linux-stable/security/landlock
Mickaël Salaün 75c542d6c6
landlock: Reduce the maximum number of layers to 16
The maximum number of nested Landlock domains is currently 64.  Because
of the following fix and to help reduce the stack size, let's reduce it
to 16.  This seems large enough for a lot of use cases (e.g. sandboxed
init service, spawning a sandboxed SSH service, in nested sandboxed
containers).  Reducing the number of nested domains may also help to
discover misuse of Landlock (e.g. creating a domain per rule).

Add and use a dedicated layer_mask_t typedef to fit with the number of
layers.  This might be useful when changing it and to keep it consistent
with the maximum number of layers.

Reviewed-by: Paul Moore <paul@paul-moore.com>
Link: https://lore.kernel.org/r/20220506161102.525323-3-mic@digikod.net
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
2022-05-23 13:27:56 +02:00
..
common.h landlock: Set up the security framework and manage credentials 2021-04-22 12:22:10 -07:00
cred.c landlock: Format with clang-format 2022-05-09 12:31:10 +02:00
cred.h landlock: Format with clang-format 2022-05-09 12:31:10 +02:00
fs.c landlock: Reduce the maximum number of layers to 16 2022-05-23 13:27:56 +02:00
fs.h landlock: Define access_mask_t to enforce a consistent access mask size 2022-05-23 13:27:55 +02:00
Kconfig landlock: Support filesystem access-control 2021-04-22 12:22:11 -07:00
limits.h landlock: Reduce the maximum number of layers to 16 2022-05-23 13:27:56 +02:00
Makefile landlock: Add syscall implementations 2021-04-22 12:22:11 -07:00
object.c landlock: Format with clang-format 2022-05-09 12:31:10 +02:00
object.h landlock: Format with clang-format 2022-05-09 12:31:10 +02:00
ptrace.c landlock: Format with clang-format 2022-05-09 12:31:10 +02:00
ptrace.h landlock: Add ptrace restrictions 2021-04-22 12:22:10 -07:00
ruleset.c landlock: Define access_mask_t to enforce a consistent access mask size 2022-05-23 13:27:55 +02:00
ruleset.h landlock: Reduce the maximum number of layers to 16 2022-05-23 13:27:56 +02:00
setup.c landlock: Support filesystem access-control 2021-04-22 12:22:11 -07:00
setup.h landlock: Support filesystem access-control 2021-04-22 12:22:11 -07:00
syscalls.c landlock: Change landlock_restrict_self(2) check ordering 2022-05-23 13:27:51 +02:00