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authorPaul Moore <paul@paul-moore.com>2021-02-19 14:26:21 -0500
committerPaul Moore <paul@paul-moore.com>2021-03-22 15:23:32 -0400
commit4ebd7651bfc8992ba05b355a8036cb7fd0e8d7de (patch)
tree45821f7d0f427f69f0f4d2ce9f461ff92a16a37d /security/selinux
parentec1ade6a0448e3bfb07bb905aca1bc18836220c7 (diff)
lsm: separate security_task_getsecid() into subjective and objective variants
Of the three LSMs that implement the security_task_getsecid() LSM hook, all three LSMs provide the task's objective security credentials. This turns out to be unfortunate as most of the hook's callers seem to expect the task's subjective credentials, although a small handful of callers do correctly expect the objective credentials. This patch is the first step towards fixing the problem: it splits the existing security_task_getsecid() hook into two variants, one for the subjective creds, one for the objective creds. void security_task_getsecid_subj(struct task_struct *p, u32 *secid); void security_task_getsecid_obj(struct task_struct *p, u32 *secid); While this patch does fix all of the callers to use the correct variant, in order to keep this patch focused on the callers and to ease review, the LSMs continue to use the same implementation for both hooks. The net effect is that this patch should not change the behavior of the kernel in any way, it will be up to the latter LSM specific patches in this series to change the hook implementations and return the correct credentials. Acked-by: Mimi Zohar <zohar@linux.ibm.com> (IMA) Acked-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/hooks.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 07ca2ebf979e..327dbc3acefc 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -7205,7 +7205,8 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(task_setpgid, selinux_task_setpgid),
LSM_HOOK_INIT(task_getpgid, selinux_task_getpgid),
LSM_HOOK_INIT(task_getsid, selinux_task_getsid),
- LSM_HOOK_INIT(task_getsecid, selinux_task_getsecid),
+ LSM_HOOK_INIT(task_getsecid_subj, selinux_task_getsecid),
+ LSM_HOOK_INIT(task_getsecid_obj, selinux_task_getsecid),
LSM_HOOK_INIT(task_setnice, selinux_task_setnice),
LSM_HOOK_INIT(task_setioprio, selinux_task_setioprio),
LSM_HOOK_INIT(task_getioprio, selinux_task_getioprio),