| Message ID | 20240904104824.1844082-4-ivanov.mikhail1@huawei-partners.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | Support socket access-control | expand |
On Wed, Sep 04, 2024 at 06:48:08PM +0800, Mikhail Ivanov wrote: > Initiate socket_test.c selftests. > > Add `protocol` fixture to test all possible family+type variants that > can be used to create user space socket. Add all options required by > this protocols in config. Support CAP_NET_RAW capability which is > required by some protocols. > > Add simple socket access right checking test. > > Signed-off-by: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com> > --- > Changes since v2: > * Extends variants of `protocol` fixture with every socket protocol > that can be used to create user space sockets. > * Adds `SYS_ADMIN`, `NET_ADMIN` and `NET_RAW` capabilities required for > some socket protocols. > * Removes network namespace creation in `protocol` fixture setup. > Sockets of some protocols can be created only in initial network > namespace. This shouldn't cause any issues until `protocol` fixture > is used in connection or binding tests. > * Extends config file with a set of options required by socket protocols. > * Adds CAP_NET_RAW capability to landlock selftests which is required > to create sockets of some protocols. > * Adds protocol field to the `protocol` fixture. > * Adds test_socket_variant() helper and changes the signature of > test_socket() helper. > * Checks socket(2) when ruleset is not established. > * Removes checks for AF_UNSPEC. This is moved to unsupported_af_and_prot > test. > * Removes `service_fixture` struct. > * Minor fixes. > * Refactors commit message and title. > > Changes since v1: > * Replaces test_socket_create() and socket_variant() helpers > with test_socket(). > * Renames domain to family in protocol fixture. > * Remove AF_UNSPEC fixture entry and add unspec_srv0 fixture field to > check AF_UNSPEC socket creation case. > * Formats code with clang-format. > * Refactors commit message. > --- > tools/testing/selftests/landlock/common.h | 1 + > tools/testing/selftests/landlock/config | 47 +++ > .../testing/selftests/landlock/socket_test.c | 297 ++++++++++++++++++ > 3 files changed, 345 insertions(+) > create mode 100644 tools/testing/selftests/landlock/socket_test.c > > diff --git a/tools/testing/selftests/landlock/common.h b/tools/testing/selftests/landlock/common.h > index 7e2b431b9f90..28df49fa22d5 100644 > --- a/tools/testing/selftests/landlock/common.h > +++ b/tools/testing/selftests/landlock/common.h > @@ -66,6 +66,7 @@ static void _init_caps(struct __test_metadata *const _metadata, bool drop_all) > CAP_NET_BIND_SERVICE, > CAP_SYS_ADMIN, > CAP_SYS_CHROOT, > + CAP_NET_RAW, > /* clang-format on */ > }; > const unsigned int noroot = SECBIT_NOROOT | SECBIT_NOROOT_LOCKED; > diff --git a/tools/testing/selftests/landlock/config b/tools/testing/selftests/landlock/config > index 29af19c4e9f9..0b8e906ca59b 100644 > --- a/tools/testing/selftests/landlock/config > +++ b/tools/testing/selftests/landlock/config > @@ -13,3 +13,50 @@ CONFIG_SHMEM=y > CONFIG_SYSFS=y > CONFIG_TMPFS=y > CONFIG_TMPFS_XATTR=y > + > +# > +# Support of socket protocols for socket_test > +# > +CONFIG_AF_KCM=y > +CONFIG_AF_RXRPC=y > +CONFIG_ATALK=y > +CONFIG_ATM=y > +CONFIG_AX25=y > +CONFIG_BPF_SYSCALL=y > +CONFIG_BT=y > +CONFIG_CAIF=y > +CONFIG_CAN_BCM=y > +CONFIG_CAN=y > +CONFIG_CRYPTO_USER_API_AEAD=y > +CONFIG_CRYPTO=y > +CONFIG_HAMRADIO=y > +CONFIG_IEEE802154_SOCKET=y > +CONFIG_IEEE802154=y > +CONFIG_INET=y > +CONFIG_INFINIBAND=y > +CONFIG_IP_SCTP=y > +CONFIG_ISDN=y > +CONFIG_LLC2=y > +CONFIG_LLC=y > +CONFIG_MCTP=y > +CONFIG_MISDN=y > +CONFIG_NETDEVICES=y > +CONFIG_NET_KEY=y > +CONFIG_NETROM=y > +CONFIG_NFC=y > +CONFIG_PACKET=y > +CONFIG_PCI=y > +CONFIG_PHONET=y > +CONFIG_PPPOE=y > +CONFIG_PPP=y > +CONFIG_QRTR=y > +CONFIG_RDS=y > +CONFIG_ROSE=y > +CONFIG_SMC=y > +CONFIG_TIPC=y > +CONFIG_UNIX=y > +CONFIG_VMWARE_VMCI_VSOCKETS=y > +CONFIG_VMWARE_VMCI=y > +CONFIG_VSOCKETS=y > +CONFIG_X25=y > +CONFIG_XDP_SOCKETS=y > \ No newline at end of file > diff --git a/tools/testing/selftests/landlock/socket_test.c b/tools/testing/selftests/landlock/socket_test.c > new file mode 100644 > index 000000000000..63bb269c9d07 > --- /dev/null > +++ b/tools/testing/selftests/landlock/socket_test.c > @@ -0,0 +1,297 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Landlock tests - Socket > + * > + * Copyright © 2024 Huawei Tech. Co., Ltd. > + */ > + > +#define _GNU_SOURCE > + > +#include <linux/landlock.h> > +#include <linux/pfkeyv2.h> > +#include <linux/kcm.h> > +#include <linux/can.h> > +#include <linux/in.h> > +#include <sys/prctl.h> > + > +#include "common.h" > + > +struct protocol_variant { > + int family; > + int type; > + int protocol; > +}; > + > +static int test_socket(int family, int type, int protocol) > +{ > + int fd; > + > + fd = socket(family, type | SOCK_CLOEXEC, protocol); > + if (fd < 0) > + return errno; > + /* > + * Mixing error codes from close(2) and socket(2) should not lead to any > + * (access type) confusion for this test. > + */ > + if (close(fd) != 0) > + return errno; > + return 0; > +} > + > +static int test_socket_variant(const struct protocol_variant *const prot) > +{ > + return test_socket(prot->family, prot->type, prot->protocol); > +} > + > +FIXTURE(protocol) > +{ > + struct protocol_variant prot; > +}; > + > +FIXTURE_VARIANT(protocol) > +{ > + const struct protocol_variant prot; > +}; > + > +FIXTURE_SETUP(protocol) > +{ > + disable_caps(_metadata); > + self->prot = variant->prot; > + > + /* > + * Some address families require this caps to be set > + * (e.g. AF_CAIF, AF_KEY). > + */ > + set_cap(_metadata, CAP_SYS_ADMIN); > + set_cap(_metadata, CAP_NET_ADMIN); > + set_cap(_metadata, CAP_NET_RAW); > +}; > + > +FIXTURE_TEARDOWN(protocol) > +{ > + clear_cap(_metadata, CAP_SYS_ADMIN); > + clear_cap(_metadata, CAP_NET_ADMIN); > + clear_cap(_metadata, CAP_NET_RAW); > +} > + > +#define PROTOCOL_VARIANT_EXT_ADD(family_, type_, protocol_) \ > + FIXTURE_VARIANT_ADD(protocol, family_##_##type_) \ > + { \ > + .prot = { \ > + .family = AF_##family_, \ > + .type = SOCK_##type_, \ > + .protocol = protocol_, \ > + }, \ > + } > + > +#define PROTOCOL_VARIANT_ADD(family, type) \ > + PROTOCOL_VARIANT_EXT_ADD(family, type, 0) > + > +/* > + * Every protocol that can be used to create socket using create() method > + * of net_proto_family structure is tested (e.g. this method is used to > + * create socket with socket(2)). > + * > + * List of address families that are not tested: > + * - AF_ASH, AF_SNA, AF_WANPIPE, AF_NETBEUI, AF_IPX, AF_DECNET, AF_ECONET > + * and AF_IRDA are not implemented in kernel. > + * - AF_BRIDGE, AF_MPLS can't be used for creating sockets. > + * - AF_SECURITY - pseudo AF (Cf. socket.h). > + * - AF_IB is reserved by infiniband. > + */ > + > +/* Cf. unix_create */ > +PROTOCOL_VARIANT_ADD(UNIX, STREAM); > +PROTOCOL_VARIANT_ADD(UNIX, RAW); > +PROTOCOL_VARIANT_ADD(UNIX, DGRAM); > +PROTOCOL_VARIANT_ADD(UNIX, SEQPACKET); > + > +/* Cf. inet_create */ > +PROTOCOL_VARIANT_ADD(INET, STREAM); > +PROTOCOL_VARIANT_ADD(INET, DGRAM); > +PROTOCOL_VARIANT_EXT_ADD(INET, RAW, IPPROTO_TCP); > +PROTOCOL_VARIANT_EXT_ADD(INET, SEQPACKET, IPPROTO_SCTP); > + > +/* Cf. ax25_create */ > +PROTOCOL_VARIANT_ADD(AX25, DGRAM); > +PROTOCOL_VARIANT_ADD(AX25, SEQPACKET); > +PROTOCOL_VARIANT_ADD(AX25, RAW); > + > +/* Cf. atalk_create */ > +PROTOCOL_VARIANT_ADD(APPLETALK, RAW); > +PROTOCOL_VARIANT_ADD(APPLETALK, DGRAM); > + > +/* Cf. nr_create */ > +PROTOCOL_VARIANT_ADD(NETROM, SEQPACKET); > + > +/* Cf. pvc_create */ > +PROTOCOL_VARIANT_ADD(ATMPVC, DGRAM); > +PROTOCOL_VARIANT_ADD(ATMPVC, RAW); > +PROTOCOL_VARIANT_ADD(ATMPVC, RDM); > +PROTOCOL_VARIANT_ADD(ATMPVC, SEQPACKET); > +PROTOCOL_VARIANT_ADD(ATMPVC, DCCP); > +PROTOCOL_VARIANT_ADD(ATMPVC, PACKET); > + > +/* Cf. x25_create */ > +PROTOCOL_VARIANT_ADD(X25, SEQPACKET); > + > +/* Cf. inet6_create */ > +PROTOCOL_VARIANT_ADD(INET6, STREAM); > +PROTOCOL_VARIANT_ADD(INET6, DGRAM); > +PROTOCOL_VARIANT_EXT_ADD(INET6, RAW, IPPROTO_TCP); > + > +/* Cf. rose_create */ > +PROTOCOL_VARIANT_ADD(ROSE, SEQPACKET); > + > +/* Cf. pfkey_create */ > +PROTOCOL_VARIANT_EXT_ADD(KEY, RAW, PF_KEY_V2); > + > +/* Cf. netlink_create */ > +PROTOCOL_VARIANT_ADD(NETLINK, RAW); > +PROTOCOL_VARIANT_ADD(NETLINK, DGRAM); > + > +/* Cf. packet_create */ > +PROTOCOL_VARIANT_ADD(PACKET, DGRAM); > +PROTOCOL_VARIANT_ADD(PACKET, RAW); > +PROTOCOL_VARIANT_ADD(PACKET, PACKET); > + > +/* Cf. svc_create */ > +PROTOCOL_VARIANT_ADD(ATMSVC, DGRAM); > +PROTOCOL_VARIANT_ADD(ATMSVC, RAW); > +PROTOCOL_VARIANT_ADD(ATMSVC, RDM); > +PROTOCOL_VARIANT_ADD(ATMSVC, SEQPACKET); > +PROTOCOL_VARIANT_ADD(ATMSVC, DCCP); > +PROTOCOL_VARIANT_ADD(ATMSVC, PACKET); > + > +/* Cf. rds_create */ > +PROTOCOL_VARIANT_ADD(RDS, SEQPACKET); > + > +/* Cf. pppox_create + pppoe_create */ > +PROTOCOL_VARIANT_ADD(PPPOX, STREAM); > +PROTOCOL_VARIANT_ADD(PPPOX, DGRAM); > +PROTOCOL_VARIANT_ADD(PPPOX, RAW); > +PROTOCOL_VARIANT_ADD(PPPOX, RDM); > +PROTOCOL_VARIANT_ADD(PPPOX, SEQPACKET); > +PROTOCOL_VARIANT_ADD(PPPOX, DCCP); > +PROTOCOL_VARIANT_ADD(PPPOX, PACKET); > + > +/* Cf. llc_ui_create */ > +PROTOCOL_VARIANT_ADD(LLC, DGRAM); > +PROTOCOL_VARIANT_ADD(LLC, STREAM); > + > +/* Cf. can_create */ > +PROTOCOL_VARIANT_EXT_ADD(CAN, DGRAM, CAN_BCM); > + > +/* Cf. tipc_sk_create */ > +PROTOCOL_VARIANT_ADD(TIPC, STREAM); > +PROTOCOL_VARIANT_ADD(TIPC, SEQPACKET); > +PROTOCOL_VARIANT_ADD(TIPC, DGRAM); > +PROTOCOL_VARIANT_ADD(TIPC, RDM); > + > +/* Cf. l2cap_sock_create */ > +#ifndef __s390x__ > +PROTOCOL_VARIANT_ADD(BLUETOOTH, SEQPACKET); > +PROTOCOL_VARIANT_ADD(BLUETOOTH, STREAM); > +PROTOCOL_VARIANT_ADD(BLUETOOTH, DGRAM); > +PROTOCOL_VARIANT_ADD(BLUETOOTH, RAW); > +#endif > + > +/* Cf. iucv_sock_create */ > +#ifdef __s390x__ > +PROTOCOL_VARIANT_ADD(IUCV, STREAM); > +PROTOCOL_VARIANT_ADD(IUCV, SEQPACKET); > +#endif > + > +/* Cf. rxrpc_create */ > +PROTOCOL_VARIANT_EXT_ADD(RXRPC, DGRAM, PF_INET); > + > +/* Cf. mISDN_sock_create */ > +#define ISDN_P_BASE 0 /* Cf. linux/mISDNif.h */ > +#define ISDN_P_TE_S0 0x01 /* Cf. linux/mISDNif.h */ > +PROTOCOL_VARIANT_EXT_ADD(ISDN, RAW, ISDN_P_BASE); > +PROTOCOL_VARIANT_EXT_ADD(ISDN, DGRAM, ISDN_P_TE_S0); > + > +/* Cf. pn_socket_create */ > +PROTOCOL_VARIANT_ADD(PHONET, DGRAM); > +PROTOCOL_VARIANT_ADD(PHONET, SEQPACKET); > + > +/* Cf. ieee802154_create */ > +PROTOCOL_VARIANT_ADD(IEEE802154, RAW); > +PROTOCOL_VARIANT_ADD(IEEE802154, DGRAM); > + > +/* Cf. caif_create */ > +PROTOCOL_VARIANT_ADD(CAIF, SEQPACKET); > +PROTOCOL_VARIANT_ADD(CAIF, STREAM); > + > +/* Cf. alg_create */ > +PROTOCOL_VARIANT_ADD(ALG, SEQPACKET); > + > +/* Cf. nfc_sock_create + rawsock_create */ > +PROTOCOL_VARIANT_ADD(NFC, SEQPACKET); > + > +/* Cf. vsock_create */ > +#if defined(__x86_64__) || defined(__aarch64__) > +PROTOCOL_VARIANT_ADD(VSOCK, DGRAM); > +PROTOCOL_VARIANT_ADD(VSOCK, STREAM); > +PROTOCOL_VARIANT_ADD(VSOCK, SEQPACKET); > +#endif > + > +/* Cf. kcm_create */ > +PROTOCOL_VARIANT_EXT_ADD(KCM, DGRAM, KCMPROTO_CONNECTED); > +PROTOCOL_VARIANT_EXT_ADD(KCM, SEQPACKET, KCMPROTO_CONNECTED); > + > +/* Cf. qrtr_create */ > +PROTOCOL_VARIANT_ADD(QIPCRTR, DGRAM); > + > +/* Cf. smc_create */ > +#ifndef __alpha__ > +PROTOCOL_VARIANT_ADD(SMC, STREAM); > +#endif > + > +/* Cf. xsk_create */ > +PROTOCOL_VARIANT_ADD(XDP, RAW); > + > +/* Cf. mctp_pf_create */ > +PROTOCOL_VARIANT_ADD(MCTP, DGRAM); > + > +TEST_F(protocol, create) > +{ > + const struct landlock_ruleset_attr ruleset_attr = { > + .handled_access_socket = LANDLOCK_ACCESS_SOCKET_CREATE, > + }; > + const struct landlock_socket_attr create_socket_attr = { > + .allowed_access = LANDLOCK_ACCESS_SOCKET_CREATE, > + .family = self->prot.family, > + .type = self->prot.type, > + }; > + int ruleset_fd; > + > + /* Tries to create a socket when ruleset is not established. */ > + ASSERT_EQ(0, test_socket_variant(&self->prot)); > + > + ruleset_fd = > + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); > + ASSERT_LE(0, ruleset_fd); > + > + ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_SOCKET, > + &create_socket_attr, 0)); > + > + enforce_ruleset(_metadata, ruleset_fd); > + ASSERT_EQ(0, close(ruleset_fd)); > + > + /* Tries