From 6be8750b4cba8c37170f46b29841d112f1be749b Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 1 Dec 2018 22:42:44 -0500
Subject: LSM: lift parsing LSM options into the caller of ->sb_kern_mount()

This paves the way for retaining the LSM options from a common filesystem
mount context during a mount parameter parsing phase to be instituted prior
to actual mount/reconfiguration actions.

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 security/security.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'security/security.c')

diff --git a/security/security.c b/security/security.c
index 04d173eb93f6..b5fc8e1e849c 100644
--- a/security/security.c
+++ b/security/security.c
@@ -395,9 +395,10 @@ int security_sb_remount(struct super_block *sb, void *data)
 	return call_int_hook(sb_remount, 0, sb, data);
 }
 
-int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
+int security_sb_kern_mount(struct super_block *sb, int flags,
+			   struct security_mnt_opts *opts)
 {
-	return call_int_hook(sb_kern_mount, 0, sb, flags, data);
+	return call_int_hook(sb_kern_mount, 0, sb, flags, opts);
 }
 
 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
-- 
cgit v1.2.3-59-g8ed1b


From c039bc3c2498724946304a8f964244a9b6af1043 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 1 Dec 2018 23:06:57 -0500
Subject: LSM: lift extracting and parsing LSM options into the caller of
 ->sb_remount()

This paves the way for retaining the LSM options from a common filesystem
mount context during a mount parameter parsing phase to be instituted prior
to actual mount/reconfiguration actions.

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/namespace.c            | 19 ++++++++++++++++++-
 include/linux/lsm_hooks.h |  3 ++-
 include/linux/security.h  |  5 +++--
 security/security.c       |  5 +++--
 security/selinux/hooks.c  | 47 ++++++++++++-----------------------------------
 5 files changed, 38 insertions(+), 41 deletions(-)

(limited to 'security/security.c')

diff --git a/fs/namespace.c b/fs/namespace.c
index 08cffdad6665..341793fbd390 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2299,6 +2299,7 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 	int err;
 	struct super_block *sb = path->mnt->mnt_sb;
 	struct mount *mnt = real_mount(path->mnt);
+	struct security_mnt_opts opts;
 
 	if (!check_mnt(mnt))
 		return -EINVAL;
@@ -2309,7 +2310,23 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 	if (!can_change_locked_flags(mnt, mnt_flags))
 		return -EPERM;
 
-	err = security_sb_remount(sb, data);
+	security_init_mnt_opts(&opts);
+	if (data && !(sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)) {
+		char *secdata = alloc_secdata();
+		if (!secdata)
+			return -ENOMEM;
+		err = security_sb_copy_data(data, secdata);
+		if (err) {
+			free_secdata(secdata);
+			return err;
+		}
+		err = security_sb_parse_opts_str(secdata, &opts);
+		free_secdata(secdata);
+		if (err)
+			return err;
+	}
+	err = security_sb_remount(sb, &opts);
+	security_free_mnt_opts(&opts);
 	if (err)
 		return err;
 
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index c7f67341fd1d..e1a12a1e2b32 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1462,7 +1462,8 @@ union security_list_options {
 	int (*sb_alloc_security)(struct super_block *sb);
 	void (*sb_free_security)(struct super_block *sb);
 	int (*sb_copy_data)(char *orig, char *copy);
-	int (*sb_remount)(struct super_block *sb, void *data);
+	int (*sb_remount)(struct super_block *sb,
+			  struct security_mnt_opts *opts);
 	int (*sb_kern_mount)(struct super_block *sb, int flags,
 			     struct security_mnt_opts *opts);
 	int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
diff --git a/include/linux/security.h b/include/linux/security.h
index f2f88e41f35f..4fc6d98bc7a6 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -249,7 +249,7 @@ void security_bprm_committed_creds(struct linux_binprm *bprm);
 int security_sb_alloc(struct super_block *sb);
 void security_sb_free(struct super_block *sb);
 int security_sb_copy_data(char *orig, char *copy);
-int security_sb_remount(struct super_block *sb, void *data);
+int security_sb_remount(struct super_block *sb, struct security_mnt_opts *opts);
 int security_sb_kern_mount(struct super_block *sb, int flags,
 			   struct security_mnt_opts *opts);
 int security_sb_show_options(struct seq_file *m, struct super_block *sb);
@@ -561,7 +561,8 @@ static inline int security_sb_copy_data(char *orig, char *copy)
 	return 0;
 }
 
-static inline int security_sb_remount(struct super_block *sb, void *data)
+static inline int security_sb_remount(struct super_block *sb,
+				      struct security_mnt_opts *opts)
 {
 	return 0;
 }
diff --git a/security/security.c b/security/security.c
index b5fc8e1e849c..3f50beb30fb1 100644
--- a/security/security.c
+++ b/security/security.c
@@ -390,9 +390,10 @@ int security_sb_copy_data(char *orig, char *copy)
 }
 EXPORT_SYMBOL(security_sb_copy_data);
 
-int security_sb_remount(struct super_block *sb, void *data)
+int security_sb_remount(struct super_block *sb,
+			struct security_mnt_opts *opts)
 {
-	return call_int_hook(sb_remount, 0, sb, data);
+	return call_int_hook(sb_remount, 0, sb, opts);
 }
 
 int security_sb_kern_mount(struct super_block *sb, int flags,
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ba229d4a64d3..ba3e2917bd24 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2812,39 +2812,22 @@ out:
 	return rc;
 }
 
-static int selinux_sb_remount(struct super_block *sb, void *data)
+static int selinux_sb_remount(struct super_block *sb,
+			      struct security_mnt_opts *opts)
 {
-	int rc, i, *flags;
-	struct security_mnt_opts opts;
-	char *secdata, **mount_options;
+	int i, *flags;
+	char **mount_options;
 	struct superblock_security_struct *sbsec = sb->s_security;
 
 	if (!(sbsec->flags & SE_SBINITIALIZED))
 		return 0;
 
