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Message-ID: <47ddb2ea-3bc7-533a-9b0d-2b2d3950644c@huawei.com> Date: Sat, 10 Sep 2022 23:51:46 +0300 From: "Konstantin Meskhidze (A)" <konstantin.meskhidze@...wei.com> To: Mickaël Salaün <mic@...ikod.net> CC: <willemdebruijn.kernel@...il.com>, <gnoack3000@...il.com>, <linux-security-module@...r.kernel.org>, <netdev@...r.kernel.org>, <netfilter-devel@...r.kernel.org>, <anton.sirazetdinov@...wei.com> Subject: Re: [PATCH v7 16/18] seltests/landlock: add invalid input data test 9/6/2022 11:09 AM, Mickaël Salaün пишет: > > On 29/08/2022 19:03, Konstantin Meskhidze wrote: >> This patch adds rules with invalid user space supplied data: >> - out of range ruleset attribute; >> - unhandled allowed access; >> - zero port value; >> - zero access value; >> >> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@...wei.com> >> --- >> >> Changes since v6: >> * Adds invalid ruleset attribute test. >> >> Changes since v5: >> * Formats code with clang-format-14. >> >> Changes since v4: >> * Refactors code with self->port variable. >> >> Changes since v3: >> * Adds inval test. >> >> --- >> tools/testing/selftests/landlock/net_test.c | 66 ++++++++++++++++++++- >> 1 file changed, 65 insertions(+), 1 deletion(-) >> >> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c >> index a93224d1521b..067ba45f58a5 100644 >> --- a/tools/testing/selftests/landlock/net_test.c >> +++ b/tools/testing/selftests/landlock/net_test.c >> @@ -26,9 +26,12 @@ >> >> #define IP_ADDRESS "127.0.0.1" >> >> -/* Number pending connections queue to be hold */ >> +/* Number pending connections queue to be hold. */ > > Patch of a previous patch? > > >> #define BACKLOG 10 >> >> +/* Invalid attribute, out of landlock network access range. */ >> +#define LANDLOCK_INVAL_ATTR 7 >> + >> FIXTURE(socket) >> { >> uint port[MAX_SOCKET_NUM]; >> @@ -719,4 +722,65 @@ TEST_F(socket, ruleset_expanding) >> /* Closes socket 1. */ >> ASSERT_EQ(0, close(sockfd_1)); >> } >> + >> +TEST_F(socket, inval) >> +{ >> + struct landlock_ruleset_attr ruleset_attr = { >> + .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP >> + }; >> + struct landlock_ruleset_attr ruleset_attr_inval = { >> + .handled_access_net = LANDLOCK_INVAL_ATTR > > Please add a test similar to TEST_F_FORK(layout1, > file_and_dir_access_rights) instead of explicitly defining and only > testing LANDLOCK_INVAL_ATTR. > Do you want fs test to be in this commit or maybe its better to add it into "[PATCH v7 01/18] landlock: rename access mask" one. > >> + }; >> + struct landlock_net_service_attr net_service_1 = { >> + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | >> + LANDLOCK_ACCESS_NET_CONNECT_TCP, >> + .port = self->port[0], >> + }; >> + struct landlock_net_service_attr net_service_2 = { >> + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, >> + .port = 0, >> + }; >> + struct landlock_net_service_attr net_service_3 = { >> + .allowed_access = 0, >> + .port = self->port[1], >> + }; >> + struct landlock_net_service_attr net_service_4 = { >> + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, >> + .port = self->port[2], >> + }; >> + >> + /* Checks invalid ruleset attribute. */ >> + const int ruleset_fd_inv = landlock_create_ruleset( >> + &ruleset_attr_inval, sizeof(ruleset_attr_inval), 0); >> + ASSERT_EQ(-1, ruleset_fd_inv); >> + ASSERT_EQ(EINVAL, errno); >> + >> + /* Gets ruleset. */ >> + const int ruleset_fd = >> + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); >> + ASSERT_LE(0, ruleset_fd); >> + >> + /* Checks unhandled allowed_access. */ >> + ASSERT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE, >> + &net_service_1, 0)); >> + ASSERT_EQ(EINVAL, errno); >> + >> + /* Checks zero port value. */ >> + ASSERT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE, >> + &net_service_2, 0)); >> + ASSERT_EQ(EINVAL, errno); >> + >> + /* Checks zero access value. */ >> + ASSERT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE, >> + &net_service_3, 0)); >> + ASSERT_EQ(ENOMSG, errno); >> + >> + /* Adds with legitimate values. */ >> + ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE, >> + &net_service_4, 0)); >> + >> + /* Enforces the ruleset. */ >> + enforce_ruleset(_metadata, ruleset_fd); >> + ASSERT_EQ(0, close(ruleset_fd)); >> +} >> TEST_HARNESS_MAIN >> -- >> 2.25.1 >> > .
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