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-rw-r--r--security/selinux/hooks.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index c3bb31ecc5aa..134a9c0d2004 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3233,6 +3233,21 @@ static int selinux_task_create(unsigned long clone_flags)
}
/*
+ * allocate the SELinux part of blank credentials
+ */
+static int selinux_cred_alloc_blank(struct cred *cred, gfp_t gfp)
+{
+ struct task_security_struct *tsec;
+
+ tsec = kzalloc(sizeof(struct task_security_struct), gfp);
+ if (!tsec)
+ return -ENOMEM;
+
+ cred->security = tsec;
+ return 0;
+}
+
+/*
* detach and free the LSM part of a set of credentials
*/
static void selinux_cred_free(struct cred *cred)
@@ -3264,6 +3279,17 @@ static int selinux_cred_prepare(struct cred *new, const struct cred *old,
}
/*
+ * transfer the SELinux data to a blank set of creds
+ */
+static void selinux_cred_transfer(struct cred *new, const struct cred *old)
+{
+ const struct task_security_struct *old_tsec = old->security;
+ struct task_security_struct *tsec = new->security;
+
+ *tsec = *old_tsec;
+}
+
+/*
* set the security data for a kernel service
* - all the creation contexts are set to unlabelled
*/
@@ -5469,8 +5495,10 @@ static struct security_operations selinux_ops = {
.dentry_open = selinux_dentry_open,
.task_create = selinux_task_create,
+ .cred_alloc_blank = selinux_cred_alloc_blank,
.cred_free = selinux_cred_free,
.cred_prepare = selinux_cred_prepare,
+ .cred_transfer = selinux_cred_transfer,
.kernel_act_as = selinux_kernel_act_as,
.kernel_create_files_as = selinux_kernel_create_files_as,
.kernel_module_request = selinux_kernel_module_request,