On Fri, Oct 28, 2022 at 6:55 PM Roberto Sassu roberto.sassu@huaweicloud.com wrote:
From: Roberto Sassu roberto.sassu@huawei.com
include/linux/lsm_hooks.h reports the result of the LSM infrastructure to the callers, not what LSMs should return to the LSM infrastructure.
Clarify that and add that returning 1 from the LSMs means calling __vm_enough_memory() with cap_sys_admin set, 0 without.
Signed-off-by: Roberto Sassu roberto.sassu@huawei.com
Reviewed-by: KP Singh kpsingh@kernel.org
include/linux/lsm_hooks.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 4ec80b96c22e..f40b82ca91e7 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -1411,7 +1411,9 @@
Check permissions for allocating a new virtual mapping.@mm contains the mm struct it is being added to.@pages contains the number of pages.
Return 0 if permission is granted.
Return 0 if permission is granted by LSMs to the caller. LSMs should
return 1 if __vm_enough_memory() should be called with
cap_sys_admin set, 0 if not.- @ismaclabel:
Check if the extended attribute specified by @name-- 2.25.1