopen_fd()
164 	return fd;  in mfd_assert_reopen_fd()
180 static unsigned int mfd_assert_get_seals(int fd)  in mfd_assert_get_seals()  argument
184 	r = fcntl(fd, F_GET_SEALS);  in mfd_assert_get_seals()
186 		printf("GET_SEALS(%d) failed: %m\n", fd);  in mfd_assert_get_seals()
193 static void mfd_assert_has_seals(int fd, unsigned int seals)  in mfd_assert_has_seals()  argument
197 	fd2name(fd, buf, PATH_MAX);  in mfd_assert_has_seals()
199 	s = mfd_assert_get_seals(fd);  in mfd_assert_has_seals()
206 static void mfd_assert_add_seals(int fd, unsigned int seals)  in mfd_assert_add_seals()  argument
211 	s = mfd_assert_get_seals(fd);  in mfd_assert_add_seals()
212 	r = fcntl(fd, F_ADD_SEALS, seals);  in mfd_assert_add_seals()
214 		printf("ADD_SEALS(%d, %u -> %u) failed: %m\n", fd, s, seals);  in mfd_assert_add_seals()
219 static void mfd_fail_add_seals(int fd, unsigned int seals)  in mfd_fail_add_seals()  argument
224 	r = fcntl(fd, F_GET_SEALS);  in mfd_fail_add_seals()
230 	r = fcntl(fd, F_ADD_SEALS, seals);  in mfd_fail_add_seals()
233 				fd, s, seals);  in mfd_fail_add_seals()
238 static void mfd_assert_size(int fd, size_t size)  in mfd_assert_size()  argument
243 	r = fstat(fd, &st);  in mfd_assert_size()
245 		printf("fstat(%d) failed: %m\n", fd);  in mfd_assert_size()
254 static int mfd_assert_dup(int fd)  in mfd_assert_dup()  argument
258 	r = dup(fd);  in mfd_assert_dup()
260 		printf("dup(%d) failed: %m\n", fd);  in mfd_assert_dup()
267 static void *mfd_assert_mmap_shared(int fd)  in mfd_assert_mmap_shared()  argument
275 		 fd,  in mfd_assert_mmap_shared()
285 static void *mfd_assert_mmap_read_shared(int fd)  in mfd_assert_mmap_read_shared()  argument
293 		 fd,  in mfd_assert_mmap_read_shared()
303 static void *mfd_assert_mmap_private(int fd)  in mfd_assert_mmap_private()  argument
311 		 fd,  in mfd_assert_mmap_private()
321 static int mfd_assert_open(int fd, int flags, mode_t mode)  in mfd_assert_open()  argument
326 	sprintf(buf, "/proc/self/fd/%d", fd);  in mfd_assert_open()
336 static void mfd_fail_open(int fd, int flags, mode_t mode)  in mfd_fail_open()  argument
341 	sprintf(buf, "/proc/self/fd/%d", fd);  in mfd_fail_open()
349 static void mfd_assert_read(int fd)  in mfd_assert_read()  argument
355 	l = read(fd, buf, sizeof(buf));  in mfd_assert_read()
366 		 fd,  in mfd_assert_read()
379 		 fd,  in mfd_assert_read()
389 static void mfd_assert_read_shared(int fd)  in mfd_assert_read_shared()  argument
398 		 fd,  in mfd_assert_read_shared()
407 static void mfd_assert_fork_private_write(int fd)  in mfd_assert_fork_private_write()  argument
416 		 fd,  in mfd_assert_fork_private_write()
441 static void mfd_assert_write(int fd)  in mfd_assert_write()  argument
453 		l = write(fd, "\0\0\0\0", 4);  in mfd_assert_write()
465 		 fd,  in mfd_assert_write()
479 		 fd,  in mfd_assert_write()
494 		 fd,  in mfd_assert_write()
511 	r = fallocate(fd,  in mfd_assert_write()
521 static void mfd_fail_write(int fd)  in mfd_fail_write()  argument
528 	l = write(fd, "data", 4);  in mfd_fail_write()
