6/26/2023 9:41 PM, Mickaël Salaün пишет:
On 15/05/2023 18:13, Konstantin Meskhidze wrote:
This commit adds network rules support in the ruleset management
helpers and the landlock_create_ruleset syscall.
Refactor user space API to support network actions. Add new network
access flags, network rule and network attributes. Increment Landlock
ABI version. Expand access_masks_t to u32 to be sure network access
rights can be stored. Implement socket_bind() and socket_connect()
LSM hooks, which enables to restrict TCP socket binding and connection
to specific ports.
Co-developed-by: Mickaël Salaün <mic@xxxxxxxxxxx>
Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@xxxxxxxxxx>
---
Changes since v10:
* Removes "packed" attribute.
* Applies Mickaёl's patch with some refactoring.
* Deletes get_port() and check_addrlen() helpers.
* Refactors check_socket_access() by squashing get_port() and
check_addrlen() helpers into it.
* Fixes commit message.
Changes since v9:
* Changes UAPI port field to __u64.
* Moves shared code into check_socket_access().
* Adds get_raw_handled_net_accesses() and
get_current_net_domain() helpers.
* Minor fixes.
Changes since v8:
* Squashes commits.
* Refactors commit message.
* Changes UAPI port field to __be16.
* Changes logic of bind/connect hooks with AF_UNSPEC families.
* Adds address length checking.
* Minor fixes.
Changes since v7:
* Squashes commits.
* Increments ABI version to 4.
* Refactors commit message.
* Minor fixes.
Changes since v6:
* Renames landlock_set_net_access_mask() to landlock_add_net_access_mask()
because it OR values.
* Makes landlock_add_net_access_mask() more resilient incorrect values.
* Refactors landlock_get_net_access_mask().
* Renames LANDLOCK_MASK_SHIFT_NET to LANDLOCK_SHIFT_ACCESS_NET and use
LANDLOCK_NUM_ACCESS_FS as value.
* Updates access_masks_t to u32 to support network access actions.
* Refactors landlock internal functions to support network actions with
landlock_key/key_type/id types.
Changes since v5:
* Gets rid of partial revert from landlock_add_rule
syscall.
* Formats code with clang-format-14.
Changes since v4:
* Refactors landlock_create_ruleset() - splits ruleset and
masks checks.
* Refactors landlock_create_ruleset() and landlock mask
setters/getters to support two rule types.
* Refactors landlock_add_rule syscall add_rule_path_beneath
function by factoring out get_ruleset_from_fd() and
landlock_put_ruleset().
Changes since v3:
* Splits commit.
* Adds network rule support for internal landlock functions.
* Adds set_mask and get_mask for network.
* Adds rb_root root_net_port.
---
include/uapi/linux/landlock.h | 48 +++++
security/landlock/Kconfig | 1 +
security/landlock/Makefile | 2 +
security/landlock/limits.h | 6 +-
security/landlock/net.c | 174 +++++++++++++++++++
security/landlock/net.h | 26 +++
security/landlock/ruleset.c | 52 +++++-
security/landlock/ruleset.h | 63 +++++--
security/landlock/setup.c | 2 +
security/landlock/syscalls.c | 72 +++++++-
tools/testing/selftests/landlock/base_test.c | 2 +-
11 files changed, 425 insertions(+), 23 deletions(-)
create mode 100644 security/landlock/net.c
create mode 100644 security/landlock/net.h
[...]
diff --git a/security/landlock/net.c b/security/landlock/net.c
new file mode 100644
index 000000000000..f8d2be53ac0d
--- /dev/null
+++ b/security/landlock/net.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Landlock LSM - Network management and hooks
+ *
+ * Copyright © 2022 Huawei Tech. Co., Ltd.
+ * Copyright © 2022 Microsoft Corporation
You can replace these dates with "2022-2023", and same for all your
other "2022" I guess.
Ok. Thanks. I will change the dates.
.