to create a socket when protocol is allowed. */ > + EXPECT_EQ(0, test_socket_variant(&self->prot)); > + > + /* Denied create. */ > + ruleset_fd = > + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); > + ASSERT_LE(0, ruleset_fd); > + > + enforce_ruleset(_metadata, ruleset_fd); > + ASSERT_EQ(0, close(ruleset_fd)); > + > + /* Tries to create a socket when protocol is restricted. */ > + EXPECT_EQ(EACCES, test_socket_variant(&self->prot)); > +} > + > +TEST_HARNESS_MAIN > -- > 2.34.1 > Reviewed-by: Günther Noack <gnoack@google.com>
diff --git a/tools/testing/selftests/landlock/common.h b/tools/testing/selftests/landlock/common.h index 7e2b431b9f90..28df49fa22d5 100644 --- a/tools/testing/selftests/landlock/common.h +++ b/tools/testing/selftests/landlock/common.h @@ -66,6 +66,7 @@ static void _init_caps(struct __test_metadata *const _metadata, bool drop_all) CAP_NET_BIND_SERVICE, CAP_SYS_ADMIN, CAP_SYS_CHROOT, + CAP_NET_RAW, /* clang-format on */ }; const unsigned int noroot = SECBIT_NOROOT | SECBIT_NOROOT_LOCKED; diff --git a/tools/testing/selftests/landlock/config b/tools/testing/selftests/landlock/config index 29af19c4e9f9..0b8e906ca59b 100644 --- a/tools/testing/selftests/landlock/config +++ b/tools/testing/selftests/landlock/config @@ -13,3 +13,50 @@ CONFIG_SHMEM=y CONFIG_SYSFS=y CONFIG_TMPFS=y CONFIG_TMPFS_XATTR=y + +# +# Support of socket protocols for socket_test +# +CONFIG_AF_KCM=y +CONFIG_AF_RXRPC=y +CONFIG_ATALK=y +CONFIG_ATM=y +CONFIG_AX25=y +CONFIG_BPF_SYSCALL=y +CONFIG_BT=y +CONFIG_CAIF=y +CONFIG_CAN_BCM=y +CONFIG_CAN=y +CONFIG_CRYPTO_USER_API_AEAD=y +CONFIG_CRYPTO=y +CONFIG_HAMRADIO=y +CONFIG_IEEE802154_SOCKET=y +CONFIG_IEEE802154=y +CONFIG_INET=y +CONFIG_INFINIBAND=y +CONFIG_IP_SCTP=y +CONFIG_ISDN=y +CONFIG_LLC2=y +CONFIG_LLC=y +CONFIG_MCTP=y +CONFIG_MISDN=y +CONFIG_NETDEVICES=y +CONFIG_NET_KEY=y +CONFIG_NETROM=y +CONFIG_NFC=y +CONFIG_PACKET=y +CONFIG_PCI=y +CONFIG_PHONET=y +CONFIG_PPPOE=y +CONFIG_PPP=y +CONFIG_QRTR=y +CONFIG_RDS=y +CONFIG_ROSE=y +CONFIG_SMC=y +CONFIG_TIPC=y +CONFIG_UNIX=y +CONFIG_VMWARE_VMCI_VSOCKETS=y +CONFIG_VMWARE_VMCI=y +CONFIG_VSOCKETS=y +CONFIG_X25=y +CONFIG_XDP_SOCKETS=y \ No newline at end of file diff --git a/tools/testing/selftests/landlock/socket_test.c b/tools/testing/selftests/landlock/socket_test.c new file mode 100644 index 000000000000..63bb269c9d07 --- /dev/null +++ b/tools/testing/selftests/landlock/socket_test.c @@ -0,0 +1,297 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Landlock tests - Socket + * + * Copyright © 2024 Huawei Tech. Co., Ltd. + */ + +#define _GNU_SOURCE + +#include <linux/landlock.h> +#include <linux/pfkeyv2.h> +#include <linux/kcm.h> +#include <linux/can.h> +#include <linux/in.h> +#include <sys/prctl.h> + +#include "common.h" + +struct protocol_variant { + int family; + int type; + int protocol; +}; + +static int test_socket(int family, int type, int protocol) +{ + int fd; + + fd = socket(family, type | SOCK_CLOEXEC, protocol); + if (fd < 0) + return errno; + /* + * Mixing error codes from