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diff --git a/tests/sys/capsicum/linux.cc b/tests/sys/capsicum/linux.cc
deleted file mode 100644
--- a/tests/sys/capsicum/linux.cc
+++ /dev/null
@@ -1,1500 +0,0 @@
-// Tests of Linux-specific functionality
-#ifdef __linux__
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/timerfd.h>
-#include <sys/signalfd.h>
-#include <sys/eventfd.h>
-#include <sys/epoll.h>
-#include <sys/inotify.h>
-#include <sys/fanotify.h>
-#include <sys/mman.h>
-#include <sys/capability.h> // Requires e.g. libcap-dev package for POSIX.1e capabilities headers
-#include <linux/aio_abi.h>
-#include <linux/filter.h>
-#include <linux/seccomp.h>
-#include <linux/version.h>
-#include <poll.h>
-#include <sched.h>
-#include <signal.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <string>
-
-#include "capsicum.h"
-#include "syscalls.h"
-#include "capsicum-test.h"
-
-TEST(Linux, TimerFD) {
- int fd = timerfd_create(CLOCK_MONOTONIC, 0);
-
- cap_rights_t r_ro;
- cap_rights_init(&r_ro, CAP_READ);
- cap_rights_t r_wo;
- cap_rights_init(&r_wo, CAP_WRITE);
- cap_rights_t r_rw;
- cap_rights_init(&r_rw, CAP_READ, CAP_WRITE);
- cap_rights_t r_rwpoll;
- cap_rights_init(&r_rwpoll, CAP_READ, CAP_WRITE, CAP_EVENT);
-
- int cap_fd_ro = dup(fd);
- EXPECT_OK(cap_fd_ro);
- EXPECT_OK(cap_rights_limit(cap_fd_ro, &r_ro));
- int cap_fd_wo = dup(fd);
- EXPECT_OK(cap_fd_wo);
- EXPECT_OK(cap_rights_limit(cap_fd_wo, &r_wo));
- int cap_fd_rw = dup(fd);
- EXPECT_OK(cap_fd_rw);
- EXPECT_OK(cap_rights_limit(cap_fd_rw, &r_rw));
- int cap_fd_all = dup(fd);
- EXPECT_OK(cap_fd_all);
- EXPECT_OK(cap_rights_limit(cap_fd_all, &r_rwpoll));
-
- struct itimerspec old_ispec;
- struct itimerspec ispec;
- ispec.it_interval.tv_sec = 0;
- ispec.it_interval.tv_nsec = 0;
- ispec.it_value.tv_sec = 0;
- ispec.it_value.tv_nsec = 100000000; // 100ms
- EXPECT_NOTCAPABLE(timerfd_settime(cap_fd_ro, 0, &ispec, NULL));
- EXPECT_NOTCAPABLE(timerfd_settime(cap_fd_wo, 0, &ispec, &old_ispec));
- EXPECT_OK(timerfd_settime(cap_fd_wo, 0, &ispec, NULL));
- EXPECT_OK(timerfd_settime(cap_fd_rw, 0, &ispec, NULL));
- EXPECT_OK(timerfd_settime(cap_fd_all, 0, &ispec, NULL));
-
- EXPECT_NOTCAPABLE(timerfd_gettime(cap_fd_wo, &old_ispec));
- EXPECT_OK(timerfd_gettime(cap_fd_ro, &old_ispec));
- EXPECT_OK(timerfd_gettime(cap_fd_rw, &old_ispec));
- EXPECT_OK(timerfd_gettime(cap_fd_all, &old_ispec));
-
- // To be able to poll() for the timer pop, still need CAP_EVENT.
- struct pollfd poll_fd;
- for (int ii = 0; ii < 3; ii++) {
- poll_fd.revents = 0;
- poll_fd.events = POLLIN;
- switch (ii) {
- case 0: poll_fd.fd = cap_fd_ro; break;
- case 1: poll_fd.fd = cap_fd_wo; break;
- case 2: poll_fd.fd = cap_fd_rw; break;
- }
- // Poll immediately returns with POLLNVAL
- EXPECT_OK(poll(&poll_fd, 1, 400));
- EXPECT_EQ(0, (poll_fd.revents & POLLIN));
- EXPECT_NE(0, (poll_fd.revents & POLLNVAL));
- }
-
- poll_fd.fd = cap_fd_all;
- EXPECT_OK(poll(&poll_fd, 1, 400));
- EXPECT_NE(0, (poll_fd.revents & POLLIN));
- EXPECT_EQ(0, (poll_fd.revents & POLLNVAL));
-
- EXPECT_OK(timerfd_gettime(cap_fd_all, &old_ispec));
- EXPECT_EQ(0, old_ispec.it_value.tv_sec);
- EXPECT_EQ(0, old_ispec.it_value.tv_nsec);
- EXPECT_EQ(0, old_ispec.it_interval.tv_sec);
- EXPECT_EQ(0, old_ispec.it_interval.tv_nsec);
-
- close(cap_fd_all);
- close(cap_fd_rw);
- close(cap_fd_wo);
- close(cap_fd_ro);
- close(fd);
-}
-
-FORK_TEST(Linux, SignalFDIfSingleThreaded) {
- if (force_mt) {
- GTEST_SKIP() << "multi-threaded run clashes with signals";
- }
- pid_t me = getpid();
- sigset_t mask;
- sigemptyset(&mask);
- sigaddset(&mask, SIGUSR1);
-
- // Block signals before registering against a new signal FD.
- EXPECT_OK(sigprocmask(SIG_BLOCK, &mask, NULL));
- int fd = signalfd(-1, &mask, 0);
- EXPECT_OK(fd);
-
- cap_rights_t r_rs;
- cap_rights_init(&r_rs, CAP_READ, CAP_SEEK);
- cap_rights_t r_ws;
- cap_rights_init(&r_ws, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_sig;
- cap_rights_init(&r_sig, CAP_FSIGNAL);
- cap_rights_t r_rssig;
- cap_rights_init(&r_rssig, CAP_FSIGNAL, CAP_READ, CAP_SEEK);
- cap_rights_t r_rssig_poll;
- cap_rights_init(&r_rssig_poll, CAP_FSIGNAL, CAP_READ, CAP_SEEK, CAP_EVENT);
-
- // Various capability variants.
- int cap_fd_none = dup(fd);
- EXPECT_OK(cap_fd_none);
- EXPECT_OK(cap_rights_limit(cap_fd_none, &r_ws));
- int cap_fd_read = dup(fd);
- EXPECT_OK(cap_fd_read);
- EXPECT_OK(cap_rights_limit(cap_fd_read, &r_rs));
- int cap_fd_sig = dup(fd);
- EXPECT_OK(cap_fd_sig);
- EXPECT_OK(cap_rights_limit(cap_fd_sig, &r_sig));
- int cap_fd_sig_read = dup(fd);
- EXPECT_OK(cap_fd_sig_read);
- EXPECT_OK(cap_rights_limit(cap_fd_sig_read, &r_rssig));
- int cap_fd_all = dup(fd);
- EXPECT_OK(cap_fd_all);
- EXPECT_OK(cap_rights_limit(cap_fd_all, &r_rssig_poll));
-
- struct signalfd_siginfo fdsi;
-
- // Need CAP_READ to read the signal information
- kill(me, SIGUSR1);
- EXPECT_NOTCAPABLE(read(cap_fd_none, &fdsi, sizeof(struct signalfd_siginfo)));
- EXPECT_NOTCAPABLE(read(cap_fd_sig, &fdsi, sizeof(struct signalfd_siginfo)));
- int len = read(cap_fd_read, &fdsi, sizeof(struct signalfd_siginfo));
- EXPECT_OK(len);
- EXPECT_EQ(sizeof(struct signalfd_siginfo), (size_t)len);
- EXPECT_EQ(SIGUSR1, (int)fdsi.ssi_signo);
-
- // Need CAP_FSIGNAL to modify the signal mask.
- sigemptyset(&mask);
- sigaddset(&mask, SIGUSR1);
- sigaddset(&mask, SIGUSR2);
- EXPECT_OK(sigprocmask(SIG_BLOCK, &mask, NULL));
- EXPECT_NOTCAPABLE(signalfd(cap_fd_none, &mask, 0));
- EXPECT_NOTCAPABLE(signalfd(cap_fd_read, &mask, 0));
- EXPECT_EQ(cap_fd_sig, signalfd(cap_fd_sig, &mask, 0));
-
- // Need CAP_EVENT to get notification of a signal in poll(2).