-	if (!data)
-		return 0;
-
-	if (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)
-		return 0;
-
-	security_init_mnt_opts(&opts);
-	secdata = alloc_secdata();
-	if (!secdata)
-		return -ENOMEM;
-	rc = selinux_sb_copy_data(data, secdata);
-	if (rc)
-		goto out_free_secdata;
-
-	rc = selinux_parse_opts_str(secdata, &opts);
-	if (rc)
-		goto out_free_secdata;
+	mount_options = opts->mnt_opts;
+	flags = opts->mnt_opts_flags;
 
-	mount_options = opts.mnt_opts;
-	flags = opts.mnt_opts_flags;
-
-	for (i = 0; i < opts.num_mnt_opts; i++) {
+	for (i = 0; i < opts->num_mnt_opts; i++) {
 		u32 sid;
+		int rc;
 
 		if (flags[i] == SBLABEL_MNT)
 			continue;
@@ -2855,9 +2838,8 @@ static int selinux_sb_remount(struct super_block *sb, void *data)
 			pr_warn("SELinux: security_context_str_to_sid"
 			       "(%s) failed for (dev %s, type %s) errno=%d\n",
 			       mount_options[i], sb->s_id, sb->s_type->name, rc);
-			goto out_free_opts;
+			return rc;
 		}
-		rc = -EINVAL;
 		switch (flags[i]) {
 		case FSCONTEXT_MNT:
 			if (bad_option(sbsec, FSCONTEXT_MNT, sbsec->sid, sid))
@@ -2880,21 +2862,16 @@ static int selinux_sb_remount(struct super_block *sb, void *data)
 				goto out_bad_option;
 			break;
 		default:
-			goto out_free_opts;
+			return -EINVAL;
 		}
 	}
+	return 0;
 
-	rc = 0;
-out_free_opts:
-	security_free_mnt_opts(&opts);
-out_free_secdata:
-	free_secdata(secdata);
-	return rc;
 out_bad_option:
 	pr_warn("SELinux: unable to change security options "
 	       "during remount (dev %s, type=%s)\n", sb->s_id,
 	       sb->s_type->name);
-	goto out_free_opts;
+	return -EINVAL;
 }
 
 static int selinux_sb_kern_mount(struct super_block *sb, int flags,
-- 
cgit v1.2.3-59-g8ed1b


From f5c0c26d9008b355babb6d16f3d7c4de3bada0e7 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 17 Nov 2018 12:09:18 -0500
Subject: new helper: security_sb_eat_lsm_opts()

combination of alloc_secdata(), security_sb_copy_data(),
security_sb_parse_opt_str() and free_secdata().

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/btrfs/super.c         | 15 +--------------
 fs/namespace.c           | 11 +----------
 fs/nfs/super.c           | 15 ++-------------
 fs/super.c               | 13 +------------
 include/linux/security.h | 28 +++-------------------------
 security/security.c      | 15 ++++++++++++---
 6 files changed, 20 insertions(+), 77 deletions(-)

(limited to 'security/security.c')

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index b362b45dd757..6fc8e963ad44 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1461,20 +1461,7 @@ out:
 static int parse_security_options(char *orig_opts,
 				  struct security_mnt_opts *sec_opts)
 {
-	char *secdata = NULL;
-	int ret = 0;
-
-	secdata = alloc_secdata();
-	if (!secdata)
-		return -ENOMEM;
-	ret = security_sb_copy_data(orig_opts, secdata);
-	if (ret) {
-		free_secdata(secdata);
-		return ret;
-	}
-	ret = security_sb_parse_opts_str(secdata, sec_opts);
-	free_secdata(secdata);
-	return ret;
+	return security_sb_eat_lsm_opts(orig_opts, sec_opts);
 }
 
 static int setup_security_options(struct btrfs_fs_info *fs_info,
diff --git a/fs/namespace.c b/fs/namespace.c
index 341793fbd390..39aca7b69c2e 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2312,16 +2312,7 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 
 	security_init_mnt_opts(&opts);
 	if (data && !(sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)) {
-		char *secdata = alloc_secdata();
-		if (!secdata)
-			return -ENOMEM;
-		err = security_sb_copy_data(data, secdata);
-		if (err) {
-			free_secdata(secdata);
-			return err;
-		}
-		err = security_sb_parse_opts_str(secdata, &opts);
-		free_secdata(secdata);
+		err = security_sb_eat_lsm_opts(data, &opts);
 		if (err)
 			return err;
 	}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ac4b2f005778..f9c8847171e8 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1206,7 +1206,7 @@ static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option,
 static int nfs_parse_mount_options(char *raw,
 				   struct nfs_parsed_mount_data *mnt)
 {
-	char *p, *string, *secdata;
+	char *p, *string;
 	int rc, sloppy = 0, invalid_option = 0;
 	unsigned short protofamily = AF_UNSPEC;
 	unsigned short mountfamily = AF_UNSPEC;
@@ -1217,20 +1217,10 @@ static int nfs_parse_mount_options(char *raw,
 	}
 	dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
 
-	secdata = alloc_secdata();
-	if (!secdata)
-		goto out_nomem;
-
-	rc = security_sb_copy_data(raw, secdata);
-	if (rc)
-		goto out_security_failure;
-
-	rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts);
+	rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts);
 	if (rc)
 		goto out_security_failure;
 
