linux-kernel - [PATCH v2] Cred: Remove unused set_security_override_from

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Message-ID: <c1b06d12-eebe-4b6f-bb47-c17bb0a05cd8@schaufler-ca.com>
Date: Tue, 23 Dec 2025 15:13:25 -0800
From: Casey Schaufler <casey@...aufler-ca.com>
To: Paul Moore <paul@...l-moore.com>, David Howells <dhowells@...hat.com>,
 Linux kernel mailing list <linux-kernel@...r.kernel.org>,
 Serge Hallyn <serge@...lyn.com>
Cc: max.kellermann@...os.com, LSM List
 <linux-security-module@...r.kernel.org>,
 Casey Schaufler <casey@...aufler-ca.com>
Subject: [PATCH v2] Cred: Remove unused set_security_override_from_ctx()

The function set_security_override_from_ctx() has no in-tree callers
since 6.14. Remove it.

Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>
---
 include/linux/cred.h |  1 -
 kernel/cred.c        | 23 -----------------------
 2 files changed, 24 deletions(-)

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 343a140a6ba2..ed1609d78cd7 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -164,7 +164,6 @@ static inline const struct cred *kernel_cred(void)
 	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 *);
 extern int cred_fscmp(const struct cred *, const struct cred *);
 extern void __init cred_init(void);
diff --git a/kernel/cred.c b/kernel/cred.c
index a6f686b30da1..12a7b1ce5131 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -620,29 +620,6 @@ int set_security_override(struct cred *new, u32 secid)
 }
 EXPORT_SYMBOL(set_security_override);
 
-/**
- * set_security_override_from_ctx - Set the security ID in a set of credentials
- * @new: The credentials to alter
- * @secctx: The LSM security context to generate the security ID from.
- *
- * Set the LSM security ID in a set of credentials so that the subjective
- * security is overridden when an alternative set of credentials is used.  The
- * security ID is specified in string form as a security context to be
- * interpreted by the LSM.
- */
-int set_security_override_from_ctx(struct cred *new, const char *secctx)
-{
-	u32 secid;
-	int ret;
-
-	ret = security_secctx_to_secid(secctx, strlen(secctx), &secid);
-	if (ret < 0)
-		return ret;
-
-	return set_security_override(new, secid);
-}
-EXPORT_SYMBOL(set_security_override_from_ctx);
-
 /**
  * set_create_files_as - Set the LSM file create context in a set of credentials
  * @new: The credentials to alter