- kill(me, SIGUSR2);
-
- struct pollfd poll_fd;
- poll_fd.revents = 0;
- poll_fd.events = POLLIN;
- poll_fd.fd = cap_fd_sig_read;
- EXPECT_OK(poll(&poll_fd, 1, 400));
- EXPECT_EQ(0, (poll_fd.revents & POLLIN));
- EXPECT_NE(0, (poll_fd.revents & POLLNVAL));
-
- poll_fd.fd = cap_fd_all;
- EXPECT_OK(poll(&poll_fd, 1, 400));
- EXPECT_NE(0, (poll_fd.revents & POLLIN));
- EXPECT_EQ(0, (poll_fd.revents & POLLNVAL));
-}
-
-TEST(Linux, EventFD) {
- int fd = eventfd(0, 0);
- EXPECT_OK(fd);
-
- cap_rights_t r_rs;
- cap_rights_init(&r_rs, CAP_READ, CAP_SEEK);
- cap_rights_t r_ws;
- cap_rights_init(&r_ws, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rws;
- cap_rights_init(&r_rws, CAP_READ, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rwspoll;
- cap_rights_init(&r_rwspoll, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_EVENT);
-
- int cap_ro = dup(fd);
- EXPECT_OK(cap_ro);
- EXPECT_OK(cap_rights_limit(cap_ro, &r_rs));
- int cap_wo = dup(fd);
- EXPECT_OK(cap_wo);
- EXPECT_OK(cap_rights_limit(cap_wo, &r_ws));
- int cap_rw = dup(fd);
- EXPECT_OK(cap_rw);
- EXPECT_OK(cap_rights_limit(cap_rw, &r_rws));
- int cap_all = dup(fd);
- EXPECT_OK(cap_all);
- EXPECT_OK(cap_rights_limit(cap_all, &r_rwspoll));
-
- pid_t child = fork();
- if (child == 0) {
- // Child: write counter to eventfd
- uint64_t u = 42;
- EXPECT_NOTCAPABLE(write(cap_ro, &u, sizeof(u)));
- EXPECT_OK(write(cap_wo, &u, sizeof(u)));
- exit(HasFailure());
- }
-
- sleep(1); // Allow child to write
-
- struct pollfd poll_fd;
- poll_fd.revents = 0;
- poll_fd.events = POLLIN;
- poll_fd.fd = cap_rw;
- EXPECT_OK(poll(&poll_fd, 1, 400));
- EXPECT_EQ(0, (poll_fd.revents & POLLIN));
- EXPECT_NE(0, (poll_fd.revents & POLLNVAL));
-
- poll_fd.fd = cap_all;
- EXPECT_OK(poll(&poll_fd, 1, 400));
- EXPECT_NE(0, (poll_fd.revents & POLLIN));
- EXPECT_EQ(0, (poll_fd.revents & POLLNVAL));
-
- uint64_t u;
- EXPECT_NOTCAPABLE(read(cap_wo, &u, sizeof(u)));
- EXPECT_OK(read(cap_ro, &u, sizeof(u)));
- EXPECT_EQ(42, (int)u);
-
- // Wait for the child.
- int status;
- EXPECT_EQ(child, waitpid(child, &status, 0));
- int rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
-
- close(cap_all);
- close(cap_rw);
- close(cap_wo);
- close(cap_ro);
- close(fd);
-}
-
-FORK_TEST(Linux, epoll) {
- int sock_fds[2];
- EXPECT_OK(socketpair(AF_UNIX, SOCK_STREAM, 0, sock_fds));
- // Queue some data.
- char buffer[4] = {1, 2, 3, 4};
- EXPECT_OK(write(sock_fds[1], buffer, sizeof(buffer)));
-
- EXPECT_OK(cap_enter()); // Enter capability mode.
-
- int epoll_fd = epoll_create(1);
- EXPECT_OK(epoll_fd);
-
- cap_rights_t r_rs;
- cap_rights_init(&r_rs, CAP_READ, CAP_SEEK);
- cap_rights_t r_ws;
- cap_rights_init(&r_ws, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rws;
- cap_rights_init(&r_rws, CAP_READ, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rwspoll;
- cap_rights_init(&r_rwspoll, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_EVENT);
- cap_rights_t r_epoll;
- cap_rights_init(&r_epoll, CAP_EPOLL_CTL);
-
- int cap_epoll_wo = dup(epoll_fd);
- EXPECT_OK(cap_epoll_wo);
- EXPECT_OK(cap_rights_limit(cap_epoll_wo, &r_ws));
- int cap_epoll_ro = dup(epoll_fd);
- EXPECT_OK(cap_epoll_ro);
- EXPECT_OK(cap_rights_limit(cap_epoll_ro, &r_rs));
- int cap_epoll_rw = dup(epoll_fd);
- EXPECT_OK(cap_epoll_rw);
- EXPECT_OK(cap_rights_limit(cap_epoll_rw, &r_rws));
- int cap_epoll_poll = dup(epoll_fd);
- EXPECT_OK(cap_epoll_poll);
- EXPECT_OK(cap_rights_limit(cap_epoll_poll, &r_rwspoll));
- int cap_epoll_ctl = dup(epoll_fd);
- EXPECT_OK(cap_epoll_ctl);
- EXPECT_OK(cap_rights_limit(cap_epoll_ctl, &r_epoll));
-
- // Can only modify the FDs being monitored if the CAP_EPOLL_CTL right is present.
- struct epoll_event eev;
- memset(&eev, 0, sizeof(eev));
- eev.events = EPOLLIN|EPOLLOUT|EPOLLPRI;
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_ro, EPOLL_CTL_ADD, sock_fds[0], &eev));
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_wo, EPOLL_CTL_ADD, sock_fds[0], &eev));
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_rw, EPOLL_CTL_ADD, sock_fds[0], &eev));
- EXPECT_OK(epoll_ctl(cap_epoll_ctl, EPOLL_CTL_ADD, sock_fds[0], &eev));
- eev.events = EPOLLIN|EPOLLOUT;
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_ro, EPOLL_CTL_MOD, sock_fds[0], &eev));
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_wo, EPOLL_CTL_MOD, sock_fds[0], &eev));
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_rw, EPOLL_CTL_MOD, sock_fds[0], &eev));
- EXPECT_OK(epoll_ctl(cap_epoll_ctl, EPOLL_CTL_MOD, sock_fds[0], &eev));
-
- // Running epoll_pwait(2) requires CAP_EVENT.
- eev.events = 0;
- EXPECT_NOTCAPABLE(epoll_pwait(cap_epoll_ro, &eev, 1, 100, NULL));
- EXPECT_NOTCAPABLE(epoll_pwait(cap_epoll_wo, &eev, 1, 100, NULL));
- EXPECT_NOTCAPABLE(epoll_pwait(cap_epoll_rw, &eev, 1, 100, NULL));
- EXPECT_OK(epoll_pwait(cap_epoll_poll, &eev, 1, 100, NULL));
- EXPECT_EQ(EPOLLIN, eev.events & EPOLLIN);
-
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_ro, EPOLL_CTL_DEL, sock_fds[0], &eev));
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_wo, EPOLL_CTL_DEL, sock_fds[0], &eev));
- EXPECT_NOTCAPABLE(epoll_ctl(cap_epoll_rw, EPOLL_CTL_DEL, sock_fds[0], &eev));
- EXPECT_OK(epoll_ctl(epoll_fd, EPOLL_CTL_DEL, sock_fds[0], &eev));
-
- close(cap_epoll_ctl);
- close(cap_epoll_poll);
- close(cap_epoll_rw);
- close(cap_epoll_ro);
- close(cap_epoll_wo);
- close(epoll_fd);
- close(sock_fds[1]);
- close(sock_fds[0]);
-}
-
-TEST(Linux, fstatat) {
- int fd = open(TmpFile("cap_fstatat"), O_CREAT|O_RDWR, 0644);
- EXPECT_OK(fd);
- unsigned char buffer[] = {1, 2, 3, 4};
- EXPECT_OK(write(fd, buffer, sizeof(buffer)));
- cap_rights_t rights;
- int cap_rf = dup(fd);
- EXPECT_OK(cap_rf);
- EXPECT_OK(cap_rights_limit(cap_rf, cap_rights_init(&rights, CAP_READ, CAP_FSTAT)));
- int cap_ro = dup(fd);
- EXPECT_OK(cap_ro);
- EXPECT_OK(cap_rights_limit(cap_ro, cap_rights_init(&rights, CAP_READ)));
-
- struct stat info;
- EXPECT_OK(fstatat(fd, "", &info, AT_EMPTY_PATH));
- EXPECT_NOTCAPABLE(fstatat(cap_ro, "", &info, AT_EMPTY_PATH));
