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8ac5aef8f3
This change takes capsicum-test from upstream and applies some local changes to make the
tests work on FreeBSD when executed via Kyua.
The local modifications are as follows:
1. Make `OpenatTest.WithFlag` pass with the new dot-dot lookup behavior in FreeBSD 12.x+.
2. capsicum-test references a set of helper binaries: `mini-me`, `mini-me.noexec`, and
`mini-me.setuid`, as part of the execve/fexecve tests, via execve, fexecve, and open.
It achieves this upstream by assuming `mini-me*` is in the current directory, however,
in order for Kyua to execute `capsicum-test`, it needs to provide a full path to
`mini-me*`. In order to achieve this, I made `capsicum-test` cache the executable's
path from argv[0] in main(..) and use the cached value to compute the path to
`mini-me*` as part of the execve/fexecve testcases.
3. The capsicum-test test suite assumes that it's always being run on CAPABILITIES enabled
kernels. However, there's a chance that the test will be run on a host without a
CAPABILITIES enabled kernel, so we must check for the support before running the tests.
The way to achieve this is to add the relevant `feature_present("security_capabilities")`
check to SetupEnvironment::SetUp() and skip the tests when the support is not available.
While here, add a check for `kern.trap_enotcap` being enabled. As noted by markj@ in
https://github.com/google/capsicum-test/issues/23, this sysctl being enabled can trigger
non-deterministic failures. Therefore, the tests should be skipped if this sysctl is
enabled.
All local changes have been submitted to the capsicum-test project
(https://github.com/google/capsicum-test) and are in various stages of review.
Please see the following pull requests for more details:
1. https://github.com/google/capsicum-test/pull/35
2. https://github.com/google/capsicum-test/pull/41
3. https://github.com/google/capsicum-test/pull/42
Reviewed by: asomers
Discussed with: emaste, markj
Approved by: emaste (mentor)
MFC after: 2 months
Differential Revision: https://reviews.freebsd.org/D19758
143 lines
4.0 KiB
C++
143 lines
4.0 KiB
C++
#include <sys/select.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <poll.h>
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#include "capsicum.h"
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#include "syscalls.h"
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#include "capsicum-test.h"
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namespace {
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int AddFDToSet(fd_set* fset, int fd, int maxfd) {
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FD_SET(fd, fset);
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if (fd > maxfd) maxfd = fd;
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return maxfd;
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}
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int InitFDSet(fd_set* fset, int *fds, int fdcount) {
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FD_ZERO(fset);
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int maxfd = -1;
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for (int ii = 0; ii < fdcount; ii++) {
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maxfd = AddFDToSet(fset, fds[ii], maxfd);
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}
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return maxfd;
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}
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} // namespace
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FORK_TEST_ON(Select, LotsOFileDescriptors, TmpFile("cap_select")) {
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int fd = open(TmpFile("cap_select"), O_RDWR | O_CREAT, 0644);
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EXPECT_OK(fd);
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if (fd < 0) return;
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// Create many POLL_EVENT capabilities.
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const int kCapCount = 64;
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int cap_fd[kCapCount];
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cap_rights_t r_poll;
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cap_rights_init(&r_poll, CAP_EVENT);
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for (int ii = 0; ii < kCapCount; ii++) {
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cap_fd[ii] = dup(fd);
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EXPECT_OK(cap_fd[ii]);
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EXPECT_OK(cap_rights_limit(cap_fd[ii], &r_poll));
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}
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cap_rights_t r_rw;
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cap_rights_init(&r_rw, CAP_READ, CAP_WRITE, CAP_SEEK);
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int cap_rw = dup(fd);
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EXPECT_OK(cap_rw);
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EXPECT_OK(cap_rights_limit(cap_rw, &r_rw));
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EXPECT_OK(cap_enter()); // Enter capability mode
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = 100;
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// Add normal file descriptor and all CAP_EVENT capabilities
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fd_set rset;
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fd_set wset;
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int maxfd = InitFDSet(&rset, cap_fd, kCapCount);
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maxfd = AddFDToSet(&rset, fd, maxfd);
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InitFDSet(&wset, cap_fd, kCapCount);
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AddFDToSet(&rset, fd, 0);
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int ret = select(maxfd+1, &rset, &wset, NULL, &tv);
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EXPECT_OK(ret);
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// Now also include the capability with no CAP_EVENT.
