diff options
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/landlock.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/include/uapi/linux/landlock.h b/include/uapi/linux/landlock.h index f88fa1f68b77..10a346e55e95 100644 --- a/include/uapi/linux/landlock.h +++ b/include/uapi/linux/landlock.h @@ -116,7 +116,9 @@ struct landlock_ruleset_attr { * ``LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF``, this flag only affects * future nested domains, not the one being created. It can also be used * with a @ruleset_fd value of -1 to mute subdomain logs without creating a - * domain. + * domain. When combined with %LANDLOCK_RESTRICT_SELF_TSYNC and a + * @ruleset_fd value of -1, this configuration is propagated to all threads + * of the current process. * * The following flag supports policy enforcement in multithreaded processes: * @@ -248,6 +250,26 @@ struct landlock_net_port_attr { * * This access right is available since the fifth version of the Landlock * ABI. + * - %LANDLOCK_ACCESS_FS_RESOLVE_UNIX: Look up pathname UNIX domain sockets + * (:manpage:`unix(7)`). On UNIX domain sockets, this restricts both calls to + * :manpage:`connect(2)` as well as calls to :manpage:`sendmsg(2)` with an + * explicit recipient address. + * + * This access right only applies to connections to UNIX server sockets which + * were created outside of the newly created Landlock domain (e.g. from within + * a parent domain or from an unrestricted process). Newly created UNIX + * servers within the same Landlock domain continue to be accessible. In this + * regard, %LANDLOCK_ACCESS_FS_RESOLVE_UNIX has the same semantics as the + * ``LANDLOCK_SCOPE_*`` flags. + * + * If a resolve attempt is denied, the operation returns an ``EACCES`` error, + * in line with other filesystem access rights (but different to denials for + * abstract UNIX domain sockets). + * + * This access right is available since the ninth version of the Landlock ABI. + * + * The rationale for this design is described in + * :ref:`Documentation/security/landlock.rst <scoped-flags-interaction>`. * * Whether an opened file can be truncated with :manpage:`ftruncate(2)` or used * with `ioctl(2)` is determined during :manpage:`open(2)`, in the same way as @@ -333,6 +355,7 @@ struct landlock_net_port_attr { #define LANDLOCK_ACCESS_FS_REFER (1ULL << 13) #define LANDLOCK_ACCESS_FS_TRUNCATE (1ULL << 14) #define LANDLOCK_ACCESS_FS_IOCTL_DEV (1ULL << 15) +#define LANDLOCK_ACCESS_FS_RESOLVE_UNIX (1ULL << 16) /* clang-format on */ /** |