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capsicum: Verify that openat("/", "..") fails with ENOTCAPABLE

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Add a regression test for a718431c30 ("lookup(): ensure that
openat("/", "..", O_RESOLVE_BENEATH) fails").

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mark Johnston 2023-04-25 09:54:47 -04:00
parent 8a271827e7
commit 2d252934da
1 changed files with 26 additions and 0 deletions
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26
tests/sys/vfs/lookup_cap_dotdot.c
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@ -233,6 +233,31 @@ ATF_TC_BODY(lookup_cap_dotdot__negative, tc)
ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, "../testdir/d1/f1", O_RDONLY) < 0);
}
ATF_TC(lookup_cap_dotdot__root);
ATF_TC_HEAD(lookup_cap_dotdot__root, tc)
{
atf_tc_set_md_var(tc, "descr", "Validate cap-mode /.. lookup fails");
}
ATF_TC_BODY(lookup_cap_dotdot__root, tc)
{
int dfd, dfd2;
check_capsicum();
dfd = open("/", O_DIRECTORY);
ATF_REQUIRE(dfd >= 0);
dfd2 = openat(dfd, "..", O_DIRECTORY);
ATF_REQUIRE(dfd2 >= 0);
ATF_REQUIRE(close(dfd2) == 0);
ATF_REQUIRE(cap_enter() >= 0);
dfd2 = openat(dfd, "..", O_DIRECTORY);
ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dfd, "..", O_DIRECTORY));
}
ATF_TP_ADD_TCS(tp)
{
@ -244,6 +269,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, lookup_cap_dotdot__basic);
ATF_TP_ADD_TC(tp, lookup_cap_dotdot__advanced);
ATF_TP_ADD_TC(tp, lookup_cap_dotdot__negative);
ATF_TP_ADD_TC(tp, lookup_cap_dotdot__root);
return (atf_no_error());
}