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InitFDSet(&rset, cap_fd, kCapCount);
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AddFDToSet(&rset, fd, maxfd);
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maxfd = AddFDToSet(&rset, cap_rw, maxfd);
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InitFDSet(&wset, cap_fd, kCapCount);
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AddFDToSet(&wset, fd, maxfd);
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AddFDToSet(&wset, cap_rw, maxfd);
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ret = select(maxfd+1, &rset, &wset, NULL, &tv);
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EXPECT_NOTCAPABLE(ret);
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#ifdef HAVE_PSELECT
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// And again with pselect
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struct timespec ts;
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ts.tv_sec = 0;
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ts.tv_nsec = 100000;
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maxfd = InitFDSet(&rset, cap_fd, kCapCount);
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maxfd = AddFDToSet(&rset, fd, maxfd);
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InitFDSet(&wset, cap_fd, kCapCount);
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AddFDToSet(&rset, fd, 0);
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ret = pselect(maxfd+1, &rset, &wset, NULL, &ts, NULL);
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EXPECT_OK(ret);
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InitFDSet(&rset, cap_fd, kCapCount);
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AddFDToSet(&rset, fd, maxfd);
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maxfd = AddFDToSet(&rset, cap_rw, maxfd);
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InitFDSet(&wset, cap_fd, kCapCount);
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AddFDToSet(&wset, fd, maxfd);
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AddFDToSet(&wset, cap_rw, maxfd);
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ret = pselect(maxfd+1, &rset, &wset, NULL, &ts, NULL);
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EXPECT_NOTCAPABLE(ret);
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#endif
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}
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FORK_TEST_ON(Poll, LotsOFileDescriptors, TmpFile("cap_poll")) {
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int fd = open(TmpFile("cap_poll"), O_RDWR | O_CREAT, 0644);
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EXPECT_OK(fd);
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if (fd < 0) return;
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// Create many POLL_EVENT capabilities.
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const int kCapCount = 64;
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struct pollfd cap_fd[kCapCount + 2];
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cap_rights_t r_poll;
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cap_rights_init(&r_poll, CAP_EVENT);
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for (int ii = 0; ii < kCapCount; ii++) {
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cap_fd[ii].fd = dup(fd);
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EXPECT_OK(cap_fd[ii].fd);
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EXPECT_OK(cap_rights_limit(cap_fd[ii].fd, &r_poll));
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cap_fd[ii].events = POLLIN|POLLOUT;
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}
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cap_fd[kCapCount].fd = fd;
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cap_fd[kCapCount].events = POLLIN|POLLOUT;
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cap_rights_t r_rw;
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cap_rights_init(&r_rw, CAP_READ, CAP_WRITE, CAP_SEEK);
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int cap_rw = dup(fd);
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EXPECT_OK(cap_rw);
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EXPECT_OK(cap_rights_limit(cap_rw, &r_rw));
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cap_fd[kCapCount + 1].fd = cap_rw;
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cap_fd[kCapCount + 1].events = POLLIN|POLLOUT;
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EXPECT_OK(cap_enter()); // Enter capability mode
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EXPECT_OK(poll(cap_fd, kCapCount + 1, 10));
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// Now also include the capability with no CAP_EVENT.
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EXPECT_OK(poll(cap_fd, kCapCount + 2, 10));
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EXPECT_NE(0, (cap_fd[kCapCount + 1].revents & POLLNVAL));
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#ifdef HAVE_PPOLL
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// And again with ppoll
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struct timespec ts;
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ts.tv_sec = 0;
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ts.tv_nsec = 100000;
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EXPECT_OK(ppoll(cap_fd, kCapCount + 1, &ts, NULL));
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// Now also include the capability with no CAP_EVENT.
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EXPECT_OK(ppoll(cap_fd, kCapCount + 2, &ts, NULL));
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EXPECT_NE(0, (cap_fd[kCapCount + 1].revents & POLLNVAL));
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#endif
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}
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