- EXPECT_OK(fstatat(cap_rf, "", &info, AT_EMPTY_PATH));
-
- close(cap_ro);
- close(cap_rf);
- close(fd);
-
- int dir = open(tmpdir.c_str(), O_RDONLY);
- EXPECT_OK(dir);
- int dir_rf = dup(dir);
- EXPECT_OK(dir_rf);
- EXPECT_OK(cap_rights_limit(dir_rf, cap_rights_init(&rights, CAP_READ, CAP_FSTAT)));
- int dir_ro = dup(fd);
- EXPECT_OK(dir_ro);
- EXPECT_OK(cap_rights_limit(dir_ro, cap_rights_init(&rights, CAP_READ)));
-
- EXPECT_OK(fstatat(dir, "cap_fstatat", &info, AT_EMPTY_PATH));
- EXPECT_NOTCAPABLE(fstatat(dir_ro, "cap_fstatat", &info, AT_EMPTY_PATH));
- EXPECT_OK(fstatat(dir_rf, "cap_fstatat", &info, AT_EMPTY_PATH));
-
- close(dir_ro);
- close(dir_rf);
- close(dir);
-
- unlink(TmpFile("cap_fstatat"));
-}
-
-// fanotify support may not be available at compile-time
-#ifdef __NR_fanotify_init
-TEST(Linux, FanotifyIfRoot) {
- GTEST_SKIP_IF_NOT_ROOT();
- int fa_fd = fanotify_init(FAN_CLASS_NOTIF, O_RDWR);
- EXPECT_OK(fa_fd);
- if (fa_fd < 0) return; // May not be enabled
-
- cap_rights_t r_rs;
- cap_rights_init(&r_rs, CAP_READ, CAP_SEEK);
- cap_rights_t r_ws;
- cap_rights_init(&r_ws, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rws;
- cap_rights_init(&r_rws, CAP_READ, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rwspoll;
- cap_rights_init(&r_rwspoll, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_EVENT);
- cap_rights_t r_rwsnotify;
- cap_rights_init(&r_rwsnotify, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_NOTIFY);
- cap_rights_t r_rsl;
- cap_rights_init(&r_rsl, CAP_READ, CAP_SEEK, CAP_LOOKUP);
- cap_rights_t r_rslstat;
- cap_rights_init(&r_rslstat, CAP_READ, CAP_SEEK, CAP_LOOKUP, CAP_FSTAT);
- cap_rights_t r_rsstat;
- cap_rights_init(&r_rsstat, CAP_READ, CAP_SEEK, CAP_FSTAT);
-
- int cap_fd_ro = dup(fa_fd);
- EXPECT_OK(cap_fd_ro);
- EXPECT_OK(cap_rights_limit(cap_fd_ro, &r_rs));
- int cap_fd_wo = dup(fa_fd);
- EXPECT_OK(cap_fd_wo);
- EXPECT_OK(cap_rights_limit(cap_fd_wo, &r_ws));
- int cap_fd_rw = dup(fa_fd);
- EXPECT_OK(cap_fd_rw);
- EXPECT_OK(cap_rights_limit(cap_fd_rw, &r_rws));
- int cap_fd_poll = dup(fa_fd);
- EXPECT_OK(cap_fd_poll);
- EXPECT_OK(cap_rights_limit(cap_fd_poll, &r_rwspoll));
- int cap_fd_not = dup(fa_fd);
- EXPECT_OK(cap_fd_not);
- EXPECT_OK(cap_rights_limit(cap_fd_not, &r_rwsnotify));
-
- int rc = mkdir(TmpFile("cap_notify"), 0755);
- EXPECT_TRUE(rc == 0 || errno == EEXIST);
- int dfd = open(TmpFile("cap_notify"), O_RDONLY);
- EXPECT_OK(dfd);
- int fd = open(TmpFile("cap_notify/file"), O_CREAT|O_RDWR, 0644);
- close(fd);
- int cap_dfd = dup(dfd);
- EXPECT_OK(cap_dfd);
- EXPECT_OK(cap_rights_limit(cap_dfd, &r_rslstat));
- EXPECT_OK(cap_dfd);
- int cap_dfd_rs = dup(dfd);
- EXPECT_OK(cap_dfd_rs);
- EXPECT_OK(cap_rights_limit(cap_dfd_rs, &r_rs));
- EXPECT_OK(cap_dfd_rs);
- int cap_dfd_rsstat = dup(dfd);
- EXPECT_OK(cap_dfd_rsstat);
- EXPECT_OK(cap_rights_limit(cap_dfd_rsstat, &r_rsstat));
- EXPECT_OK(cap_dfd_rsstat);
- int cap_dfd_rsl = dup(dfd);
- EXPECT_OK(cap_dfd_rsl);
- EXPECT_OK(cap_rights_limit(cap_dfd_rsl, &r_rsl));
- EXPECT_OK(cap_dfd_rsl);
-
- // Need CAP_NOTIFY to change what's monitored.
- EXPECT_NOTCAPABLE(fanotify_mark(cap_fd_ro, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY|FAN_EVENT_ON_CHILD, cap_dfd, NULL));
- EXPECT_NOTCAPABLE(fanotify_mark(cap_fd_wo, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY|FAN_EVENT_ON_CHILD, cap_dfd, NULL));
- EXPECT_NOTCAPABLE(fanotify_mark(cap_fd_rw, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY|FAN_EVENT_ON_CHILD, cap_dfd, NULL));
- EXPECT_OK(fanotify_mark(cap_fd_not, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY|FAN_EVENT_ON_CHILD, cap_dfd, NULL));
-
- // Need CAP_FSTAT on the thing monitored.
- EXPECT_NOTCAPABLE(fanotify_mark(cap_fd_not, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY|FAN_EVENT_ON_CHILD, cap_dfd_rs, NULL));
- EXPECT_OK(fanotify_mark(cap_fd_not, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY|FAN_EVENT_ON_CHILD, cap_dfd_rsstat, NULL));
-
- // Too add monitoring of a file under a dfd, need CAP_LOOKUP|CAP_FSTAT on the dfd.
- EXPECT_NOTCAPABLE(fanotify_mark(cap_fd_not, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY, cap_dfd_rsstat, "file"));
- EXPECT_NOTCAPABLE(fanotify_mark(cap_fd_not, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY, cap_dfd_rsl, "file"));
- EXPECT_OK(fanotify_mark(cap_fd_not, FAN_MARK_ADD, FAN_OPEN|FAN_MODIFY, cap_dfd, "file"));
-
- pid_t child = fork();
- if (child == 0) {
- // Child: Perform activity in the directory under notify.
- sleep(1);
- unlink(TmpFile("cap_notify/temp"));
- int fd = open(TmpFile("cap_notify/temp"), O_CREAT|O_RDWR, 0644);
- close(fd);
- exit(0);
- }
-
- // Need CAP_EVENT to poll.
- struct pollfd poll_fd;
- poll_fd.revents = 0;
- poll_fd.events = POLLIN;
- poll_fd.fd = cap_fd_rw;
- EXPECT_OK(poll(&poll_fd, 1, 1400));
- EXPECT_EQ(0, (poll_fd.revents & POLLIN));
- EXPECT_NE(0, (poll_fd.revents & POLLNVAL));
-
- poll_fd.fd = cap_fd_not;
- EXPECT_OK(poll(&poll_fd, 1, 1400));
- EXPECT_EQ(0, (poll_fd.revents & POLLIN));
- EXPECT_NE(0, (poll_fd.revents & POLLNVAL));
-
- poll_fd.fd = cap_fd_poll;
- EXPECT_OK(poll(&poll_fd, 1, 1400));
- EXPECT_NE(0, (poll_fd.revents & POLLIN));
- EXPECT_EQ(0, (poll_fd.revents & POLLNVAL));
-
- // Need CAP_READ to read.
- struct fanotify_event_metadata ev;
- memset(&ev, 0, sizeof(ev));
- EXPECT_NOTCAPABLE(read(cap_fd_wo, &ev, sizeof(ev)));
- rc = read(fa_fd, &ev, sizeof(ev));
- EXPECT_OK(rc);
- EXPECT_EQ((int)sizeof(struct fanotify_event_metadata), rc);
- EXPECT_EQ(child, ev.pid);
- EXPECT_NE(0, ev.fd);
-
- // TODO(drysdale): reinstate if/when capsicum-linux propagates rights
- // to fanotify-generated FDs.
-#ifdef OMIT
- // fanotify(7) gives us a FD for the changed file. This should
- // only have rights that are a subset of those for the original
- // monitored directory file descriptor.
- cap_rights_t rights;
- CAL_ALL(&rights);
- EXPECT_OK(cap_rights_get(ev.fd, &rights));
- EXPECT_RIGHTS_IN(&rights, &r_rslstat);
-#endif
-
- // Wait for the child.
