[PATCH 2/8] cred: add kernel_cred() helper

[Christian Brauner <brauner@kernel.org>]

Access kernel creds based off of init_task. This will let us avoid any
direct access to init_cred.

Link: https://patch.msgid.link/20251031-work-creds-init_cred-v1-1-cbf0400d6e0e@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 include/linux/cred.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 89ae50ad2ace..8ab3718184ad 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -20,6 +20,8 @@
 struct cred;
 struct inode;
 
+extern struct task_struct init_task;
+
 /*
  * COW Supplementary groups list
  */
@@ -156,6 +158,11 @@ extern struct cred *prepare_exec_creds(void);
 extern int commit_creds(struct cred *);
 extern void abort_creds(struct cred *);
 extern struct cred *prepare_kernel_cred(struct task_struct *);
+static inline const struct cred *kernel_cred(void)
+{
+	/* shut up sparse */
+	return rcu_dereference_raw(init_task.cred);
+}
 extern int set_security_override(struct cred *, u32);
 extern int set_security_override_from_ctx(struct cred *, const char *);
 extern int set_create_files_as(struct cred *, struct inode *);

-- 
2.47.3