-	free_secdata(secdata);
-
 	while ((p = strsep(&raw, ",")) != NULL) {
 		substring_t args[MAX_OPT_ARGS];
 		unsigned long option;
@@ -1682,7 +1672,6 @@ out_nomem:
 	printk(KERN_INFO "NFS: not enough memory to parse option\n");
 	return 0;
 out_security_failure:
-	free_secdata(secdata);
 	printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
 	return 0;
 }
diff --git a/fs/super.c b/fs/super.c
index 8d9c9199832d..d571527cb8b8 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1252,18 +1252,7 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	security_init_mnt_opts(&opts);
 
 	if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
-		char *secdata = alloc_secdata();
-		if (!secdata)
-			return ERR_PTR(-ENOMEM);
-
-		error = security_sb_copy_data(data, secdata);
-		if (error) {
-			free_secdata(secdata);
-			return ERR_PTR(error);
-		}
-
-		error = security_sb_parse_opts_str(secdata, &opts);
-		free_secdata(secdata);
+		error = security_sb_eat_lsm_opts(data, &opts);
 		if (error)
 			return ERR_PTR(error);
 	}
diff --git a/include/linux/security.h b/include/linux/security.h
index 4fc6d98bc7a6..262e59838803 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -248,7 +248,7 @@ void security_bprm_committing_creds(struct linux_binprm *bprm);
 void security_bprm_committed_creds(struct linux_binprm *bprm);
 int security_sb_alloc(struct super_block *sb);
 void security_sb_free(struct super_block *sb);
-int security_sb_copy_data(char *orig, char *copy);
+int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts);
 int security_sb_remount(struct super_block *sb, struct security_mnt_opts *opts);
 int security_sb_kern_mount(struct super_block *sb, int flags,
 			   struct security_mnt_opts *opts);
@@ -556,7 +556,8 @@ static inline int security_sb_alloc(struct super_block *sb)
 static inline void security_sb_free(struct super_block *sb)
 { }
 
-static inline int security_sb_copy_data(char *orig, char *copy)
+static inline int security_sb_eat_lsm_opts(char *options,
+					   struct security_mnt_opts *opts)
 {
 	return 0;
 }
@@ -1823,28 +1824,5 @@ static inline void security_bpf_prog_free(struct bpf_prog_aux *aux)
 #endif /* CONFIG_SECURITY */
 #endif /* CONFIG_BPF_SYSCALL */
 
-#ifdef CONFIG_SECURITY
-
-static inline char *alloc_secdata(void)
-{
-	return (char *)get_zeroed_page(GFP_KERNEL);
-}
-
-static inline void free_secdata(void *secdata)
-{
-	free_page((unsigned long)secdata);
-}
-
-#else
-
-static inline char *alloc_secdata(void)
-{
-        return (char *)1;
-}
-
-static inline void free_secdata(void *secdata)
-{ }
-#endif /* CONFIG_SECURITY */
-
 #endif /* ! __LINUX_SECURITY_H */
 
diff --git a/security/security.c b/security/security.c
index 3f50beb30fb1..02c656dd5c0c 100644
--- a/security/security.c
+++ b/security/security.c
@@ -384,11 +384,20 @@ void security_sb_free(struct super_block *sb)
 	call_void_hook(sb_free_security, sb);
 }
 
-int security_sb_copy_data(char *orig, char *copy)
+int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
 {
-	return call_int_hook(sb_copy_data, 0, orig, copy);
+	char *s = (char *)get_zeroed_page(GFP_KERNEL);
+	int err;
+
+	if (!s)
+		return -ENOMEM;
+	err = call_int_hook(sb_copy_data, 0, options, s);
+	if (!err)
+		err = call_int_hook(sb_parse_opts_str, 0, s, opts);
+	free_page((unsigned long)s);
+	return err;
 }
-EXPORT_SYMBOL(security_sb_copy_data);
+EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 
 int security_sb_remount(struct super_block *sb,
 			struct security_mnt_opts *opts)
-- 
cgit v1.2.3-59-g8ed1b


From a10d7c22b34bcf744679019269bfb33ebf0b75ee Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 5 Dec 2018 11:58:35 -0500
Subject: LSM: split ->sb_set_mnt_opts() out of ->sb_kern_mount()

... leaving the "is it kernel-internal" logics in the caller.

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/super.c                 |  8 +++++++-
 include/linux/lsm_hooks.h  |  3 +--
 include/linux/security.h   |  6 ++----
 security/security.c        |  5 ++---
 security/selinux/hooks.c   | 10 +---------
 security/smack/smack_lsm.c | 15 ---------------
 6 files changed, 13 insertions(+), 34 deletions(-)

(limited to 'security/security.c')

diff --git a/fs/super.c b/fs/super.c
index d571527cb8b8..1f75fe312597 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1275,10 +1275,16 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	smp_wmb();
 	sb->s_flags |= SB_BORN;
 
-	error = security_sb_kern_mount(sb, flags, &opts);
+	error = security_sb_set_mnt_opts(sb, &opts, 0, NULL);
 	if (error)
 		goto out_sb;
 
+	if (!(flags & MS_KERNMOUNT)) {
+		error = security_sb_kern_mount(sb);
+		if (error)
+			goto out_sb;
+	}
+
 	/*
 	 * filesystems should never set s_maxbytes larger than MAX_LFS_FILESIZE
 	 * but s_maxbytes was an unsigned long long for many releases. Throw
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index e1a12a1e2b32..f432123af0e3 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1464,8 +1464,7 @@ union security_list_options {
 	int (*sb_copy_data)(char *orig, char *copy);
 	int (*sb_remount)(struct super_block *sb,
 			  struct security_mnt_opts *opts);
-	int (*sb_kern_mount)(struct super_block *sb, int flags,
-			     struct security_mnt_opts *opts);
+	int (*sb_kern_mount)(struct super_block *sb);
 	int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
 	int (*sb_statfs)(struct dentry *dentry);
 	int (*sb_mount)(const char *dev_name, const struct path *path,
diff --git a/include/linux/security.h b/include/linux/security.h
index 262e59838803..d00093363570 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -250,8 +250,7 @@ int security_sb_alloc(struct super_block *sb);
 void security_sb_free(struct super_block *sb);
 int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts);
 int security_sb_remount(struct super_block *sb, struct security_mnt_opts *opts);
-int security_sb_kern_mount(struct super_block *sb, int flags,
-			   struct security_mnt_opts *opts);
+int security_sb_kern_mount(struct super_block *sb);
 int security_sb_show_options(struct seq_file *m, struct super_block *sb);
 int security_sb_statfs(struct dentry *dentry);
 int security_sb_mount(const char *dev_name, const struct path *path,
@@ -568,8 +567,7 @@ static inline int security_sb_remount(struct super_block *sb,
 	return 0;
 }
 