- int status;
- EXPECT_EQ(child, waitpid(child, &status, 0));
- rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
-
- close(cap_dfd_rsstat);
- close(cap_dfd_rsl);
- close(cap_dfd_rs);
- close(cap_dfd);
- close(dfd);
- unlink(TmpFile("cap_notify/file"));
- unlink(TmpFile("cap_notify/temp"));
- rmdir(TmpFile("cap_notify"));
- close(cap_fd_not);
- close(cap_fd_poll);
- close(cap_fd_rw);
- close(cap_fd_wo);
- close(cap_fd_ro);
- close(fa_fd);
-}
-#endif
-
-TEST(Linux, inotify) {
- int i_fd = inotify_init();
- EXPECT_OK(i_fd);
-
- cap_rights_t r_rs;
- cap_rights_init(&r_rs, CAP_READ, CAP_SEEK);
- cap_rights_t r_ws;
- cap_rights_init(&r_ws, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rws;
- cap_rights_init(&r_rws, CAP_READ, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rwsnotify;
- cap_rights_init(&r_rwsnotify, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_NOTIFY);
-
- int cap_fd_ro = dup(i_fd);
- EXPECT_OK(cap_fd_ro);
- EXPECT_OK(cap_rights_limit(cap_fd_ro, &r_rs));
- int cap_fd_wo = dup(i_fd);
- EXPECT_OK(cap_fd_wo);
- EXPECT_OK(cap_rights_limit(cap_fd_wo, &r_ws));
- int cap_fd_rw = dup(i_fd);
- EXPECT_OK(cap_fd_rw);
- EXPECT_OK(cap_rights_limit(cap_fd_rw, &r_rws));
- int cap_fd_all = dup(i_fd);
- EXPECT_OK(cap_fd_all);
- EXPECT_OK(cap_rights_limit(cap_fd_all, &r_rwsnotify));
-
- int fd = open(TmpFile("cap_inotify"), O_CREAT|O_RDWR, 0644);
- EXPECT_NOTCAPABLE(inotify_add_watch(cap_fd_rw, TmpFile("cap_inotify"), IN_ACCESS|IN_MODIFY));
- int wd = inotify_add_watch(i_fd, TmpFile("cap_inotify"), IN_ACCESS|IN_MODIFY);
- EXPECT_OK(wd);
-
- unsigned char buffer[] = {1, 2, 3, 4};
- EXPECT_OK(write(fd, buffer, sizeof(buffer)));
-
- struct inotify_event iev;
- memset(&iev, 0, sizeof(iev));
- EXPECT_NOTCAPABLE(read(cap_fd_wo, &iev, sizeof(iev)));
- int rc = read(cap_fd_ro, &iev, sizeof(iev));
- EXPECT_OK(rc);
- EXPECT_EQ((int)sizeof(iev), rc);
- EXPECT_EQ(wd, iev.wd);
-
- EXPECT_NOTCAPABLE(inotify_rm_watch(cap_fd_wo, wd));
- EXPECT_OK(inotify_rm_watch(cap_fd_all, wd));
-
- close(fd);
- close(cap_fd_all);
- close(cap_fd_rw);
- close(cap_fd_wo);
- close(cap_fd_ro);
- close(i_fd);
- unlink(TmpFile("cap_inotify"));
-}
-
-TEST(Linux, ArchChangeIfAvailable) {
- const char* prog_candidates[] = {"./mini-me.32", "./mini-me.x32", "./mini-me.64"};
- const char* progs[] = {NULL, NULL, NULL};
- char* argv_pass[] = {(char*)"to-come", (char*)"--capmode", NULL};
- char* null_envp[] = {NULL};
- int fds[3];
- int count = 0;
-
- for (int ii = 0; ii < 3; ii++) {
- fds[count] = open(prog_candidates[ii], O_RDONLY);
- if (fds[count] >= 0) {
- progs[count] = prog_candidates[ii];
- count++;
- }
- }
- if (count == 0) {
- GTEST_SKIP() << "no different-architecture programs available";
- }
-
- for (int ii = 0; ii < count; ii++) {
- // Fork-and-exec a binary of this architecture.
- pid_t child = fork();
- if (child == 0) {
- EXPECT_OK(cap_enter()); // Enter capability mode
- if (verbose) fprintf(stderr, "[%d] call fexecve(%s, %s)\n",
- getpid_(), progs[ii], argv_pass[1]);
- argv_pass[0] = (char *)progs[ii];
- int rc = fexecve_(fds[ii], argv_pass, null_envp);
- fprintf(stderr, "fexecve(%s) returned %d errno %d\n", progs[ii], rc, errno);
- exit(99); // Should not reach here.
- }
- int status;
- EXPECT_EQ(child, waitpid(child, &status, 0));
- int rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
- close(fds[ii]);
- }
-}
-
-FORK_TEST(Linux, NamespaceIfRoot) {
- GTEST_SKIP_IF_NOT_ROOT();
- pid_t me = getpid_();
-
- // Create a new UTS namespace.
- EXPECT_OK(unshare(CLONE_NEWUTS));
- // Open an FD to its symlink.
- char buffer[256];
- sprintf(buffer, "/proc/%d/ns/uts", me);
- int ns_fd = open(buffer, O_RDONLY);
-
- cap_rights_t r_rwlstat;
- cap_rights_init(&r_rwlstat, CAP_READ, CAP_WRITE, CAP_LOOKUP, CAP_FSTAT);
- cap_rights_t r_rwlstatns;
- cap_rights_init(&r_rwlstatns, CAP_READ, CAP_WRITE, CAP_LOOKUP, CAP_FSTAT, CAP_SETNS);
-
- int cap_fd = dup(ns_fd);
- EXPECT_OK(cap_fd);
- EXPECT_OK(cap_rights_limit(cap_fd, &r_rwlstat));
- int cap_fd_setns = dup(ns_fd);
- EXPECT_OK(cap_fd_setns);
- EXPECT_OK(cap_rights_limit(cap_fd_setns, &r_rwlstatns));
- EXPECT_NOTCAPABLE(setns(cap_fd, CLONE_NEWUTS));
- EXPECT_OK(setns(cap_fd_setns, CLONE_NEWUTS));
-
- EXPECT_OK(cap_enter()); // Enter capability mode.
-
- // No setns(2) but unshare(2) is allowed.
- EXPECT_CAPMODE(setns(ns_fd, CLONE_NEWUTS));
- EXPECT_OK(unshare(CLONE_NEWUTS));
-}
-
-static void SendFD(int fd, int over) {
- struct msghdr mh;
- mh.msg_name = NULL; // No address needed
- mh.msg_namelen = 0;
- char buffer1[1024];
- struct iovec iov[1];
- iov[0].iov_base = buffer1;
- iov[0].iov_len = sizeof(buffer1);
- mh.msg_iov = iov;
- mh.msg_iovlen = 1;
- char buffer2[1024];
- mh.msg_control = buffer2;
- mh.msg_controllen = CMSG_LEN(sizeof(int));
- struct cmsghdr *cmptr = CMSG_FIRSTHDR(&mh);
- cmptr->cmsg_level = SOL_SOCKET;
- cmptr->cmsg_type = SCM_RIGHTS;
- cmptr->cmsg_len = CMSG_LEN(sizeof(int));
- *(int *)CMSG_DATA(cmptr) = fd;
- buffer1[0] = 0;
- iov[0].iov_len = 1;
- int rc = sendmsg(over, &mh, 0);
- EXPECT_OK(rc);
-}
-
-static int ReceiveFD(int over) {
- struct msghdr mh;
- mh.msg_name = NULL; // No address needed
- mh.msg_namelen = 0;
- char buffer1[1024];
- struct iovec iov[1];
- iov[0].iov_base = buffer1;
- iov[0].iov_len = sizeof(buffer1);
- mh.msg_iov = iov;
- mh.msg_iovlen = 1;
- char buffer2[1024];
- mh.msg_control = buffer2;
- mh.msg_controllen = sizeof(buffer2);
- int rc = recvmsg(over, &mh, 0);
- EXPECT_OK(rc);
- EXPECT_LE(CMSG_LEN(sizeof(int)), mh.msg_controllen);
- struct cmsghdr *cmptr = CMSG_FIRSTHDR(&mh);
- int fd = *(int*)CMSG_DATA(cmptr);
- EXPECT_EQ(CMSG_LEN(sizeof(int)), cmptr->cmsg_len);
- cmptr = CMSG_NXTHDR(&mh, cmptr);
- EXPECT_TRUE(cmptr == NULL);
- return fd;
-}
-
-static int shared_pd = -1;
-static int shared_sock_fds[2];
-
-static int ChildFunc(void *arg) {
- // This function is running in a new PID namespace, and so is pid 1.
- if (verbose) fprintf(stderr, " ChildFunc: pid=%d, ppid=%d\n", getpid_(), getppid());
- EXPECT_EQ(1, getpid_());
- EXPECT_EQ(0, getppid());
-
- // The shared process descriptor is outside our namespace, so we cannot
- // get its pid.
- if (verbose) fprintf(stderr, " ChildFunc: shared_pd=%d\n", shared_pd);
- pid_t shared_child = -1;
- EXPECT_OK(pdgetpid(shared_pd, &shared_child));
- if (verbose) fprintf(stderr, " ChildFunc: corresponding pid=%d\n", shared_child);
- EXPECT_EQ(0, shared_child);
-
- // But we can pdkill() it even so.
