diff options
Diffstat (limited to 'include/uapi/linux/landlock.h')
| -rw-r--r-- | include/uapi/linux/landlock.h | 67 |
1 files changed, 39 insertions, 28 deletions
diff --git a/include/uapi/linux/landlock.h b/include/uapi/linux/landlock.h index f030adc462ee..f88fa1f68b77 100644 --- a/include/uapi/linux/landlock.h +++ b/include/uapi/linux/landlock.h @@ -117,11 +117,24 @@ struct landlock_ruleset_attr { * 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. + * + * The following flag supports policy enforcement in multithreaded processes: + * + * %LANDLOCK_RESTRICT_SELF_TSYNC + * Applies the new Landlock configuration atomically to all threads of the + * current process, including the Landlock domain and logging + * configuration. This overrides the Landlock configuration of sibling + * threads, irrespective of previously established Landlock domains and + * logging configurations on these threads. + * + * If the calling thread is running with no_new_privs, this operation + * enables no_new_privs on the sibling threads as well. */ /* clang-format off */ #define LANDLOCK_RESTRICT_SELF_LOG_SAME_EXEC_OFF (1U << 0) #define LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON (1U << 1) #define LANDLOCK_RESTRICT_SELF_LOG_SUBDOMAINS_OFF (1U << 2) +#define LANDLOCK_RESTRICT_SELF_TSYNC (1U << 3) /* clang-format on */ /** @@ -182,11 +195,13 @@ struct landlock_net_port_attr { * It should be noted that port 0 passed to :manpage:`bind(2)` will bind * to an available port from the ephemeral port range. This can be * configured with the ``/proc/sys/net/ipv4/ip_local_port_range`` sysctl - * (also used for IPv6). + * (also used for IPv6), and within that range, on a per-socket basis + * with ``setsockopt(IP_LOCAL_PORT_RANGE)``. * - * A Landlock rule with port 0 and the ``LANDLOCK_ACCESS_NET_BIND_TCP`` + * A Landlock rule with port 0 and the %LANDLOCK_ACCESS_NET_BIND_TCP * right means that requesting to bind on port 0 is allowed and it will - * automatically translate to binding on the related port range. + * automatically translate to binding on a kernel-assigned ephemeral + * port. */ __u64 port; }; @@ -216,6 +231,23 @@ struct landlock_net_port_attr { * :manpage:`ftruncate(2)`, :manpage:`creat(2)`, or :manpage:`open(2)` with * ``O_TRUNC``. This access right is available since the third version of the * Landlock ABI. + * - %LANDLOCK_ACCESS_FS_IOCTL_DEV: Invoke :manpage:`ioctl(2)` commands on an opened + * character or block device. + * + * This access right applies to all `ioctl(2)` commands implemented by device + * drivers. However, the following common IOCTL commands continue to be + * invokable independent of the %LANDLOCK_ACCESS_FS_IOCTL_DEV right: + * + * * IOCTL commands targeting file descriptors (``FIOCLEX``, ``FIONCLEX``), + * * IOCTL commands targeting file descriptions (``FIONBIO``, ``FIOASYNC``), + * * IOCTL commands targeting file systems (``FIFREEZE``, ``FITHAW``, + * ``FIGETBSZ``, ``FS_IOC_GETFSUUID``, ``FS_IOC_GETFSSYSFSPATH``) + * * Some IOCTL commands which do not make sense when used with devices, but + * whose implementations are safe and return the right error codes + * (``FS_IOC_FIEMAP``, ``FICLONE``, ``FICLONERANGE``, ``FIDEDUPERANGE``) + * + * This access right is available since the fifth version of the Landlock + * ABI. * * 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 @@ -275,26 +307,6 @@ struct landlock_net_port_attr { * If multiple requirements are not met, the ``EACCES`` error code takes * precedence over ``EXDEV``. * - * The following access right applies both to files and directories: - * - * - %LANDLOCK_ACCESS_FS_IOCTL_DEV: Invoke :manpage:`ioctl(2)` commands on an opened - * character or block device. - * - * This access right applies to all `ioctl(2)` commands implemented by device - * drivers. However, the following common IOCTL commands continue to be - * invokable independent of the %LANDLOCK_ACCESS_FS_IOCTL_DEV right: - * - * * IOCTL commands targeting file descriptors (``FIOCLEX``, ``FIONCLEX``), - * * IOCTL commands targeting file descriptions (``FIONBIO``, ``FIOASYNC``), - * * IOCTL commands targeting file systems (``FIFREEZE``, ``FITHAW``, - * ``FIGETBSZ``, ``FS_IOC_GETFSUUID``, ``FS_IOC_GETFSSYSFSPATH``) - * * Some IOCTL commands which do not make sense when used with devices, but - * whose implementations are safe and return the right error codes - * (``FS_IOC_FIEMAP``, ``FICLONE``, ``FICLONERANGE``, ``FIDEDUPERANGE``) - * - * This access right is available since the fifth version of the Landlock - * ABI. - * * .. warning:: * * It is currently not possible to restrict some file-related actions @@ -332,13 +344,12 @@ struct landlock_net_port_attr { * These flags enable to restrict a sandboxed process to a set of network * actions. * - * This is supported since Landlock ABI version 4. - * * The following access rights apply to TCP port numbers: * - * - %LANDLOCK_ACCESS_NET_BIND_TCP: Bind a TCP socket to a local port. - * - %LANDLOCK_ACCESS_NET_CONNECT_TCP: Connect an active TCP socket to - * a remote port. + * - %LANDLOCK_ACCESS_NET_BIND_TCP: Bind TCP sockets to the given local + * port. Support added in Landlock ABI version 4. + * - %LANDLOCK_ACCESS_NET_CONNECT_TCP: Connect TCP sockets to the given + * remote port. Support added in Landlock ABI version 4. */ /* clang-format off */ #define LANDLOCK_ACCESS_NET_BIND_TCP (1ULL << 0) |