-static inline int security_sb_kern_mount(struct super_block *sb, int flags,
-					 struct security_mnt_opts *opts)
+static inline int security_sb_kern_mount(struct super_block *sb)
 {
 	return 0;
 }
diff --git a/security/security.c b/security/security.c
index 02c656dd5c0c..afb05646d41b 100644
--- a/security/security.c
+++ b/security/security.c
@@ -405,10 +405,9 @@ int security_sb_remount(struct super_block *sb,
 	return call_int_hook(sb_remount, 0, sb, opts);
 }
 
-int security_sb_kern_mount(struct super_block *sb, int flags,
-			   struct security_mnt_opts *opts)
+int security_sb_kern_mount(struct super_block *sb)
 {
-	return call_int_hook(sb_kern_mount, 0, sb, flags, opts);
+	return call_int_hook(sb_kern_mount, 0, sb);
 }
 
 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ba3e2917bd24..59b164d7134d 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2874,18 +2874,10 @@ out_bad_option:
 	return -EINVAL;
 }
 
-static int selinux_sb_kern_mount(struct super_block *sb, int flags,
-				 struct security_mnt_opts *opts)
+static int selinux_sb_kern_mount(struct super_block *sb)
 {
 	const struct cred *cred = current_cred();
 	struct common_audit_data ad;
-	int rc = selinux_set_mnt_opts(sb, opts, 0, NULL);
-	if (rc)
-		return rc;
-
-	/* Allow all mounts performed by the kernel */
-	if (flags & MS_KERNMOUNT)
-		return 0;
 
 	ad.type = LSM_AUDIT_DATA_DENTRY;
 	ad.u.dentry = sb->s_root;
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 1d465ae3d11c..50e6e88bfe70 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -851,20 +851,6 @@ static int smack_set_mnt_opts(struct super_block *sb,
 	return 0;
 }
 
-/**
- * smack_sb_kern_mount - Smack specific mount processing
- * @sb: the file system superblock
- * @flags: the mount flags
- * @data: the smack mount options
- *
- * Returns 0 on success, an error code on failure
- */
-static int smack_sb_kern_mount(struct super_block *sb, int flags,
-			       struct security_mnt_opts *opts)
-{
-	return smack_set_mnt_opts(sb, opts, 0, NULL);
-}
-
 /**
  * smack_sb_statfs - Smack check on statfs
  * @dentry: identifies the file system in question
@@ -4652,7 +4638,6 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(sb_alloc_security, smack_sb_alloc_security),
 	LSM_HOOK_INIT(sb_free_security, smack_sb_free_security),
 	LSM_HOOK_INIT(sb_copy_data, smack_sb_copy_data),
-	LSM_HOOK_INIT(sb_kern_mount, smack_sb_kern_mount),
 	LSM_HOOK_INIT(sb_statfs, smack_sb_statfs),
 	LSM_HOOK_INIT(sb_set_mnt_opts, smack_set_mnt_opts),
 	LSM_HOOK_INIT(sb_parse_opts_str, smack_parse_opts_str),
-- 
cgit v1.2.3-59-g8ed1b


From a65001e8a4d465693d0191297a6fd864c96b3147 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 10 Dec 2018 17:19:21 -0500
Subject: btrfs: sanitize security_mnt_opts use

1) keeping a copy in btrfs_fs_info is completely pointless - we never
use it for anything.  Getting rid of that allows for simpler calling
conventions for setup_security_options() (caller is responsible for
freeing mnt_opts in all cases).

2) on remount we want to use ->sb_remount(), not ->sb_set_mnt_opts(),
same as we would if not for FS_BINARY_MOUNTDATA.  Behaviours *are*
close (in fact, selinux sb_set_mnt_opts() ought to punt to
sb_remount() in "already initialized" case), but let's handle
that uniformly.  And the only reason why the original btrfs changes
didn't go for security_sb_remount() in btrfs_remount() case is that
it hadn't been exported.  Let's export it for a while - it'll be
going away soon anyway.

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/btrfs/ctree.h    |  4 ----
 fs/btrfs/super.c    | 63 ++++++++---------------------------------------------
 security/security.c |  1 +
 3 files changed, 10 insertions(+), 58 deletions(-)

(limited to 'security/security.c')

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 80953528572d..f7ec833e6c7a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1100,9 +1100,6 @@ struct btrfs_fs_info {
 	struct mutex unused_bg_unpin_mutex;
 	struct mutex delete_unused_bgs_mutex;
 
-	/* For btrfs to record security options */
-	struct security_mnt_opts security_opts;
-
 	/*
 	 * Chunks that can't be freed yet (under a trim/discard operation)
 	 * and will be latter freed. Protected by fs_info->chunk_mutex.
@@ -2959,7 +2956,6 @@ static inline void free_fs_info(struct btrfs_fs_info *fs_info)
 	kfree(fs_info->free_space_root);
 	kfree(fs_info->super_copy);
 	kfree(fs_info->super_for_commit);
-	security_free_mnt_opts(&fs_info->security_opts);
 	kvfree(fs_info);
 }
 
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6fc8e963ad44..3b04e7735b5f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1458,43 +1458,6 @@ out:
 	return root;
 }
 