- if (verbose) fprintf(stderr, " ChildFunc: call pdkill(pd=%d)\n", shared_pd);
- EXPECT_OK(pdkill(shared_pd, SIGINT));
-
- int pd;
- pid_t child = pdfork(&pd, 0);
- EXPECT_OK(child);
- if (child == 0) {
- // Child: expect pid 2.
- if (verbose) fprintf(stderr, " child of ChildFunc: pid=%d, ppid=%d\n", getpid_(), getppid());
- EXPECT_EQ(2, getpid_());
- EXPECT_EQ(1, getppid());
- while (true) {
- if (verbose) fprintf(stderr, " child of ChildFunc: \"I aten't dead\"\n");
- sleep(1);
- }
- exit(0);
- }
- EXPECT_EQ(2, child);
- EXPECT_PID_ALIVE(child);
- if (verbose) fprintf(stderr, " ChildFunc: pdfork() -> pd=%d, corresponding pid=%d state='%c'\n",
- pd, child, ProcessState(child));
-
- pid_t pid;
- EXPECT_OK(pdgetpid(pd, &pid));
- EXPECT_EQ(child, pid);
-
- sleep(2);
-
- // Send the process descriptor over UNIX domain socket back to parent.
- SendFD(pd, shared_sock_fds[1]);
-
- // Wait for death of (grand)child, killed by our parent.
- if (verbose) fprintf(stderr, " ChildFunc: wait on pid=%d\n", child);
- int status;
- EXPECT_EQ(child, wait4(child, &status, __WALL, NULL));
-
- if (verbose) fprintf(stderr, " ChildFunc: return 0\n");
- return 0;
-}
-
-#define STACK_SIZE (1024 * 1024)
-static char child_stack[STACK_SIZE];
-
-// TODO(drysdale): fork into a user namespace first so GTEST_SKIP_IF_NOT_ROOT can be removed.
-TEST(Linux, PidNamespacePdForkIfRoot) {
- GTEST_SKIP_IF_NOT_ROOT();
- // Pass process descriptors in both directions across a PID namespace boundary.
- // pdfork() off a child before we start, holding its process descriptor in a global
- // variable that's accessible to children.
- pid_t firstborn = pdfork(&shared_pd, 0);
- EXPECT_OK(firstborn);
- if (firstborn == 0) {
- while (true) {
- if (verbose) fprintf(stderr, " Firstborn: \"I aten't dead\"\n");
- sleep(1);
- }
- exit(0);
- }
- EXPECT_PID_ALIVE(firstborn);
- if (verbose) fprintf(stderr, "Parent: pre-pdfork()ed pd=%d, pid=%d state='%c'\n",
- shared_pd, firstborn, ProcessState(firstborn));
- sleep(2);
-
- // Prepare sockets to communicate with child process.
- EXPECT_OK(socketpair(AF_UNIX, SOCK_STREAM, 0, shared_sock_fds));
-
- // Clone into a child process with a new pid namespace.
- pid_t child = clone(ChildFunc, child_stack + STACK_SIZE,
- CLONE_FILES|CLONE_NEWPID|SIGCHLD, NULL);
- EXPECT_OK(child);
- EXPECT_PID_ALIVE(child);
- if (verbose) fprintf(stderr, "Parent: child is %d state='%c'\n", child, ProcessState(child));
-
- // Ensure the child runs. First thing it does is to kill our firstborn, using shared_pd.
- sleep(1);
- EXPECT_PID_DEAD(firstborn);
-
- // But we can still retrieve firstborn's PID, as it's not been reaped yet.
- pid_t child0;
- EXPECT_OK(pdgetpid(shared_pd, &child0));
- EXPECT_EQ(firstborn, child0);
- if (verbose) fprintf(stderr, "Parent: check on firstborn: pdgetpid(pd=%d) -> child=%d state='%c'\n",
- shared_pd, child0, ProcessState(child0));
-
- // Now reap it.
- int status;
- EXPECT_EQ(firstborn, waitpid(firstborn, &status, __WALL));
-
- // Get the process descriptor of the child-of-child via socket transfer.
- int grandchild_pd = ReceiveFD(shared_sock_fds[0]);
-
- // Our notion of the pid associated with the grandchild is in the main PID namespace.
- pid_t grandchild;
- EXPECT_OK(pdgetpid(grandchild_pd, &grandchild));
- EXPECT_NE(2, grandchild);
- if (verbose) fprintf(stderr, "Parent: pre-pdkill: pdgetpid(grandchild_pd=%d) -> grandchild=%d state='%c'\n",
- grandchild_pd, grandchild, ProcessState(grandchild));
- EXPECT_PID_ALIVE(grandchild);
-
- // Kill the grandchild via the process descriptor.
- EXPECT_OK(pdkill(grandchild_pd, SIGINT));
- usleep(10000);
- if (verbose) fprintf(stderr, "Parent: post-pdkill: pdgetpid(grandchild_pd=%d) -> grandchild=%d state='%c'\n",
- grandchild_pd, grandchild, ProcessState(grandchild));
- EXPECT_PID_DEAD(grandchild);
-
- sleep(2);
-
- // Wait for the child.
- EXPECT_EQ(child, waitpid(child, &status, WNOHANG));
- int rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
-
- close(shared_sock_fds[0]);
- close(shared_sock_fds[1]);
- close(shared_pd);
- close(grandchild_pd);
-}
-
-int NSInit(void *data) {
- // This function is running in a new PID namespace, and so is pid 1.
- if (verbose) fprintf(stderr, " NSInit: pid=%d, ppid=%d\n", getpid_(), getppid());
- EXPECT_EQ(1, getpid_());
- EXPECT_EQ(0, getppid());
-
- int pd;
- pid_t child = pdfork(&pd, 0);
- EXPECT_OK(child);
- if (child == 0) {
- // Child: loop forever until terminated.
- if (verbose) fprintf(stderr, " child of NSInit: pid=%d, ppid=%d\n", getpid_(), getppid());
- while (true) {
- if (verbose) fprintf(stderr, " child of NSInit: \"I aten't dead\"\n");
- usleep(100000);
- }
- exit(0);
- }
- EXPECT_EQ(2, child);
- EXPECT_PID_ALIVE(child);
- if (verbose) fprintf(stderr, " NSInit: pdfork() -> pd=%d, corresponding pid=%d state='%c'\n",
- pd, child, ProcessState(child));
- sleep(1);
-
- // Send the process descriptor over UNIX domain socket back to parent.
- SendFD(pd, shared_sock_fds[1]);
- close(pd);
-
- // Wait for a byte back in the other direction.
- int value;
- if (verbose) fprintf(stderr, " NSInit: block waiting for value\n");
- read(shared_sock_fds[1], &value, sizeof(value));
-
- if (verbose) fprintf(stderr, " NSInit: return 0\n");
- return 0;
-}
-
-TEST(Linux, DeadNSInitIfRoot) {
- GTEST_SKIP_IF_NOT_ROOT();
-
- // Prepare sockets to communicate with child process.
- EXPECT_OK(socketpair(AF_UNIX, SOCK_STREAM, 0, shared_sock_fds));
-
- // Clone into a child process with a new pid namespace.
- pid_t child = clone(NSInit, child_stack + STACK_SIZE,
- CLONE_FILES|CLONE_NEWPID|SIGCHLD, NULL);
- usleep(10000);
- EXPECT_OK(child);
- EXPECT_PID_ALIVE(child);
- if (verbose) fprintf(stderr, "Parent: child is %d state='%c'\n", child, ProcessState(child));
-
- // Get the process descriptor of the child-of-child via socket transfer.
- int grandchild_pd = ReceiveFD(shared_sock_fds[0]);
- pid_t grandchild;
- EXPECT_OK(pdgetpid(grandchild_pd, &grandchild));
- if (verbose) fprintf(stderr, "Parent: grandchild is %d state='%c'\n", grandchild, ProcessState(grandchild));
-
- // Send an int to the child to trigger its termination. Grandchild should also
- // go, as its init process is gone.
- int zero = 0;
- if (verbose) fprintf(stderr, "Parent: write 0 to pipe\n");
- write(shared_sock_fds[0], &zero, sizeof(zero));
- EXPECT_PID_ZOMBIE(child);
- EXPECT_PID_GONE(grandchild);
-
- // Wait for the child.
- int status;
- EXPECT_EQ(child, waitpid(child, &status, WNOHANG));
- int rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
- EXPECT_PID_GONE(child);
-
- close(shared_sock_fds[0]);
- close(shared_sock_fds[1]);
- close(grandchild_pd);
-
- if (verbose) {
- fprintf(stderr, "Parent: child %d in state='%c'\n", child, ProcessState(child));
- fprintf(stderr, "Parent: grandchild %d in state='%c'\n", grandchild, ProcessState(grandchild));
- }
-}
-
-TEST(Linux, DeadNSInit2IfRoot) {
- GTEST_SKIP_IF_NOT_ROOT();
-
- // Prepare sockets to communicate with child process.
