xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

security: Add a cred_getsecid hook

Browse Source 
For IMA purposes, we want to be able to obtain the prepared secid in the
bprm structure before the credentials are committed. Add a cred_getsecid
hook that makes this possible.

Signed-off-by: Matthew Garrett <mjg59@google.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Matthew Garrett
2018-01-08 13:36:19 -08:00
committed by Mimi Zohar
parent 5893ed18a2
commit 3ec3011326
5 changed files with 38 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
security/selinux/hooks.c
View File

@@ -3844,6 +3844,11 @@ static void selinux_cred_transfer(struct cred *new, const struct cred *old)
*tsec = *old_tsec;
}
static void selinux_cred_getsecid(const struct cred *c, u32 *secid)
{
*secid = cred_sid(c);
}
/*
* set the security data for a kernel service
* - all the creation contexts are set to unlabelled
@@ -6482,6 +6487,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(cred_free, selinux_cred_free),
LSM_HOOK_INIT(cred_prepare, selinux_cred_prepare),
LSM_HOOK_INIT(cred_transfer, selinux_cred_transfer),
LSM_HOOK_INIT(cred_getsecid, selinux_cred_getsecid),
LSM_HOOK_INIT(kernel_act_as, selinux_kernel_act_as),
LSM_HOOK_INIT(kernel_create_files_as, selinux_kernel_create_files_as),
LSM_HOOK_INIT(kernel_module_request, selinux_kernel_module_request),