-static int parse_security_options(char *orig_opts,
-				  struct security_mnt_opts *sec_opts)
-{
-	return security_sb_eat_lsm_opts(orig_opts, sec_opts);
-}
-
-static int setup_security_options(struct btrfs_fs_info *fs_info,
-				  struct super_block *sb,
-				  struct security_mnt_opts *sec_opts)
-{
-	int ret = 0;
-
-	/*
-	 * Call security_sb_set_mnt_opts() to check whether new sec_opts
-	 * is valid.
-	 */
-	ret = security_sb_set_mnt_opts(sb, sec_opts, 0, NULL);
-	if (ret)
-		return ret;
-
-#ifdef CONFIG_SECURITY
-	if (!fs_info->security_opts.num_mnt_opts) {
-		/* first time security setup, copy sec_opts to fs_info */
-		memcpy(&fs_info->security_opts, sec_opts, sizeof(*sec_opts));
-	} else {
-		/*
-		 * Since SELinux (the only one supporting security_mnt_opts)
-		 * does NOT support changing context during remount/mount of
-		 * the same sb, this must be the same or part of the same
-		 * security options, just free it.
-		 */
-		security_free_mnt_opts(sec_opts);
-	}
-#endif
-	return ret;
-}
-
 /*
  * Find a superblock for the given device / mount point.
  *
@@ -1518,7 +1481,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 
 	security_init_mnt_opts(&new_sec_opts);
 	if (data) {
-		error = parse_security_options(data, &new_sec_opts);
+		error = security_sb_eat_lsm_opts(data, &new_sec_opts);
 		if (error)
 			return ERR_PTR(error);
 	}
@@ -1537,7 +1500,6 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 
 	fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL);
 	fs_info->super_for_commit = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL);
-	security_init_mnt_opts(&fs_info->security_opts);
 	if (!fs_info->super_copy || !fs_info->super_for_commit) {
 		error = -ENOMEM;
 		goto error_fs_info;
@@ -1588,16 +1550,12 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 		btrfs_sb(s)->bdev_holder = fs_type;
 		error = btrfs_fill_super(s, fs_devices, data);
 	}
+	if (!error)
+		error = security_sb_set_mnt_opts(s, &new_sec_opts, 0, NULL);
+	security_free_mnt_opts(&new_sec_opts);
 	if (error) {
 		deactivate_locked_super(s);
-		goto error_sec_opts;
-	}
-
-	fs_info = btrfs_sb(s);
-	error = setup_security_options(fs_info, s, &new_sec_opts);
-	if (error) {
-		deactivate_locked_super(s);
-		goto error_sec_opts;
+		return ERR_PTR(error);
 	}
 
 	return dget(s->s_root);
@@ -1769,15 +1727,12 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
 		struct security_mnt_opts new_sec_opts;
 
 		security_init_mnt_opts(&new_sec_opts);
-		ret = parse_security_options(data, &new_sec_opts);
+		ret = security_sb_eat_lsm_opts(data, &new_sec_opts);
+		if (!ret)
+			ret = security_sb_remount(sb, &new_sec_opts);
+		security_free_mnt_opts(&new_sec_opts);
 		if (ret)
 			goto restore;
-		ret = setup_security_options(fs_info, sb,
-					     &new_sec_opts);
-		if (ret) {
-			security_free_mnt_opts(&new_sec_opts);
-			goto restore;
-		}
 	}
 
 	ret = btrfs_parse_options(fs_info, data, *flags);
diff --git a/security/security.c b/security/security.c
index afb05646d41b..3d8b72904e00 100644
--- a/security/security.c
+++ b/security/security.c
@@ -404,6 +404,7 @@ int security_sb_remount(struct super_block *sb,
 {
 	return call_int_hook(sb_remount, 0, sb, opts);
 }
+EXPORT_SYMBOL(security_sb_remount);
 
 int security_sb_kern_mount(struct super_block *sb)
 {
-- 
cgit v1.2.3-59-g8ed1b


From 5b4002391153acebce2557af318bbdc17e235134 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 12 Dec 2018 20:13:29 -0500
Subject: LSM: turn sb_eat_lsm_opts() into a method

Kill ->sb_copy_data() - it's used only in combination with immediately
following ->sb_parse_opts_str().  Turn that combination into a new
method.

This is just a mechanical move - cleanups will be the next step.

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 include/linux/lsm_hooks.h  |  4 ++--
 security/security.c        | 11 +----------
 security/selinux/hooks.c   | 16 +++++++++++++++-
 security/smack/smack_lsm.c | 16 +++++++++++++++-
 4 files changed, 33 insertions(+), 14 deletions(-)

(limited to 'security/security.c')

diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index f432123af0e3..c418909c178c 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1461,7 +1461,7 @@ union security_list_options {
 
 	int (*sb_alloc_security)(struct super_block *sb);
 	void (*sb_free_security)(struct super_block *sb);
-	int (*sb_copy_data)(char *orig, char *copy);
+	int (*sb_eat_lsm_opts)(char *orig, struct security_mnt_opts *opts);
 	int (*sb_remount)(struct super_block *sb,
 			  struct security_mnt_opts *opts);
 	int (*sb_kern_mount)(struct super_block *sb);
@@ -1801,7 +1801,7 @@ struct security_hook_heads {
 	struct hlist_head bprm_committed_creds;
 	struct hlist_head sb_alloc_security;
 	struct hlist_head sb_free_security;
-	struct hlist_head sb_copy_data;
+	struct hlist_head sb_eat_lsm_opts;
 	struct hlist_head sb_remount;
 	struct hlist_head sb_kern_mount;
 	struct hlist_head sb_show_options;
diff --git a/security/security.c b/security/security.c
index 3d8b72904e00..feb18c925349 100644
--- a/security/security.c
+++ b/security/security.c
@@ -386,16 +386,7 @@ void security_sb_free(struct super_block *sb)
 
 int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
 {
-	char *s = (char *)get_zeroed_page(GFP_KERNEL);
-	int err;
-
-	if (!s)
-		return -ENOMEM;
-	err = call_int_hook(sb_copy_data, 0, options, s);
-	if (!err)
-		err = call_int_hook(sb_parse_opts_str, 0, s, opts);
-	free_page((unsigned long)s);
-	return err;
+	return call_int_hook(sb_eat_lsm_opts, 0, options, opts);
 }
 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 630fe8883957..ce0511f024e0 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2810,6 +2810,20 @@ out:
 	return rc;
 }
 
+static int selinux_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
+{
+	char *s = (char *)get_zeroed_page(GFP_KERNEL);
+	int err;
+
+	if (!s)
+		return -ENOMEM;
+	err = selinux_sb_copy_data(options, s);
+	if (!err)
+		err = selinux_parse_opts_str(s, opts);
+	free_page((unsigned long)s);
+	return err;
+}
+
 static int selinux_sb_remount(struct super_block *sb,
 			      struct security_mnt_opts *opts)
 {
@@ -6863,7 +6877,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
 