539 		 fd,  in mfd_fail_write()
551 		 fd,  in mfd_fail_write()
564 		 fd,  in mfd_fail_write()
576 	r = fallocate(fd,  in mfd_fail_write()
586 static void mfd_assert_shrink(int fd)  in mfd_assert_shrink()  argument
590 	r = ftruncate(fd, mfd_def_size / 2);  in mfd_assert_shrink()
596 	mfd_assert_size(fd, mfd_def_size / 2);  in mfd_assert_shrink()
598 	fd2 = mfd_assert_open(fd,  in mfd_assert_shrink()
603 	mfd_assert_size(fd, 0);  in mfd_assert_shrink()
606 static void mfd_fail_shrink(int fd)  in mfd_fail_shrink()  argument
610 	r = ftruncate(fd, mfd_def_size / 2);  in mfd_fail_shrink()
616 	mfd_fail_open(fd,  in mfd_fail_shrink()
621 static void mfd_assert_grow(int fd)  in mfd_assert_grow()  argument
625 	r = ftruncate(fd, mfd_def_size * 2);  in mfd_assert_grow()
631 	mfd_assert_size(fd, mfd_def_size * 2);  in mfd_assert_grow()
633 	r = fallocate(fd,  in mfd_assert_grow()
642 	mfd_assert_size(fd, mfd_def_size * 4);  in mfd_assert_grow()
645 static void mfd_fail_grow(int fd)  in mfd_fail_grow()  argument
649 	r = ftruncate(fd, mfd_def_size * 2);  in mfd_fail_grow()
655 	r = fallocate(fd,  in mfd_fail_grow()
665 static void mfd_assert_grow_write(int fd)  in mfd_assert_grow_write()  argument
680 	l = pwrite(fd, buf, mfd_def_size * 8, 0);  in mfd_assert_grow_write()
686 	mfd_assert_size(fd, mfd_def_size * 8);  in mfd_assert_grow_write()
689 static void mfd_fail_grow_write(int fd)  in mfd_fail_grow_write()  argument
704 	l = pwrite(fd, buf, mfd_def_size * 8, 0);  in mfd_fail_grow_write()
711 static void mfd_assert_mode(int fd, int mode)  in mfd_assert_mode()  argument
716 	fd2name(fd, buf, PATH_MAX);  in mfd_assert_mode()
718 	if (fstat(fd, &st) < 0) {  in mfd_assert_mode()
730 static void mfd_assert_chmod(int fd, int mode)  in mfd_assert_chmod()  argument
734 	fd2name(fd, buf, PATH_MAX);  in mfd_assert_chmod()
736 	if (fchmod(fd, mode) < 0) {  in mfd_assert_chmod()
741 	mfd_assert_mode(fd, mode);  in mfd_assert_chmod()
744 static void mfd_fail_chmod(int fd, int mode)  in mfd_fail_chmod()  argument
749 	fd2name(fd, buf, PATH_MAX);  in mfd_fail_chmod()
751 	if (fstat(fd, &st) < 0) {  in mfd_fail_chmod()
756 	if (fchmod(fd, mode) == 0) {  in mfd_fail_chmod()
763 	mfd_assert_mode(fd, st.st_mode & 07777);  in mfd_fail_chmod()
840 	int fd;  in test_create()  local
857 	fd = mfd_assert_new("", 0, 0);  in test_create()
858 	close(fd);  in test_create()
871 	fd = mfd_assert_new("", 0, MFD_CLOEXEC);  in test_create()
872 	close(fd);  in test_create()
875 	fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING);  in test_create()
876 	close(fd);  in test_create()
879 	fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING | MFD_CLOEXEC);  in test_create()
880 	close(fd);  in test_create()
889 	int fd;  in test_basic()  local
893 	fd = mfd_assert_new("kern_memfd_basic",  in test_basic()
898 	mfd_assert_has_seals(fd, 0);  in test_basic()
899 	mfd_assert_add_seals(fd, F_SEAL_SHRINK |  in test_basic()
901 	mfd_assert_has_seals(fd, F_SEAL_SHRINK |  in test_basic()