- EXPECT_OK(socketpair(AF_UNIX, SOCK_STREAM, 0, shared_sock_fds));
-
- // Clone into a child process with a new pid namespace.
- pid_t child = clone(NSInit, child_stack + STACK_SIZE,
- CLONE_FILES|CLONE_NEWPID|SIGCHLD, NULL);
- usleep(10000);
- EXPECT_OK(child);
- EXPECT_PID_ALIVE(child);
- if (verbose) fprintf(stderr, "Parent: child is %d state='%c'\n", child, ProcessState(child));
-
- // Get the process descriptor of the child-of-child via socket transfer.
- int grandchild_pd = ReceiveFD(shared_sock_fds[0]);
- pid_t grandchild;
- EXPECT_OK(pdgetpid(grandchild_pd, &grandchild));
- if (verbose) fprintf(stderr, "Parent: grandchild is %d state='%c'\n", grandchild, ProcessState(grandchild));
-
- // Kill the grandchild
- EXPECT_OK(pdkill(grandchild_pd, SIGINT));
- usleep(10000);
- EXPECT_PID_ZOMBIE(grandchild);
- // Close the process descriptor, so there are now no procdesc references to grandchild.
- close(grandchild_pd);
-
- // Send an int to the child to trigger its termination. Grandchild should also
- // go, as its init process is gone.
- int zero = 0;
- if (verbose) fprintf(stderr, "Parent: write 0 to pipe\n");
- write(shared_sock_fds[0], &zero, sizeof(zero));
- EXPECT_PID_ZOMBIE(child);
- EXPECT_PID_GONE(grandchild);
-
- // Wait for the child.
- int status;
- EXPECT_EQ(child, waitpid(child, &status, WNOHANG));
- int rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
-
- close(shared_sock_fds[0]);
- close(shared_sock_fds[1]);
-
- if (verbose) {
- fprintf(stderr, "Parent: child %d in state='%c'\n", child, ProcessState(child));
- fprintf(stderr, "Parent: grandchild %d in state='%c'\n", grandchild, ProcessState(grandchild));
- }
-}
-
-#ifdef __x86_64__
-FORK_TEST(Linux, CheckHighWord) {
- EXPECT_OK(cap_enter()); // Enter capability mode.
-
- int rc = prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(1, rc); // no_new_privs = 1
-
- // Set some of the high 32-bits of argument zero.
- uint64_t big_cmd = PR_GET_NO_NEW_PRIVS | 0x100000000LL;
- EXPECT_CAPMODE(syscall(__NR_prctl, big_cmd, 0, 0, 0, 0));
-}
-#endif
-
-FORK_TEST(Linux, PrctlOpenatBeneath) {
- // Set no_new_privs = 1
- EXPECT_OK(prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0));
- int rc = prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(1, rc); // no_new_privs = 1
-
- // Set openat-beneath mode
- EXPECT_OK(prctl(PR_SET_OPENAT_BENEATH, 1, 0, 0, 0));
- rc = prctl(PR_GET_OPENAT_BENEATH, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(1, rc); // openat_beneath = 1
-
- // Clear openat-beneath mode
- EXPECT_OK(prctl(PR_SET_OPENAT_BENEATH, 0, 0, 0, 0));
- rc = prctl(PR_GET_OPENAT_BENEATH, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(0, rc); // openat_beneath = 0
-
- EXPECT_OK(cap_enter()); // Enter capability mode
-
- // Expect to be in openat_beneath mode
- rc = prctl(PR_GET_OPENAT_BENEATH, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(1, rc); // openat_beneath = 1
-
- // Expect this to be immutable.
- EXPECT_CAPMODE(prctl(PR_SET_OPENAT_BENEATH, 0, 0, 0, 0));
- rc = prctl(PR_GET_OPENAT_BENEATH, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(1, rc); // openat_beneath = 1
-
-}
-
-FORK_TEST(Linux, NoNewPrivs) {
- if (getuid() == 0) {
- // If root, drop CAP_SYS_ADMIN POSIX.1e capability.
- struct __user_cap_header_struct hdr;
- hdr.version = _LINUX_CAPABILITY_VERSION_3;
- hdr.pid = getpid_();
- struct __user_cap_data_struct data[3];
- EXPECT_OK(capget(&hdr, &data[0]));
- data[0].effective &= ~(1 << CAP_SYS_ADMIN);
- data[0].permitted &= ~(1 << CAP_SYS_ADMIN);
- data[0].inheritable &= ~(1 << CAP_SYS_ADMIN);
- EXPECT_OK(capset(&hdr, &data[0]));
- }
- int rc = prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(0, rc); // no_new_privs == 0
-
- // Can't enter seccomp-bpf mode with no_new_privs == 0
- struct sock_filter filter[] = {
- BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW)
- };
- struct sock_fprog bpf;
- bpf.len = (sizeof(filter) / sizeof(filter[0]));
- bpf.filter = filter;
- rc = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &bpf, 0, 0);
- EXPECT_EQ(-1, rc);
- EXPECT_EQ(EACCES, errno);
-
- // Set no_new_privs = 1
- EXPECT_OK(prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0));
- rc = prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0);
- EXPECT_OK(rc);
- EXPECT_EQ(1, rc); // no_new_privs = 1
-
- // Can now turn on seccomp mode
- EXPECT_OK(prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &bpf, 0, 0));
-}
-
-/* Macros for BPF generation */
-#define BPF_RETURN_ERRNO(err) \
- BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ERRNO | (err & 0xFFFF))
-#define BPF_KILL_PROCESS \
- BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_KILL)
-#define BPF_ALLOW \
- BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW)
-#define EXAMINE_SYSCALL \
- BPF_STMT(BPF_LD+BPF_W+BPF_ABS, offsetof(struct seccomp_data, nr))
-#define ALLOW_SYSCALL(name) \
- BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_##name, 0, 1), \
- BPF_ALLOW
-#define KILL_SYSCALL(name) \
- BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_##name, 0, 1), \
- BPF_KILL_PROCESS
-#define FAIL_SYSCALL(name, err) \
- BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_##name, 0, 1), \
- BPF_RETURN_ERRNO(err)
-
-TEST(Linux, CapModeWithBPF) {
- pid_t child = fork();
- EXPECT_OK(child);
- if (child == 0) {
- int fd = open(TmpFile("cap_bpf_capmode"), O_CREAT|O_RDWR, 0644);
- cap_rights_t rights;
- cap_rights_init(&rights, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_FSYNC);
- EXPECT_OK(cap_rights_limit(fd, &rights));
-
- struct sock_filter filter[] = { EXAMINE_SYSCALL,
- FAIL_SYSCALL(fchmod, ENOMEM),
- FAIL_SYSCALL(fstat, ENOEXEC),
- ALLOW_SYSCALL(close),
- KILL_SYSCALL(fsync),
- BPF_ALLOW };
- struct sock_fprog bpf = {.len = (sizeof(filter) / sizeof(filter[0])),
- .filter = filter};
- // Set up seccomp-bpf first.
- EXPECT_OK(prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0));
- EXPECT_OK(prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &bpf, 0, 0));
-
- EXPECT_OK(cap_enter()); // Enter capability mode.
-
- // fchmod is allowed by Capsicum, but failed by BPF.