 	LSM_HOOK_INIT(sb_alloc_security, selinux_sb_alloc_security),
 	LSM_HOOK_INIT(sb_free_security, selinux_sb_free_security),
-	LSM_HOOK_INIT(sb_copy_data, selinux_sb_copy_data),
+	LSM_HOOK_INIT(sb_eat_lsm_opts, selinux_sb_eat_lsm_opts),
 	LSM_HOOK_INIT(sb_remount, selinux_sb_remount),
 	LSM_HOOK_INIT(sb_kern_mount, selinux_sb_kern_mount),
 	LSM_HOOK_INIT(sb_show_options, selinux_sb_show_options),
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 50e6e88bfe70..835cca277c2a 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -739,6 +739,20 @@ out_err:
 	return rc;
 }
 
+static int smack_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
+{
+	char *s = (char *)get_zeroed_page(GFP_KERNEL);
+	int err;
+
+	if (!s)
+		return -ENOMEM;
+	err = smack_sb_copy_data(options, s);
+	if (!err)
+		err = smack_parse_opts_str(s, opts);
+	free_page((unsigned long)s);
+	return err;
+}
+
 /**
  * smack_set_mnt_opts - set Smack specific mount options
  * @sb: the file system superblock
@@ -4637,7 +4651,7 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
 
 	LSM_HOOK_INIT(sb_alloc_security, smack_sb_alloc_security),
 	LSM_HOOK_INIT(sb_free_security, smack_sb_free_security),
-	LSM_HOOK_INIT(sb_copy_data, smack_sb_copy_data),
+	LSM_HOOK_INIT(sb_eat_lsm_opts, smack_sb_eat_lsm_opts),
 	LSM_HOOK_INIT(sb_statfs, smack_sb_statfs),
 	LSM_HOOK_INIT(sb_set_mnt_opts, smack_set_mnt_opts),
 	LSM_HOOK_INIT(sb_parse_opts_str, smack_parse_opts_str),
-- 
cgit v1.2.3-59-g8ed1b


From 204cc0ccf1d49c6292aeef4c8edd1b3d10ff933c Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 13 Dec 2018 13:41:47 -0500
Subject: LSM: hide struct security_mnt_opts from any generic code

Keep void * instead, allocate on demand (in parse_str_opts, at the
moment).  Eventually both selinux and smack will be better off
with private structures with several strings in those, rather than
this "counter and two pointers to dynamically allocated arrays"
ugliness.  This commit allows to do that at leisure, without
disrupting anything outside of given module.

Changes:
	* instead of struct security_mnt_opt use an opaque pointer
initialized to NULL.
	* security_sb_eat_lsm_opts(), security_sb_parse_opts_str() and
security_free_mnt_opts() take it as var argument (i.e. as void **);
call sites are unchanged.
	* security_sb_set_mnt_opts() and security_sb_remount() take
it by value (i.e. as void *).
	* new method: ->sb_free_mnt_opts().  Takes void *, does
whatever freeing that needs to be done.
	* ->sb_set_mnt_opts() and ->sb_remount() might get NULL as
mnt_opts argument, meaning "empty".

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/btrfs/super.c           | 10 ++++-----
 fs/namespace.c             |  9 ++++----
 fs/nfs/internal.h          |  2 +-
 fs/nfs/super.c             |  6 +++---
 fs/super.c                 | 12 +++++------
 include/linux/lsm_hooks.h  | 11 +++++-----
 include/linux/security.h   | 43 +++++++++-----------------------------
 security/security.c        | 27 ++++++++++++++++--------
 security/selinux/hooks.c   | 52 +++++++++++++++++++++++++++++++++-------------
 security/smack/smack_lsm.c | 38 ++++++++++++++++++++++++++-------
 10 files changed, 118 insertions(+), 92 deletions(-)

(limited to 'security/security.c')

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 3b04e7735b5f..e90c4616ed6a 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1472,14 +1472,13 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 	struct btrfs_device *device = NULL;
 	struct btrfs_fs_devices *fs_devices = NULL;
 	struct btrfs_fs_info *fs_info = NULL;
-	struct security_mnt_opts new_sec_opts;
+	void *new_sec_opts = NULL;
 	fmode_t mode = FMODE_READ;
 	int error = 0;
 
 	if (!(flags & SB_RDONLY))
 		mode |= FMODE_WRITE;
 
-	security_init_mnt_opts(&new_sec_opts);
 	if (data) {
 		error = security_sb_eat_lsm_opts(data, &new_sec_opts);
 		if (error)
@@ -1551,7 +1550,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 		error = btrfs_fill_super(s, fs_devices, data);
 	}
 	if (!error)
-		error = security_sb_set_mnt_opts(s, &new_sec_opts, 0, NULL);
+		error = security_sb_set_mnt_opts(s, new_sec_opts, 0, NULL);
 	security_free_mnt_opts(&new_sec_opts);
 	if (error) {
 		deactivate_locked_super(s);
@@ -1724,12 +1723,11 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
 	btrfs_remount_prepare(fs_info);
 
 	if (data) {
-		struct security_mnt_opts new_sec_opts;
+		void *new_sec_opts = NULL;
 
-		security_init_mnt_opts(&new_sec_opts);
 		ret = security_sb_eat_lsm_opts(data, &new_sec_opts);
 		if (!ret)
-			ret = security_sb_remount(sb, &new_sec_opts);
+			ret = security_sb_remount(sb, new_sec_opts);
 		security_free_mnt_opts(&new_sec_opts);
 		if (ret)
 			goto restore;
diff --git a/fs/namespace.c b/fs/namespace.c
index 39aca7b69c2e..badfd287358c 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2299,7 +2299,7 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 	int err;
 	struct super_block *sb = path->mnt->mnt_sb;
 	struct mount *mnt = real_mount(path->mnt);
-	struct security_mnt_opts opts;
+	void *sec_opts = NULL;
 
 	if (!check_mnt(mnt))
 		return -EINVAL;
@@ -2310,14 +2310,13 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 	if (!can_change_locked_flags(mnt, mnt_flags))
 		return -EPERM;
 
