lsm/stable-7.0 PR 20260203

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Merge tag 'lsm-pr-20260203' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm

Pull lsm updates from Paul Moore:

 - Unify the security_inode_listsecurity() calls in NFSv4

   While looking at security_inode_listsecurity() with an eye towards
   improving the interface, we realized that the NFSv4 code was making
   multiple calls to the LSM hook that could be consolidated into one.

 - Mark the LSM static branch keys as static - this helps resolve some
   sparse warnings

 - Add __rust_helper annotations to the LSM and cred wrapper functions

 - Remove the unsused set_security_override_from_ctx() function

 - Minor fixes to some of the LSM kdoc comment blocks

* tag 'lsm-pr-20260203' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
  lsm: make keys for static branch static
  cred: remove unused set_security_override_from_ctx()
  rust: security: add __rust_helper to helpers
  rust: cred: add __rust_helper to helpers
  nfs: unify security_inode_listsecurity() calls
  lsm: fix kernel-doc struct member names

fs/nfs/nfs4proc.c

@@ -8172,33 +8172,12 @@ static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
 	return -EOPNOTSUPP;
 }
 
-static ssize_t
-nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
-{
-	int len = 0;
-
-	if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
-		len = security_inode_listsecurity(inode, list, list_len);
-		if (len >= 0 && list_len && len > list_len)
-			return -ERANGE;
-	}
-	return len;
-}
-
 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
 	.prefix = XATTR_SECURITY_PREFIX,
 	.get	= nfs4_xattr_get_nfs4_label,
 	.set	= nfs4_xattr_set_nfs4_label,
 };
 
-#else
-
-static ssize_t
-nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
-{
-	return 0;
-}
-
 #endif
 
 #ifdef CONFIG_NFS_V4_2
@@ -10995,7 +10974,7 @@ const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
 
 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
 {
-	ssize_t error, error2, error3, error4 = 0;
+	ssize_t error, error2, error3;
 	size_t left = size;
 
 	error = generic_listxattr(dentry, list, left);
@@ -11006,10 +10985,9 @@ static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
 		left -= error;
 	}
 
-	error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left);
+	error2 = security_inode_listsecurity(d_inode(dentry), list, left);
 	if (error2 < 0)
 		return error2;
-
 	if (list) {
 		list += error2;
 		left -= error2;
@@ -11018,18 +10996,8 @@ static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
 	error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left);
 	if (error3 < 0)
 		return error3;
-	if (list) {
-		list += error3;
-		left -= error3;
-	}
 
-	if (!nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
-		error4 = security_inode_listsecurity(d_inode(dentry), list, left);
-		if (error4 < 0)
-			return error4;
-	}
-
-	error += error2 + error3 + error4;
+	error += error2 + error3;
 	if (size && error > size)
 		return -ERANGE;
 	return error;

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);

include/linux/lsm_hooks.h

@@ -73,7 +73,7 @@ struct lsm_static_calls_table {
 
 /**
  * struct lsm_id - Identify a Linux Security Module.
- * @lsm: name of the LSM, must be approved by the LSM maintainers
+ * @name: name of the LSM, must be approved by the LSM maintainers
  * @id: LSM ID number from uapi/linux/lsm.h
  *
  * Contains the information that identifies the LSM.
@@ -164,7 +164,7 @@ enum lsm_order {
  * @initcall_core: LSM callback for core_initcall() setup, optional
  * @initcall_subsys: LSM callback for subsys_initcall() setup, optional
  * @initcall_fs: LSM callback for fs_initcall setup, optional
- * @nitcall_device: LSM callback for device_initcall() setup, optional
+ * @initcall_device: LSM callback for device_initcall() setup, optional
  * @initcall_late: LSM callback for late_initcall() setup, optional
  */
 struct lsm_info {

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

rust/helpers/cred.c

@@ -2,12 +2,12 @@
 
 #include <linux/cred.h>
 
-const struct cred *rust_helper_get_cred(const struct cred *cred)
+__rust_helper const struct cred *rust_helper_get_cred(const struct cred *cred)
 {
 	return get_cred(cred);
 }
 
-void rust_helper_put_cred(const struct cred *cred)
+__rust_helper void rust_helper_put_cred(const struct cred *cred)
 {
 	put_cred(cred);
 }

rust/helpers/security.c

@@ -3,41 +3,45 @@
 #include <linux/security.h>
 
 #ifndef CONFIG_SECURITY
-void rust_helper_security_cred_getsecid(const struct cred *c, u32 *secid)
+__rust_helper void rust_helper_security_cred_getsecid(const struct cred *c,
+						      u32 *secid)
 {
 	security_cred_getsecid(c, secid);
 }
 
-int rust_helper_security_secid_to_secctx(u32 secid, struct lsm_context *cp)
+__rust_helper int rust_helper_security_secid_to_secctx(u32 secid,
+						       struct lsm_context *cp)
 {
 	return security_secid_to_secctx(secid, cp);
 }
 
-void rust_helper_security_release_secctx(struct lsm_context *cp)
+__rust_helper void rust_helper_security_release_secctx(struct lsm_context *cp)
 {
 	security_release_secctx(cp);
 }
 
-int rust_helper_security_binder_set_context_mgr(const struct cred *mgr)
+__rust_helper int
+rust_helper_security_binder_set_context_mgr(const struct cred *mgr)
 {
 	return security_binder_set_context_mgr(mgr);
 }
 
-int rust_helper_security_binder_transaction(const struct cred *from,
-					    const struct cred *to)
+__rust_helper int
+rust_helper_security_binder_transaction(const struct cred *from,
+					const struct cred *to)
 {
 	return security_binder_transaction(from, to);
 }
 
-int rust_helper_security_binder_transfer_binder(const struct cred *from,
-						const struct cred *to)
+__rust_helper int
+rust_helper_security_binder_transfer_binder(const struct cred *from,
+					    const struct cred *to)
 {
 	return security_binder_transfer_binder(from, to);
 }
 
-int rust_helper_security_binder_transfer_file(const struct cred *from,
-					      const struct cred *to,
-					      const struct file *file)
+__rust_helper int rust_helper_security_binder_transfer_file(
+	const struct cred *from, const struct cred *to, const struct file *file)
 {
 	return security_binder_transfer_file(from, to, file);
 }

security/security.c

@@ -115,7 +115,7 @@ do {						\
 #define DEFINE_LSM_STATIC_CALL(NUM, NAME, RET, ...)			\
 	DEFINE_STATIC_CALL_NULL(LSM_STATIC_CALL(NAME, NUM),		\
 				*((RET(*)(__VA_ARGS__))NULL));		\
-	DEFINE_STATIC_KEY_FALSE(SECURITY_HOOK_ACTIVE_KEY(NAME, NUM));
+	static DEFINE_STATIC_KEY_FALSE(SECURITY_HOOK_ACTIVE_KEY(NAME, NUM));
 
 #define LSM_HOOK(RET, DEFAULT, NAME, ...)				\
 	LSM_DEFINE_UNROLL(DEFINE_LSM_STATIC_CALL, NAME, RET, __VA_ARGS__)