- EXPECT_SYSCALL_FAIL(ENOMEM, fchmod(fd, 0644));
- // open is allowed by BPF, but failed by Capsicum
- EXPECT_SYSCALL_FAIL(ECAPMODE, open(TmpFile("cap_bpf_capmode"), O_RDONLY));
- // fstat is failed by both BPF and Capsicum; tie-break is on errno
- struct stat buf;
- EXPECT_SYSCALL_FAIL(ENOEXEC, fstat(fd, &buf));
- // fsync is allowed by Capsicum, but BPF's SIGSYS generation take precedence
- fsync(fd); // terminate with unhandled SIGSYS
- exit(0);
- }
- int status;
- EXPECT_EQ(child, waitpid(child, &status, 0));
- EXPECT_TRUE(WIFSIGNALED(status));
- EXPECT_EQ(SIGSYS, WTERMSIG(status));
- unlink(TmpFile("cap_bpf_capmode"));
-}
-
-TEST(Linux, AIO) {
- int fd = open(TmpFile("cap_aio"), O_CREAT|O_RDWR, 0644);
- EXPECT_OK(fd);
-
- cap_rights_t r_rs;
- cap_rights_init(&r_rs, CAP_READ, CAP_SEEK);
- cap_rights_t r_ws;
- cap_rights_init(&r_ws, CAP_WRITE, CAP_SEEK);
- cap_rights_t r_rwssync;
- cap_rights_init(&r_rwssync, CAP_READ, CAP_WRITE, CAP_SEEK, CAP_FSYNC);
-
- int cap_ro = dup(fd);
- EXPECT_OK(cap_ro);
- EXPECT_OK(cap_rights_limit(cap_ro, &r_rs));
- EXPECT_OK(cap_ro);
- int cap_wo = dup(fd);
- EXPECT_OK(cap_wo);
- EXPECT_OK(cap_rights_limit(cap_wo, &r_ws));
- EXPECT_OK(cap_wo);
- int cap_all = dup(fd);
- EXPECT_OK(cap_all);
- EXPECT_OK(cap_rights_limit(cap_all, &r_rwssync));
- EXPECT_OK(cap_all);
-
- // Linux: io_setup, io_submit, io_getevents, io_cancel, io_destroy
- aio_context_t ctx = 0;
- EXPECT_OK(syscall(__NR_io_setup, 10, &ctx));
-
- unsigned char buffer[32] = {1, 2, 3, 4};
- struct iocb req;
- memset(&req, 0, sizeof(req));
- req.aio_reqprio = 0;
- req.aio_fildes = fd;
- uintptr_t bufaddr = (uintptr_t)buffer;
- req.aio_buf = (__u64)bufaddr;
- req.aio_nbytes = 4;
- req.aio_offset = 0;
- struct iocb* reqs[1] = {&req};
-
- // Write operation
- req.aio_lio_opcode = IOCB_CMD_PWRITE;
- req.aio_fildes = cap_ro;
- EXPECT_NOTCAPABLE(syscall(__NR_io_submit, ctx, 1, reqs));
- req.aio_fildes = cap_wo;
- EXPECT_OK(syscall(__NR_io_submit, ctx, 1, reqs));
-
- // Sync operation
- req.aio_lio_opcode = IOCB_CMD_FSYNC;
- EXPECT_NOTCAPABLE(syscall(__NR_io_submit, ctx, 1, reqs));
- req.aio_lio_opcode = IOCB_CMD_FDSYNC;
- EXPECT_NOTCAPABLE(syscall(__NR_io_submit, ctx, 1, reqs));
- // Even with CAP_FSYNC, turns out fsync/fdsync aren't implemented
- req.aio_fildes = cap_all;
- EXPECT_FAIL_NOT_NOTCAPABLE(syscall(__NR_io_submit, ctx, 1, reqs));
- req.aio_lio_opcode = IOCB_CMD_FSYNC;
- EXPECT_FAIL_NOT_NOTCAPABLE(syscall(__NR_io_submit, ctx, 1, reqs));
-
- // Read operation
- req.aio_lio_opcode = IOCB_CMD_PREAD;
- req.aio_fildes = cap_wo;
- EXPECT_NOTCAPABLE(syscall(__NR_io_submit, ctx, 1, reqs));
- req.aio_fildes = cap_ro;
- EXPECT_OK(syscall(__NR_io_submit, ctx, 1, reqs));
-
- EXPECT_OK(syscall(__NR_io_destroy, ctx));
-
- close(cap_all);
- close(cap_wo);
- close(cap_ro);
- close(fd);
- unlink(TmpFile("cap_aio"));
-}
-
-#ifndef KCMP_FILE
-#define KCMP_FILE 0
-#endif
-TEST(Linux, KcmpIfAvailable) {
- // This requires CONFIG_CHECKPOINT_RESTORE in kernel config.
- int fd = open("/etc/passwd", O_RDONLY);
- EXPECT_OK(fd);
- pid_t parent = getpid_();
-
- errno = 0;
- int rc = syscall(__NR_kcmp, parent, parent, KCMP_FILE, fd, fd);
- if (rc == -1 && errno == ENOSYS) {
- GTEST_SKIP() << "kcmp(2) gives -ENOSYS";
- }
-
- pid_t child = fork();
- if (child == 0) {
- // Child: limit rights on FD.
- child = getpid_();
- EXPECT_OK(syscall(__NR_kcmp, parent, child, KCMP_FILE, fd, fd));
- cap_rights_t rights;
- cap_rights_init(&rights, CAP_READ, CAP_WRITE);
- EXPECT_OK(cap_rights_limit(fd, &rights));
- // A capability wrapping a normal FD is different (from a kcmp(2) perspective)
- // than the original file.
- EXPECT_NE(0, syscall(__NR_kcmp, parent, child, KCMP_FILE, fd, fd));
- exit(HasFailure());
- }
- // Wait for the child.
- int status;
- EXPECT_EQ(child, waitpid(child, &status, 0));
- rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
- EXPECT_EQ(0, rc);
-
- close(fd);
-}
-
-TEST(Linux, ProcFS) {
- cap_rights_t rights;
- cap_rights_init(&rights, CAP_READ, CAP_SEEK);
- int fd = open("/etc/passwd", O_RDONLY);
- EXPECT_OK(fd);
- lseek(fd, 4, SEEK_SET);
- int cap = dup(fd);
- EXPECT_OK(cap);
- EXPECT_OK(cap_rights_limit(cap, &rights));
- pid_t me = getpid_();
-
- char buffer[1024];
- sprintf(buffer, "/proc/%d/fdinfo/%d", me, cap);
- int procfd = open(buffer, O_RDONLY);
- EXPECT_OK(procfd) << " failed to open " << buffer;
- if (procfd < 0) return;
- int proccap = dup(procfd);
- EXPECT_OK(proccap);
- EXPECT_OK(cap_rights_limit(proccap, &rights));
-
- EXPECT_OK(read(proccap, buffer, sizeof(buffer)));
- // The fdinfo should include the file pos of the underlying file
- EXPECT_NE((char*)NULL, strstr(buffer, "pos:\t4"));
- // ...and the rights of the Capsicum capability.
- EXPECT_NE((char*)NULL, strstr(buffer, "rights:\t0x"));
-
- close(procfd);
- close(proccap);
- close(cap);
- close(fd);
-}
-
-FORK_TEST(Linux, ProcessClocks) {
- pid_t self = getpid_();
- pid_t child = fork();
- EXPECT_OK(child);
- if (child == 0) {
- child = getpid_();
- usleep(100000);
- exit(0);
- }
-
- EXPECT_OK(cap_enter()); // Enter capability mode.
-
- // Nefariously build a clock ID for the child's CPU time.
- // This relies on knowledge of the internal layout of clock IDs.
- clockid_t child_clock;
- child_clock = ((~child) << 3) | 0x0;
- struct timespec ts;
- memset(&ts, 0, sizeof(ts));
-
- // TODO(drysdale): Should not be possible to retrieve info about a
- // different process, as the PID global namespace should be locked
- // down.
- EXPECT_OK(clock_gettime(child_clock, &ts));
- if (verbose) fprintf(stderr, "[parent: %d] clock_gettime(child=%d->0x%08x) is %ld.%09ld \n",
- self, child, child_clock, (long)ts.tv_sec, (long)ts.tv_nsec);
-
- child_clock = ((~1) << 3) | 0x0;
- memset(&ts, 0, sizeof(ts));
- EXPECT_OK(clock_gettime(child_clock, &ts));
- if (verbose) fprintf(stderr, "[parent: %d] clock_gettime(init=1->0x%08x) is %ld.%09ld \n",
- self, child_clock, (long)ts.tv_sec, (long)ts.tv_nsec);
-
- // Orphan the child.
-}
-
-TEST(Linux, SetLease) {
- int fd_all = open(TmpFile("cap_lease"), O_CREAT|O_RDWR, 0644);
- EXPECT_OK(fd_all);
- int fd_rw = dup(fd_all);
- EXPECT_OK(fd_rw);
-
- cap_rights_t r_all;
- cap_rights_init(&r_all, CAP_READ, CAP_WRITE, CAP_FLOCK, CAP_FSIGNAL);
- EXPECT_OK(cap_rights_limit(fd_all, &r_all));
-
- cap_rights_t r_rw;
- cap_rights_init(&r_rw, CAP_READ, CAP_WRITE);
- EXPECT_OK(cap_rights_limit(fd_rw, &r_rw));
-
- EXPECT_NOTCAPABLE(fcntl(fd_rw, F_SETLEASE, F_WRLCK));
- EXPECT_NOTCAPABLE(fcntl(fd_rw, F_GETLEASE));
-
- if (!tmpdir_on_tmpfs) { // tmpfs doesn't support leases
- EXPECT_OK(fcntl(fd_all, F_SETLEASE, F_WRLCK));
- EXPECT_EQ(F_WRLCK, fcntl(fd_all, F_GETLEASE));
-
- EXPECT_OK(fcntl(fd_all, F_SETLEASE, F_UNLCK, 0));
- EXPECT_EQ(F_UNLCK, fcntl(fd_all, F_GETLEASE));
- }
- close(fd_all);
- close(fd_rw);
- unlink(TmpFile("cap_lease"));
-}
-
-TEST(Linux, InvalidRightsSyscall) {
- int fd = open(TmpFile("cap_invalid_rights"), O_RDONLY|O_CREAT, 0644);
- EXPECT_OK(fd);
-
- cap_rights_t rights;
- cap_rights_init(&rights, CAP_READ, CAP_WRITE, CAP_FCHMOD, CAP_FSTAT);
-
- // Use the raw syscall throughout.