-	security_init_mnt_opts(&opts);
 	if (data && !(sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)) {
-		err = security_sb_eat_lsm_opts(data, &opts);
+		err = security_sb_eat_lsm_opts(data, &sec_opts);
 		if (err)
 			return err;
 	}
-	err = security_sb_remount(sb, &opts);
-	security_free_mnt_opts(&opts);
+	err = security_sb_remount(sb, sec_opts);
+	security_free_mnt_opts(&sec_opts);
 	if (err)
 		return err;
 
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 8357ff69962f..97e1dcefe561 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -123,7 +123,7 @@ struct nfs_parsed_mount_data {
 		unsigned short		protocol;
 	} nfs_server;
 
-	struct security_mnt_opts lsm_opts;
+	void			*lsm_opts;
 	struct net		*net;
 };
 
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 300bdd1d4a09..1943de8f9d29 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -929,7 +929,7 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
 		data->minorversion	= 0;
 		data->need_mount	= true;
 		data->net		= current->nsproxy->net_ns;
-		security_init_mnt_opts(&data->lsm_opts);
+		data->lsm_opts		= NULL;
 	}
 	return data;
 }
@@ -2294,7 +2294,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
 	/* compare new mount options with old ones */
 	error = nfs_compare_remount_data(nfss, data);
 	if (!error)
-		error = security_sb_remount(sb, &data->lsm_opts);
+		error = security_sb_remount(sb, data->lsm_opts);
 out:
 	nfs_free_parsed_mount_data(data);
 	return error;
@@ -2534,7 +2534,7 @@ int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot,
 	if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL)
 		kflags |= SECURITY_LSM_NATIVE_LABELS;
 
-	error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts,
+	error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts,
 						kflags, &kflags_out);
 	if (error)
 		goto err;
diff --git a/fs/super.c b/fs/super.c
index 1f75fe312597..a5511c4ba69b 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1247,12 +1247,10 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	struct dentry *root;
 	struct super_block *sb;
 	int error = -ENOMEM;
-	struct security_mnt_opts opts;
-
-	security_init_mnt_opts(&opts);
+	void *sec_opts = NULL;
 
 	if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
-		error = security_sb_eat_lsm_opts(data, &opts);
+		error = security_sb_eat_lsm_opts(data, &sec_opts);
 		if (error)
 			return ERR_PTR(error);
 	}
@@ -1275,7 +1273,7 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	smp_wmb();
 	sb->s_flags |= SB_BORN;
 
-	error = security_sb_set_mnt_opts(sb, &opts, 0, NULL);
+	error = security_sb_set_mnt_opts(sb, sec_opts, 0, NULL);
 	if (error)
 		goto out_sb;
 
@@ -1295,13 +1293,13 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 		"negative value (%lld)\n", type->name, sb->s_maxbytes);
 
 	up_write(&sb->s_umount);
-	security_free_mnt_opts(&opts);
+	security_free_mnt_opts(&sec_opts);
 	return root;
 out_sb:
 	dput(root);
 	deactivate_locked_super(sb);
 out_free_secdata:
-	security_free_mnt_opts(&opts);
+	security_free_mnt_opts(&sec_opts);
 	return ERR_PTR(error);
 }
 
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index c418909c178c..a9c541f5732e 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1461,9 +1461,9 @@ union security_list_options {
 
 	int (*sb_alloc_security)(struct super_block *sb);
 	void (*sb_free_security)(struct super_block *sb);
-	int (*sb_eat_lsm_opts)(char *orig, struct security_mnt_opts *opts);
-	int (*sb_remount)(struct super_block *sb,
-			  struct security_mnt_opts *opts);
+	void (*sb_free_mnt_opts)(void *mnt_opts);
+	int (*sb_eat_lsm_opts)(char *orig, void **mnt_opts);
+	int (*sb_remount)(struct super_block *sb, void *mnt_opts);
 	int (*sb_kern_mount)(struct super_block *sb);
 	int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
 	int (*sb_statfs)(struct dentry *dentry);
@@ -1472,14 +1472,14 @@ union security_list_options {
 	int (*sb_umount)(struct vfsmount *mnt, int flags);
 	int (*sb_pivotroot)(const struct path *old_path, const struct path *new_path);
 	int (*sb_set_mnt_opts)(struct super_block *sb,
-				struct security_mnt_opts *opts,
+				void *mnt_opts,
 				unsigned long kern_flags,
 				unsigned long *set_kern_flags);
 	int (*sb_clone_mnt_opts)(const struct super_block *oldsb,
 					struct super_block *newsb,
 					unsigned long kern_flags,
 					unsigned long *set_kern_flags);
-	int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts);
+	int (*sb_parse_opts_str)(char *options, void **mnt_opts);
 	int (*dentry_init_security)(struct dentry *dentry, int mode,
 					const struct qstr *name, void **ctx,
 					u32 *ctxlen);
@@ -1801,6 +1801,7 @@ struct security_hook_heads {
 	struct hlist_head bprm_committed_creds;
 	struct hlist_head sb_alloc_security;
 	struct hlist_head sb_free_security;
+	struct hlist_head sb_free_mnt_opts;
 	struct hlist_head sb_eat_lsm_opts;
 	struct hlist_head sb_remount;
 	struct hlist_head sb_kern_mount;
diff --git a/include/linux/security.h b/include/linux/security.h
index d00093363570..4bca0be95b7a 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -192,26 +192,6 @@ int call_lsm_notifier(enum lsm_event event, void *data);
 int register_lsm_notifier(struct notifier_block *nb);
 int unregister_lsm_notifier(struct notifier_block *nb);
 
-static inline void security_init_mnt_opts(struct security_mnt_opts *opts)
-{
-	opts->mnt_opts = NULL;
-	opts->mnt_opts_flags = NULL;
-	opts->num_mnt_opts = 0;
-}
-
-static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
-{
-	int i;
-	if (opts->mnt_opts)
-		for (i = 0; i < opts->num_mnt_opts; i++)
-			kfree(opts->mnt_opts[i]);
-	kfree(opts->mnt_opts);
-	opts->mnt_opts = NULL;
-	kfree(opts->mnt_opts_flags);
-	opts->mnt_opts_flags = NULL;
-	opts->num_mnt_opts = 0;
-}
-
 /* prototypes */
 extern int security_init(void);
 