905 	mfd_assert_add_seals(fd, F_SEAL_SHRINK |  in test_basic()
907 	mfd_assert_has_seals(fd, F_SEAL_SHRINK |  in test_basic()
911 	mfd_assert_add_seals(fd, F_SEAL_GROW | F_SEAL_SEAL);  in test_basic()
912 	mfd_assert_has_seals(fd, F_SEAL_SHRINK |  in test_basic()
918 	mfd_fail_add_seals(fd, F_SEAL_GROW);  in test_basic()
919 	mfd_fail_add_seals(fd, 0);  in test_basic()
921 	close(fd);  in test_basic()
924 	fd = mfd_assert_new("kern_memfd_basic",  in test_basic()
927 	mfd_assert_has_seals(fd, F_SEAL_SEAL);  in test_basic()
928 	mfd_fail_add_seals(fd, F_SEAL_SHRINK |  in test_basic()
931 	mfd_assert_has_seals(fd, F_SEAL_SEAL);  in test_basic()
932 	close(fd);  in test_basic()
941 	int fd;  in test_seal_write()  local
945 	fd = mfd_assert_new("kern_memfd_seal_write",  in test_seal_write()
948 	mfd_assert_has_seals(fd, 0);  in test_seal_write()
949 	mfd_assert_add_seals(fd, F_SEAL_WRITE);  in test_seal_write()
950 	mfd_assert_has_seals(fd, F_SEAL_WRITE);  in test_seal_write()
952 	mfd_assert_read(fd);  in test_seal_write()
953 	mfd_fail_write(fd);  in test_seal_write()
954 	mfd_assert_shrink(fd);  in test_seal_write()
955 	mfd_assert_grow(fd);  in test_seal_write()
956 	mfd_fail_grow_write(fd);  in test_seal_write()
958 	close(fd);  in test_seal_write()
967 	int fd, fd2;  in test_seal_future_write()  local
972 	fd = mfd_assert_new("kern_memfd_seal_future_write",  in test_seal_future_write()
976 	p = mfd_assert_mmap_shared(fd);  in test_seal_future_write()
978 	mfd_assert_has_seals(fd, 0);  in test_seal_future_write()
980 	mfd_assert_add_seals(fd, F_SEAL_FUTURE_WRITE);  in test_seal_future_write()
981 	mfd_assert_has_seals(fd, F_SEAL_FUTURE_WRITE);  in test_seal_future_write()
984 	mfd_assert_read(fd);  in test_seal_future_write()
985 	mfd_assert_read_shared(fd);  in test_seal_future_write()
986 	mfd_fail_write(fd);  in test_seal_future_write()
988 	fd2 = mfd_assert_reopen_fd(fd);  in test_seal_future_write()
994 	mfd_assert_fork_private_write(fd);  in test_seal_future_write()
998 	close(fd);  in test_seal_future_write()
1003 	int fd;  in test_seal_write_map_read_shared()  local
1008 	fd = mfd_assert_new("kern_memfd_seal_write_map_read",  in test_seal_write_map_read_shared()
1012 	mfd_assert_add_seals(fd, F_SEAL_WRITE);  in test_seal_write_map_read_shared()
1013 	mfd_assert_has_seals(fd, F_SEAL_WRITE);  in test_seal_write_map_read_shared()
1015 	p = mfd_assert_mmap_read_shared(fd);  in test_seal_write_map_read_shared()
1017 	mfd_assert_read(fd);  in test_seal_write_map_read_shared()
1018 	mfd_assert_read_shared(fd);  in test_seal_write_map_read_shared()
1019 	mfd_fail_write(fd);  in test_seal_write_map_read_shared()
1022 	close(fd);  in test_seal_write_map_read_shared()
1031 	int fd;  in test_seal_shrink()  local
1035 	fd = mfd_assert_new("kern_memfd_seal_shrink",  in test_seal_shrink()
1038 	mfd_assert_has_seals(fd, 0);  in test_seal_shrink()
1039 	mfd_assert_add_seals(fd, F_SEAL_SHRINK);  in test_seal_shrink()
1040 	mfd_assert_has_seals(fd, F_SEAL_SHRINK);  in test_seal_shrink()
1042 	mfd_assert_read(fd);  in test_seal_shrink()