- EXPECT_EQ(0, syscall(__NR_cap_rights_limit, fd, &rights, 0, 0, NULL, 0));
-
- // Directly access the syscall, and find all unseemly manner of use for it.
- // - Invalid flags
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, 0, 0, NULL, 1));
- EXPECT_EQ(EINVAL, errno);
- // - Specify an fcntl subright, but no CAP_FCNTL set
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, CAP_FCNTL_GETFL, 0, NULL, 0));
- EXPECT_EQ(EINVAL, errno);
- // - Specify an ioctl subright, but no CAP_IOCTL set
- unsigned int ioctl1 = 1;
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, 0, 1, &ioctl1, 0));
- EXPECT_EQ(EINVAL, errno);
- // - N ioctls, but null pointer passed
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, 0, 1, NULL, 0));
- EXPECT_EQ(EINVAL, errno);
- // - Invalid nioctls
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, 0, -2, NULL, 0));
- EXPECT_EQ(EINVAL, errno);
- // - Null primary rights
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, NULL, 0, 0, NULL, 0));
- EXPECT_EQ(EFAULT, errno);
- // - Invalid index bitmask
- rights.cr_rights[0] |= 3ULL << 57;
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, 0, 0, NULL, 0));
- EXPECT_EQ(EINVAL, errno);
- // - Invalid version
- rights.cr_rights[0] |= 2ULL << 62;
- EXPECT_EQ(-1, syscall(__NR_cap_rights_limit, fd, &rights, 0, 0, NULL, 0));
- EXPECT_EQ(EINVAL, errno);
-
- close(fd);
- unlink(TmpFile("cap_invalid_rights"));
-}
-
-FORK_TEST_ON(Linux, OpenByHandleAtIfRoot, TmpFile("cap_openbyhandle_testfile")) {
- GTEST_SKIP_IF_NOT_ROOT();
- int dir = open(tmpdir.c_str(), O_RDONLY);
- EXPECT_OK(dir);
- int fd = openat(dir, "cap_openbyhandle_testfile", O_RDWR|O_CREAT, 0644);
- EXPECT_OK(fd);
- const char* message = "Saved text";
- EXPECT_OK(write(fd, message, strlen(message)));
- close(fd);
-
- struct file_handle* fhandle = (struct file_handle*)malloc(sizeof(struct file_handle) + MAX_HANDLE_SZ);
- fhandle->handle_bytes = MAX_HANDLE_SZ;
- int mount_id;
- EXPECT_OK(name_to_handle_at(dir, "cap_openbyhandle_testfile", fhandle, &mount_id, 0));
-
- fd = open_by_handle_at(dir, fhandle, O_RDONLY);
- EXPECT_OK(fd);
- char buffer[200];
- ssize_t len = read(fd, buffer, 199);
- EXPECT_OK(len);
- EXPECT_EQ(std::string(message), std::string(buffer, len));
- close(fd);
-
- // Cannot issue open_by_handle_at after entering capability mode.
- cap_enter();
- EXPECT_CAPMODE(open_by_handle_at(dir, fhandle, O_RDONLY));
-
- close(dir);
-}
-
-int getrandom_(void *buf, size_t buflen, unsigned int flags) {
-#ifdef __NR_getrandom
- return syscall(__NR_getrandom, buf, buflen, flags);
-#else
- errno = ENOSYS;
- return -1;
-#endif
-}
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
-#include <linux/random.h> // Requires 3.17 kernel
-FORK_TEST(Linux, GetRandom) {
- EXPECT_OK(cap_enter());
- unsigned char buffer[1024];
- unsigned char buffer2[1024];
- EXPECT_OK(getrandom_(buffer, sizeof(buffer), GRND_NONBLOCK));
- EXPECT_OK(getrandom_(buffer2, sizeof(buffer2), GRND_NONBLOCK));
- EXPECT_NE(0, memcmp(buffer, buffer2, sizeof(buffer)));
-}
-#endif
-
-int memfd_create_(const char *name, unsigned int flags) {
-#ifdef __NR_memfd_create
- return syscall(__NR_memfd_create, name, flags);
-#else
- errno = ENOSYS;
- return -1;
-#endif
-}
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
-#include <linux/memfd.h> // Requires 3.17 kernel
-TEST(Linux, MemFDDeathTestIfAvailable) {
- int memfd = memfd_create_("capsicum-test", MFD_ALLOW_SEALING);
- if (memfd == -1 && errno == ENOSYS) {
- GTEST_SKIP() << "memfd_create(2) gives -ENOSYS";
- }
- const int LEN = 16;
- EXPECT_OK(ftruncate(memfd, LEN));
- int memfd_ro = dup(memfd);
- int memfd_rw = dup(memfd);
- EXPECT_OK(memfd_ro);
- EXPECT_OK(memfd_rw);
- cap_rights_t rights;
- EXPECT_OK(cap_rights_limit(memfd_ro, cap_rights_init(&rights, CAP_MMAP_R, CAP_FSTAT)));
- EXPECT_OK(cap_rights_limit(memfd_rw, cap_rights_init(&rights, CAP_MMAP_RW, CAP_FCHMOD)));
-
- unsigned char *p_ro = (unsigned char *)mmap(NULL, LEN, PROT_READ, MAP_SHARED, memfd_ro, 0);
- EXPECT_NE((unsigned char *)MAP_FAILED, p_ro);
- unsigned char *p_rw = (unsigned char *)mmap(NULL, LEN, PROT_READ|PROT_WRITE, MAP_SHARED, memfd_rw, 0);
- EXPECT_NE((unsigned char *)MAP_FAILED, p_rw);
- EXPECT_EQ(MAP_FAILED,
- mmap(NULL, LEN, PROT_READ|PROT_WRITE, MAP_SHARED, memfd_ro, 0));
-
- *p_rw = 42;
- EXPECT_EQ(42, *p_ro);
- EXPECT_DEATH(*p_ro = 42, "");
-
-#ifndef F_ADD_SEALS
- // Hack for when libc6 does not yet include the updated linux/fcntl.h from kernel 3.17
-#define _F_LINUX_SPECIFIC_BASE F_SETLEASE
-#define F_ADD_SEALS (_F_LINUX_SPECIFIC_BASE + 9)
-#define F_GET_SEALS (_F_LINUX_SPECIFIC_BASE + 10)
-#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
-#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
-#define F_SEAL_GROW 0x0004 /* prevent file from growing */
-#define F_SEAL_WRITE 0x0008 /* prevent writes */
-#endif
-
- // Reading the seal information requires CAP_FSTAT.
- int seals = fcntl(memfd, F_GET_SEALS);
- EXPECT_OK(seals);
- if (verbose) fprintf(stderr, "seals are %08x on base fd\n", seals);
- int seals_ro = fcntl(memfd_ro, F_GET_SEALS);
- EXPECT_EQ(seals, seals_ro);
- if (verbose) fprintf(stderr, "seals are %08x on read-only fd\n", seals_ro);
- int seals_rw = fcntl(memfd_rw, F_GET_SEALS);
- EXPECT_NOTCAPABLE(seals_rw);
-
- // Fail to seal as a writable mapping exists.
- EXPECT_EQ(-1, fcntl(memfd_rw, F_ADD_SEALS, F_SEAL_WRITE));
- EXPECT_EQ(EBUSY, errno);
- *p_rw = 42;
-
- // Seal the rw version; need to unmap first.
- munmap(p_rw, LEN);
- munmap(p_ro, LEN);
- EXPECT_OK(fcntl(memfd_rw, F_ADD_SEALS, F_SEAL_WRITE));
-
- seals = fcntl(memfd, F_GET_SEALS);
- EXPECT_OK(seals);
- if (verbose) fprintf(stderr, "seals are %08x on base fd\n", seals);
- seals_ro = fcntl(memfd_ro, F_GET_SEALS);
- EXPECT_EQ(seals, seals_ro);
- if (verbose) fprintf(stderr, "seals are %08x on read-only fd\n", seals_ro);
-
- // Remove the CAP_FCHMOD right, can no longer add seals.
- EXPECT_OK(cap_rights_limit(memfd_rw, cap_rights_init(&rights, CAP_MMAP_RW)));
- EXPECT_NOTCAPABLE(fcntl(memfd_rw, F_ADD_SEALS, F_SEAL_WRITE));
-
- close(memfd);
- close(memfd_ro);
- close(memfd_rw);
-}
-#endif
-
-#else
-void noop() {}
-#endif

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