close(2) and socket(2) should not lead to any + * (access type) confusion for this test. + */ + if (close(fd) != 0) + return errno; + return 0; +} + +static int test_socket_variant(const struct protocol_variant *const prot) +{ + return test_socket(prot->family, prot->type, prot->protocol); +} + +FIXTURE(protocol) +{ + struct protocol_variant prot; +}; + +FIXTURE_VARIANT(protocol) +{ + const struct protocol_variant prot; +}; + +FIXTURE_SETUP(protocol) +{ + disable_caps(_metadata); + self->prot = variant->prot; + + /* + * Some address families require this caps to be set + * (e.g. AF_CAIF, AF_KEY). + */ + set_cap(_metadata, CAP_SYS_ADMIN); + set_cap(_metadata, CAP_NET_ADMIN); + set_cap(_metadata, CAP_NET_RAW); +}; + +FIXTURE_TEARDOWN(protocol) +{ + clear_cap(_metadata, CAP_SYS_ADMIN); + clear_cap(_metadata, CAP_NET_ADMIN); + clear_cap(_metadata, CAP_NET_RAW); +} + +#define PROTOCOL_VARIANT_EXT_ADD(family_, type_, protocol_) \ + FIXTURE_VARIANT_ADD(protocol, family_##_##type_) \ + { \ + .prot = { \ + .family = AF_##family_, \ + .type = SOCK_##type_, \ + .protocol = protocol_, \ + }, \ + } + +#define PROTOCOL_VARIANT_ADD(family, type) \ + PROTOCOL_VARIANT_EXT_ADD(family, type, 0) + +/* + * Every protocol that can be used to create socket using create() method + * of net_proto_family structure is tested (e.g. this method is used to + * create socket with socket(2)). + * + * List of address families that are not tested: + * - AF_ASH, AF_SNA, AF_WANPIPE, AF_NETBEUI, AF_IPX, AF_DECNET, AF_ECONET + * and AF_IRDA are not implemented in kernel. + * - AF_BRIDGE, AF_MPLS can't be used for creating sockets. + * - AF_SECURITY - pseudo AF (Cf. socket.h). + * - AF_IB is reserved by infiniband. + */ + +/* Cf. unix_create */ +PROTOCOL_VARIANT_ADD(UNIX, STREAM); +PROTOCOL_VARIANT_ADD(UNIX, RAW); +PROTOCOL_VARIANT_ADD(UNIX, DGRAM); +PROTOCOL_VARIANT_ADD(UNIX, SEQPACKET); + +/* Cf. inet_create */ +PROTOCOL_VARIANT_ADD(INET, STREAM); +PROTOCOL_VARIANT_ADD(INET, DGRAM); +PROTOCOL_VARIANT_EXT_ADD(INET, RAW, IPPROTO_TCP); +PROTOCOL_VARIANT_EXT_ADD(INET, SEQPACKET, IPPROTO_SCTP); + +/* Cf. ax25_create */ +PROTOCOL_VARIANT_ADD(AX25, DGRAM); +PROTOCOL_VARIANT_ADD(AX25, SEQPACKET); +PROTOCOL_VARIANT_ADD(AX25, RAW); + +/* Cf. atalk_create */ +PROTOCOL_VARIANT_ADD(APPLETALK, RAW); +PROTOCOL_VARIANT_ADD(APPLETALK, DGRAM); + +/* Cf. nr_create */ +PROTOCOL_VARIANT_ADD(NETROM, SEQPACKET); + +/* Cf. pvc_create */ +PROTOCOL_VARIANT_ADD(ATMPVC, DGRAM); +PROTOCOL_VARIANT_ADD(ATMPVC, RAW); +PROTOCOL_VARIANT_ADD(ATMPVC, RDM); +PROTOCOL_VARIANT_ADD(ATMPVC, SEQPACKET); +PROTOCOL_VARIANT_ADD(ATMPVC, DCCP); +PROTOCOL_VARIANT_ADD(ATMPVC, PACKET); + +/* Cf. x25_create */ +PROTOCOL_VARIANT_ADD(X25, SEQPACKET); + +/* Cf. inet6_create */ +PROTOCOL_VARIANT_ADD(INET6, STREAM); +PROTOCOL_VARIANT_ADD(INET6, DGRAM); +PROTOCOL_VARIANT_EXT_ADD(INET6, RAW, IPPROTO_TCP); + +/* Cf. rose_create */ +PROTOCOL_VARIANT_ADD(ROSE, SEQPACKET); + +/* Cf. pfkey_create */ +PROTOCOL_VARIANT_EXT_ADD(KEY, RAW, PF_KEY_V2); + +/* Cf. netlink_create */ +PROTOCOL_VARIANT_ADD(NETLINK, RAW); +PROTOCOL_VARIANT_ADD(NETLINK, DGRAM); + +/* Cf. packet_create */ +PROTOCOL_VARIANT_ADD(PACKET, DGRAM); +PROTOCOL_VARIANT_ADD(PACKET, RAW); +PROTOCOL_VARIANT_ADD(PACKET, PACKET); + +/* Cf. svc_create */ +PROTOCOL_VARIANT_ADD(ATMSVC, DGRAM); +PROTOCOL_VARIANT_ADD(ATMSVC, RAW); +PROTOCOL_VARIANT_ADD(ATMSVC, RDM); +PROTOCOL_VARIANT_ADD(ATMSVC, SEQPACKET); +PROTOCOL_VARIANT_ADD(ATMSVC, DCCP); +PROTOCOL_VARIANT_ADD(ATMSVC, PACKET); + +/* Cf. rds_create */ +PROTOCOL_VARIANT_ADD(RDS, SEQPACKET); + +/* Cf. pppox_create + pppoe_create */ +PROTOCOL_VARIANT_ADD(PPPOX, STREAM); +PROTOCOL_VARIANT_ADD(PPPOX, DGRAM); +PROTOCOL_VARIANT_ADD(PPPOX, RAW); +PROTOCOL_VARIANT_ADD(PPPOX, RDM); +PROTOCOL_VARIANT_ADD(PPPOX, SEQPACKET); +PROTOCOL_VARIANT_ADD(PPPOX, DCCP); +PROTOCOL_VARIANT_ADD(PPPOX, PACKET); + +/* Cf. llc_ui_create */ +PROTOCOL_VARIANT_ADD(LLC, DGRAM); +PROTOCOL_VARIANT_ADD(LLC, STREAM); + +/* Cf. can_create */ +PROTOCOL_VARIANT_EXT_ADD(CAN, DGRAM, CAN_BCM); + +/* Cf. tipc_sk_create */ +PROTOCOL_VARIANT_ADD(TIPC, STREAM); +PROTOCOL_VARIANT_ADD(TIPC, SEQPACKET); +PROTOCOL_VARIANT_ADD(TIPC, DGRAM); +PROTOCOL_VARIANT_ADD(TIPC, RDM); + +/* Cf. l2cap_sock_create */ +#ifndef __s390x__ +PROTOCOL_VARIANT_ADD(BLUETOOTH, SEQPACKET); +PROTOCOL_VARIANT_ADD(BLUETOOTH, STREAM); +PROTOCOL_VARIANT_ADD(BLUETOOTH, DGRAM); +PROTOCOL_VARIANT_ADD(BLUETOOTH, RAW); +#endif + +/* Cf. iucv_sock_create */ +#ifdef __s390x__ +PROTOCOL_VARIANT_ADD(IUCV, STREAM); +PROTOCOL_VARIANT_ADD(IUCV, SEQPACKET); +#endif + +/* Cf. rxrpc_create */ +PROTOCOL_VARIANT_EXT_ADD(RXRPC, DGRAM, PF_INET); + +/* Cf. mISDN_sock_create */ +#define ISDN_P_BASE 0 /* Cf. linux/mISDNif.h */ +#define ISDN_P_TE_S0 0x01 /* Cf. linux/mISDNif.h */ +PROTOCOL_VARIANT_EXT_ADD(ISDN, RAW, ISDN_P_BASE); +PROTOCOL_VARIANT_EXT_ADD(ISDN, DGRAM, ISDN_P_TE_S0); + +/* Cf. pn_socket_create */ +PROTOCOL_VARIANT_ADD(PHONET, DGRAM); +PROTOCOL_VARIANT_ADD(PHONET, SEQPACKET); + +/* Cf. ieee802154_create */ +PROTOCOL_VARIANT_ADD(IEEE802154, RAW); +PROTOCOL_VARIANT_ADD(IEEE802154, DGRAM); + +/* Cf. caif_create */ +PROTOCOL_VARIANT_ADD(CAIF, SEQPACKET); +PROTOCOL_VARIANT_ADD(CAIF, STREAM); + +/* Cf. alg_create */ +PROTOCOL_VARIANT_ADD(ALG, SEQPACKET); + +/* Cf. nfc_sock_create + rawsock_create */ +PROTOCOL_VARIANT_ADD(NFC, SEQPACKET); + +/* Cf. vsock_create */ +#if defined(__x86_64__) || defined(__aarch64__) +PROTOCOL_VARIANT_ADD(VSOCK, DGRAM); +PROTOCOL_VARIANT_ADD(VSOCK, STREAM); +PROTOCOL_VARIANT_ADD(VSOCK, SEQPACKET); +#endif + +/* Cf. kcm_create */ +PROTOCOL_VARIANT_EXT_ADD(KCM, DGRAM, KCMPROTO_CONNECTED); +PROTOCOL_VARIANT_EXT_ADD(KCM, SEQPACKET, KCMPROTO_CONNECTED); + +/* Cf. qrtr_create */ +PROTOCOL_VARIANT_ADD(QIPCRTR, DGRAM); + +/* Cf. smc_create */ +#ifndef __alpha__ +PROTOCOL_VARIANT_ADD(SMC, STREAM); +#endif + +/* Cf. xsk_create */ +PROTOCOL_VARIANT_ADD(XDP, RAW); + +/* Cf. mctp_pf_create */ +PROTOCOL_VARIANT_ADD(MCTP, DGRAM); + +TEST_F(protocol, create) +{ + const struct landlock_ruleset_attr ruleset_attr = { + .handled_access_socket = LANDLOCK_ACCESS_SOCKET_CREATE, + }; + const struct landlock_socket_attr create_socket_attr = { + .allowed_access = LANDLOCK_ACCESS_SOCKET_CREATE, + .family = self->prot.family, + .type = self->prot.type, + }; + int ruleset_fd; + + /* Tries to create a socket when ruleset is not established. */ + ASSERT_EQ(0, test_socket_variant(&self->prot)); + + ruleset_fd = + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); + ASSERT_LE(0, ruleset_fd); + + ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_SOCKET, + &create_socket_attr, 0)); + + enforce_ruleset(_metadata, ruleset_fd); + ASSERT_EQ(0, close(ruleset_fd)); + + /* Tries to create a socket when protocol is allowed. */ + EXPECT_EQ(0, test_socket_variant(&self->prot)); + + /* Denied create. */ + ruleset_fd = + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); + ASSERT_LE(0, ruleset_fd); + + enforce_ruleset(_metadata, ruleset_fd); + ASSERT_EQ(0, close(ruleset_fd)); + + /* Tries to create a socket when protocol is restricted. */ + EXPECT_EQ(EACCES, test_socket_variant(&self->prot)); +} + +TEST_HARNESS_MAIN
Initiate socket_test.c selftests. Add `protocol` fixture to test all possible family+type variants that can be used to create user space socket. Add all options required by this protocols in config. Support CAP_NET_RAW capability which is required by some protocols. Add simple socket access right checking test. Signed-off-by: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com> --- Changes since v2: * Extends variants of `protocol` fixture with every socket protocol that can be used to create user space sockets. * Adds `SYS_ADMIN`, `NET_ADMIN` and `NET_RAW` capabilities required for some socket protocols. * Removes network namespace creation in `protocol` fixture setup. Sockets of some protocols can be created only in initial network namespace. This shouldn't cause any issues until `protocol` fixture is used in connection or binding tests. * Extends config file with a set of options required by socket protocols. * Adds CAP_NET_RAW capability to landlock selftests which is required to create sockets of some protocols. * Adds protocol field to the `protocol` fixture. * Adds test_socket_variant() helper and changes the signature of test_socket() helper. * Checks socket(2) when ruleset is not established. * Removes checks for AF_UNSPEC. This is moved to unsupported_af_and_prot test. * Removes `service_fixture` struct. * Minor fixes. * Refactors commit message and title. Changes since v1: * Replaces test_socket_create() and socket_variant() helpers with test_socket(). * Renames domain to family in protocol fixture. * Remove AF_UNSPEC fixture entry and add unspec_srv0 fixture field to check AF_UNSPEC socket creation case. * Formats code with clang-format. * Refactors commit message. --- tools/testing/selftests/landlock/common.h | 1 + tools/testing/selftests/landlock/config | 47 +++ .../testing/selftests/landlock/socket_test.c | 297 ++++++++++++++++++ 3 files changed, 345 insertions(+) create mode 100644 tools/testing/selftests/landlock/socket_test.c