1043 	mfd_assert_write(fd);  in test_seal_shrink()
1044 	mfd_fail_shrink(fd);  in test_seal_shrink()
1045 	mfd_assert_grow(fd);  in test_seal_shrink()
1046 	mfd_assert_grow_write(fd);  in test_seal_shrink()
1048 	close(fd);  in test_seal_shrink()
1057 	int fd;  in test_seal_grow()  local
1061 	fd = mfd_assert_new("kern_memfd_seal_grow",  in test_seal_grow()
1064 	mfd_assert_has_seals(fd, 0);  in test_seal_grow()
1065 	mfd_assert_add_seals(fd, F_SEAL_GROW);  in test_seal_grow()
1066 	mfd_assert_has_seals(fd, F_SEAL_GROW);  in test_seal_grow()
1068 	mfd_assert_read(fd);  in test_seal_grow()
1069 	mfd_assert_write(fd);  in test_seal_grow()
1070 	mfd_assert_shrink(fd);  in test_seal_grow()
1071 	mfd_fail_grow(fd);  in test_seal_grow()
1072 	mfd_fail_grow_write(fd);  in test_seal_grow()
1074 	close(fd);  in test_seal_grow()
1083 	int fd;  in test_seal_resize()  local
1087 	fd = mfd_assert_new("kern_memfd_seal_resize",  in test_seal_resize()
1090 	mfd_assert_has_seals(fd, 0);  in test_seal_resize()
1091 	mfd_assert_add_seals(fd, F_SEAL_SHRINK | F_SEAL_GROW);  in test_seal_resize()
1092 	mfd_assert_has_seals(fd, F_SEAL_SHRINK | F_SEAL_GROW);  in test_seal_resize()
1094 	mfd_assert_read(fd);  in test_seal_resize()
1095 	mfd_assert_write(fd);  in test_seal_resize()
1096 	mfd_fail_shrink(fd);  in test_seal_resize()
1097 	mfd_fail_grow(fd);  in test_seal_resize()
1098 	mfd_fail_grow_write(fd);  in test_seal_resize()
1100 	close(fd);  in test_seal_resize()
1105  * Test fd is created with exec and allow sealing.
1110 	int fd;  in test_exec_seal()  local
1115 	fd = mfd_assert_new("kern_memfd_seal_exec",  in test_exec_seal()
1119 	mfd_assert_mode(fd, 0777);  in test_exec_seal()
1120 	mfd_assert_chmod(fd, 0644);  in test_exec_seal()
1122 	mfd_assert_has_seals(fd, 0);  in test_exec_seal()
1123 	mfd_assert_add_seals(fd, F_SEAL_EXEC);  in test_exec_seal()
1124 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_exec_seal()
1126 	mfd_assert_chmod(fd, 0600);  in test_exec_seal()
1127 	mfd_fail_chmod(fd, 0777);  in test_exec_seal()
1128 	mfd_fail_chmod(fd, 0670);  in test_exec_seal()
1129 	mfd_fail_chmod(fd, 0605);  in test_exec_seal()
1130 	mfd_fail_chmod(fd, 0700);  in test_exec_seal()
1131 	mfd_fail_chmod(fd, 0100);  in test_exec_seal()
1132 	mfd_assert_chmod(fd, 0666);  in test_exec_seal()
1133 	mfd_assert_write(fd);  in test_exec_seal()
1134 	close(fd);  in test_exec_seal()
1137 	fd = mfd_assert_new("kern_memfd_seal_exec",  in test_exec_seal()
1141 	mfd_assert_mode(fd, 0777);  in test_exec_seal()
1142 	mfd_assert_chmod(fd, 0700);  in test_exec_seal()
1144 	mfd_assert_has_seals(fd, 0);  in test_exec_seal()
1145 	mfd_assert_add_seals(fd, F_SEAL_EXEC);  in test_exec_seal()
1146 	mfd_assert_has_seals(fd, F_WX_SEALS);  in test_exec_seal()
1148 	mfd_fail_chmod(fd, 0711);  in test_exec_seal()
1149 	mfd_fail_chmod(fd, 0600);  in test_exec_seal()
1150 	mfd_fail_write(fd);  in test_exec_seal()
1151 	close(fd);  in test_exec_seal()
1156  * Test fd is created with exec and not allow sealing.
