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cred: add kernel_cred() helper

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

Link: https://patch.msgid.link/20251103-work-creds-init_cred-v1-2-cb3ec8711a6a@kernel.org
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-11-03 00:12:41 +01:00
parent 4e97bae1b4
commit 4c7ceeb62d
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 7 additions and 0 deletions
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7
include/linux/cred.h
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@ -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 *);