diff options
| author | Roberto Sassu <roberto.sassu@huawei.com> | 2022-11-28 17:42:39 +0300 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2022-12-07 01:11:37 +0300 |
| commit | 361dd63ed5f1103ff21e22408a142a7d40804527 (patch) | |
| tree | 4bf02d4c445180c5b32eff1192f11cacc48b34c2 /include/linux/lsm_hooks.h | |
| parent | 572302af1258459e124437b8f3369357447afac7 (diff) | |
| download | linux-361dd63ed5f1103ff21e22408a142a7d40804527.tar.xz | |
lsm: Clarify documentation of vm_enough_memory hook
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 if all LSMs return a positive value
__vm_enough_memory() will be called with cap_sys_admin set. If at least one
LSM returns 0 or negative, it will be called with cap_sys_admin cleared.
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'include/linux/lsm_hooks.h')
| -rw-r--r-- | include/linux/lsm_hooks.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 2831efebde69..c35e260efd8c 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -1398,7 +1398,11 @@ * 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 the LSM infrastructure to the + * caller. If all LSMs return a positive value, __vm_enough_memory() will + * be called with cap_sys_admin set. If at least one LSM returns 0 or + * negative, __vm_enough_memory() will be called with cap_sys_admin + * cleared. * * @ismaclabel: * Check if the extended attribute specified by @name |