1160 	int fd;  in test_exec_no_seal()  local
1165 	fd = mfd_assert_new("kern_memfd_exec_no_sealing",  in test_exec_no_seal()
1168 	mfd_assert_mode(fd, 0777);  in test_exec_no_seal()
1169 	mfd_assert_has_seals(fd, F_SEAL_SEAL);  in test_exec_no_seal()
1170 	mfd_assert_chmod(fd, 0666);  in test_exec_no_seal()
1171 	close(fd);  in test_exec_no_seal()
1179 	int fd;  in test_noexec_seal()  local
1184 	fd = mfd_assert_new("kern_memfd_noexec",  in test_noexec_seal()
1187 	mfd_assert_mode(fd, 0666);  in test_noexec_seal()
1188 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_noexec_seal()
1189 	mfd_fail_chmod(fd, 0777);  in test_noexec_seal()
1190 	close(fd);  in test_noexec_seal()
1193 	fd = mfd_assert_new("kern_memfd_noexec",  in test_noexec_seal()
1196 	mfd_assert_mode(fd, 0666);  in test_noexec_seal()
1197 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_noexec_seal()
1198 	mfd_fail_chmod(fd, 0777);  in test_noexec_seal()
1199 	close(fd);  in test_noexec_seal()
1204 	int fd;  in test_sysctl_sysctl0()  local
1208 	fd = mfd_assert_new("kern_memfd_sysctl_0_dfl",  in test_sysctl_sysctl0()
1211 	mfd_assert_mode(fd, 0777);  in test_sysctl_sysctl0()
1212 	mfd_assert_has_seals(fd, 0);  in test_sysctl_sysctl0()
1213 	mfd_assert_chmod(fd, 0644);  in test_sysctl_sysctl0()
1214 	close(fd);  in test_sysctl_sysctl0()
1225 	int fd;  in test_sysctl_sysctl1()  local
1229 	fd = mfd_assert_new("kern_memfd_sysctl_1_dfl",  in test_sysctl_sysctl1()
1232 	mfd_assert_mode(fd, 0666);  in test_sysctl_sysctl1()
1233 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_sysctl_sysctl1()
1234 	mfd_fail_chmod(fd, 0777);  in test_sysctl_sysctl1()
1235 	close(fd);  in test_sysctl_sysctl1()
1237 	fd = mfd_assert_new("kern_memfd_sysctl_1_exec",  in test_sysctl_sysctl1()
1240 	mfd_assert_mode(fd, 0777);  in test_sysctl_sysctl1()
1241 	mfd_assert_has_seals(fd, 0);  in test_sysctl_sysctl1()
1242 	mfd_assert_chmod(fd, 0644);  in test_sysctl_sysctl1()
1243 	close(fd);  in test_sysctl_sysctl1()
1245 	fd = mfd_assert_new("kern_memfd_sysctl_1_noexec",  in test_sysctl_sysctl1()
1248 	mfd_assert_mode(fd, 0666);  in test_sysctl_sysctl1()
1249 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_sysctl_sysctl1()
1250 	mfd_fail_chmod(fd, 0777);  in test_sysctl_sysctl1()
1251 	close(fd);  in test_sysctl_sysctl1()
1262 	int fd;  in test_sysctl_sysctl2()  local
1266 	fd = mfd_assert_new("kern_memfd_sysctl_2_dfl",  in test_sysctl_sysctl2()
1269 	mfd_assert_mode(fd, 0666);  in test_sysctl_sysctl2()
1270 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_sysctl_sysctl2()
1271 	mfd_fail_chmod(fd, 0777);  in test_sysctl_sysctl2()
1272 	close(fd);  in test_sysctl_sysctl2()
1277 	fd = mfd_assert_new("kern_memfd_sysctl_2_noexec",  in test_sysctl_sysctl2()
1280 	mfd_assert_mode(fd, 0666);  in test_sysctl_sysctl2()
1281 	mfd_assert_has_seals(fd, F_SEAL_EXEC);  in test_sysctl_sysctl2()
1282 	mfd_fail_chmod(fd, 0777);  in test_sysctl_sysctl2()
1283 	close(fd);  in test_sysctl_sysctl2()
1460 	int fd, fd2;  in test_share_dup()  local
1464 	fd = mfd_assert_new("kern_memfd_share_dup",  in test_share_dup()
