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capsicum-test: Update for O_BENEATH removal

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Update the tests to check O_RESOLVE_BENEATH instead.
If this looks reasonable, I'll try to upstream this change.
This keeps a compat fallback for O_BENEATH since the Linux port still
has/had O_BENEATH with "no .., no absolute paths" semantics.

Test Plan:	`/usr/tests/sys/capsicum/capsicum-test -u 977` passes and
		runs the O_RESOLVE_BENEATH tests.
Reviewed By:	markj
Differential Revision: https://reviews.freebsd.org/D29016
This commit is contained in:
Alex Richardson 2021-03-12 17:12:10 +00:00
parent 34cc08e336
commit 8cf5812af4
1 changed files with 13 additions and 9 deletions
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22
contrib/capsicum-test/openat.cc
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@ -341,22 +341,26 @@ FORK_TEST_F(OpenatTest, InCapabilityMode) {
EXPECT_OPENAT_FAIL_TRAVERSAL(sub_fd_, "/etc/passwd", O_RDONLY);
}
#ifdef O_BENEATH
#if !defined(O_RESOLVE_BENEATH) && defined(O_BENEATH)
#define O_RESOLVE_BENEATH O_BENEATH
#endif
#ifdef O_RESOLVE_BENEATH
TEST_F(OpenatTest, WithFlag) {
CheckPolicing(O_BENEATH);
CheckPolicing(O_RESOLVE_BENEATH);
// Check with AT_FDCWD.
EXPECT_OPEN_OK(openat(AT_FDCWD, "topfile", O_RDONLY|O_BENEATH));
EXPECT_OPEN_OK(openat(AT_FDCWD, "subdir/bottomfile", O_RDONLY|O_BENEATH));
EXPECT_OPEN_OK(openat(AT_FDCWD, "topfile", O_RDONLY|O_RESOLVE_BENEATH));
EXPECT_OPEN_OK(openat(AT_FDCWD, "subdir/bottomfile", O_RDONLY|O_RESOLVE_BENEATH));
// Can't open paths starting with "/" with O_BENEATH specified.
EXPECT_OPENAT_FAIL_TRAVERSAL(AT_FDCWD, "/etc/passwd", O_RDONLY|O_BENEATH);
EXPECT_OPENAT_FAIL_TRAVERSAL(dir_fd_, "/etc/passwd", O_RDONLY|O_BENEATH);
EXPECT_OPENAT_FAIL_TRAVERSAL(sub_fd_, "/etc/passwd", O_RDONLY|O_BENEATH);
// Can't open paths starting with "/" with O_RESOLVE_BENEATH specified.
EXPECT_OPENAT_FAIL_TRAVERSAL(AT_FDCWD, "/etc/passwd", O_RDONLY|O_RESOLVE_BENEATH);
EXPECT_OPENAT_FAIL_TRAVERSAL(dir_fd_, "/etc/passwd", O_RDONLY|O_RESOLVE_BENEATH);
EXPECT_OPENAT_FAIL_TRAVERSAL(sub_fd_, "/etc/passwd", O_RDONLY|O_RESOLVE_BENEATH);
}
FORK_TEST_F(OpenatTest, WithFlagInCapabilityMode) {
EXPECT_OK(cap_enter()); // Enter capability mode
CheckPolicing(O_BENEATH);
CheckPolicing(O_RESOLVE_BENEATH);
}
#endif