1467 	mfd_assert_has_seals(fd, 0);  in test_share_dup()
1469 	fd2 = mfd_assert_dup(fd);  in test_share_dup()
1472 	mfd_assert_add_seals(fd, F_SEAL_WRITE);  in test_share_dup()
1473 	mfd_assert_has_seals(fd, F_SEAL_WRITE);  in test_share_dup()
1477 	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);  in test_share_dup()
1480 	mfd_assert_add_seals(fd, F_SEAL_SEAL);  in test_share_dup()
1481 	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK | F_SEAL_SEAL);  in test_share_dup()
1484 	mfd_fail_add_seals(fd, F_SEAL_GROW);  in test_share_dup()
1486 	mfd_fail_add_seals(fd, F_SEAL_SEAL);  in test_share_dup()
1491 	mfd_fail_add_seals(fd, F_SEAL_GROW);  in test_share_dup()
1492 	close(fd);  in test_share_dup()
1501 	int fd;  in test_share_mmap()  local
1506 	fd = mfd_assert_new("kern_memfd_share_mmap",  in test_share_mmap()
1509 	mfd_assert_has_seals(fd, 0);  in test_share_mmap()
1512 	p = mfd_assert_mmap_shared(fd);  in test_share_mmap()
1513 	mfd_fail_add_seals(fd, F_SEAL_WRITE);  in test_share_mmap()
1514 	mfd_assert_has_seals(fd, 0);  in test_share_mmap()
1515 	mfd_assert_add_seals(fd, F_SEAL_SHRINK);  in test_share_mmap()
1516 	mfd_assert_has_seals(fd, F_SEAL_SHRINK);  in test_share_mmap()
1520 	p = mfd_assert_mmap_private(fd);  in test_share_mmap()
1521 	mfd_assert_add_seals(fd, F_SEAL_WRITE);  in test_share_mmap()
1522 	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);  in test_share_mmap()
1525 	close(fd);  in test_share_mmap()
1529  * Test sealing with open(/proc/self/fd/%d)
1536 	int fd, fd2;  in test_share_open()  local
1540 	fd = mfd_assert_new("kern_memfd_share_open",  in test_share_open()
1543 	mfd_assert_has_seals(fd, 0);  in test_share_open()
1545 	fd2 = mfd_assert_open(fd, O_RDWR, 0);  in test_share_open()
1546 	mfd_assert_add_seals(fd, F_SEAL_WRITE);  in test_share_open()
1547 	mfd_assert_has_seals(fd, F_SEAL_WRITE);  in test_share_open()
1551 	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);  in test_share_open()
1554 	close(fd);  in test_share_open()
1555 	fd = mfd_assert_open(fd2, O_RDONLY, 0);  in test_share_open()
1557 	mfd_fail_add_seals(fd, F_SEAL_SEAL);  in test_share_open()
1558 	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);  in test_share_open()
1562 	fd2 = mfd_assert_open(fd, O_RDWR, 0);  in test_share_open()
1565 	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK | F_SEAL_SEAL);  in test_share_open()
1569 	close(fd);  in test_share_open()
1578 	int fd;  in test_share_fork()  local
1583 	fd = mfd_assert_new("kern_memfd_share_fork",  in test_share_fork()
1586 	mfd_assert_has_seals(fd, 0);  in test_share_fork()
1589 	mfd_assert_add_seals(fd, F_SEAL_SEAL);  in test_share_fork()
1590 	mfd_assert_has_seals(fd, F_SEAL_SEAL);  in test_share_fork()
1592 	mfd_fail_add_seals(fd, F_SEAL_WRITE);  in test_share_fork()
1593 	mfd_assert_has_seals(fd, F_SEAL_SEAL);  in test_share_fork()
1597 	mfd_fail_add_seals(fd, F_SEAL_WRITE);  in test_share_fork()
1598 	mfd_assert_has_seals(fd, F_SEAL_SEAL);  in test_share_fork()
1600 	close(fd);  in test_share_fork()