@@ -248,8 +228,9 @@ void security_bprm_committing_creds(struct linux_binprm *bprm);
 void security_bprm_committed_creds(struct linux_binprm *bprm);
 int security_sb_alloc(struct super_block *sb);
 void security_sb_free(struct super_block *sb);
-int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts);
-int security_sb_remount(struct super_block *sb, struct security_mnt_opts *opts);
+void security_free_mnt_opts(void **mnt_opts);
+int security_sb_eat_lsm_opts(char *options, void **mnt_opts);
+int security_sb_remount(struct super_block *sb, void *mnt_opts);
 int security_sb_kern_mount(struct super_block *sb);
 int security_sb_show_options(struct seq_file *m, struct super_block *sb);
 int security_sb_statfs(struct dentry *dentry);
@@ -258,14 +239,14 @@ int security_sb_mount(const char *dev_name, const struct path *path,
 int security_sb_umount(struct vfsmount *mnt, int flags);
 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path);
 int security_sb_set_mnt_opts(struct super_block *sb,
-				struct security_mnt_opts *opts,
+				void *mnt_opts,
 				unsigned long kern_flags,
 				unsigned long *set_kern_flags);
 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 				struct super_block *newsb,
 				unsigned long kern_flags,
 				unsigned long *set_kern_flags);
-int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts);
+int security_sb_parse_opts_str(char *options, void **mnt_opts);
 int security_dentry_init_security(struct dentry *dentry, int mode,
 					const struct qstr *name, void **ctx,
 					u32 *ctxlen);
@@ -421,11 +402,7 @@ static inline  int unregister_lsm_notifier(struct notifier_block *nb)
 	return 0;
 }
 
-static inline void security_init_mnt_opts(struct security_mnt_opts *opts)
-{
-}
-
-static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
+static inline void security_free_mnt_opts(void **mnt_opts)
 {
 }
 
@@ -556,13 +533,13 @@ static inline void security_sb_free(struct super_block *sb)
 { }
 
 static inline int security_sb_eat_lsm_opts(char *options,
-					   struct security_mnt_opts *opts)
+					   void **mnt_opts)
 {
 	return 0;
 }
 
 static inline int security_sb_remount(struct super_block *sb,
-				      struct security_mnt_opts *opts)
+				      void *mnt_opts)
 {
 	return 0;
 }
@@ -602,7 +579,7 @@ static inline int security_sb_pivotroot(const struct path *old_path,
 }
 
 static inline int security_sb_set_mnt_opts(struct super_block *sb,
-					   struct security_mnt_opts *opts,
+					   void *mnt_opts,
 					   unsigned long kern_flags,
 					   unsigned long *set_kern_flags)
 {
@@ -617,7 +594,7 @@ static inline int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 	return 0;
 }
 
-static inline int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
+static inline int security_sb_parse_opts_str(char *options, void **mnt_opts)
 {
 	return 0;
 }
diff --git a/security/security.c b/security/security.c
index feb18c925349..b7a5a0051807 100644
--- a/security/security.c
+++ b/security/security.c
@@ -384,16 +384,25 @@ void security_sb_free(struct super_block *sb)
 	call_void_hook(sb_free_security, sb);
 }
 
-int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
+void security_free_mnt_opts(void **mnt_opts)
 {
-	return call_int_hook(sb_eat_lsm_opts, 0, options, opts);
+	if (!*mnt_opts)
+		return;
+	call_void_hook(sb_free_mnt_opts, *mnt_opts);
+	*mnt_opts = NULL;
+}
+EXPORT_SYMBOL(security_free_mnt_opts);
+
+int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
+{
+	return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 }
 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 
 int security_sb_remount(struct super_block *sb,
-			struct security_mnt_opts *opts)
+			void *mnt_opts)
 {
-	return call_int_hook(sb_remount, 0, sb, opts);
+	return call_int_hook(sb_remount, 0, sb, mnt_opts);
 }
 EXPORT_SYMBOL(security_sb_remount);
 
@@ -429,13 +438,13 @@ int security_sb_pivotroot(const struct path *old_path, const struct path *new_pa
 }
 
 int security_sb_set_mnt_opts(struct super_block *sb,
-				struct security_mnt_opts *opts,
+				void *mnt_opts,
 				unsigned long kern_flags,
 				unsigned long *set_kern_flags)
 {
 	return call_int_hook(sb_set_mnt_opts,
-				opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
-				opts, kern_flags, set_kern_flags);
+				mnt_opts ? -EOPNOTSUPP : 0, sb,
+				mnt_opts, kern_flags, set_kern_flags);
 }
 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 
@@ -449,9 +458,9 @@ int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 }
 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 
-int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
+int security_sb_parse_opts_str(char *options, void **mnt_opts)
 {
-	return call_int_hook(sb_parse_opts_str, 0, options, opts);
+	return call_int_hook(sb_parse_opts_str, 0, options, mnt_opts);
 }
 EXPORT_SYMBOL(security_sb_parse_opts_str);
 
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 11cf2feb27b3..caf7ca7abfc1 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -433,6 +433,19 @@ static void superblock_free_security(struct super_block *sb)
 	kfree(sbsec);
 }
 
+static void selinux_free_mnt_opts(void *mnt_opts)
+{
+	struct security_mnt_opts *opts = mnt_opts;
+	int i;
+
+	if (opts->mnt_opts)
+		for (i = 0; i < opts->num_mnt_opts; i++)
+			kfree(opts->mnt_opts[i]);
+	kfree(opts->mnt_opts);
+	kfree(opts->mnt_opts_flags);
+	kfree(opts);
+}
+
 static inline int inode_doinit(struct inode *inode)
 {
 	return inode_doinit_with_dentry(inode, NULL);
@@ -616,7 +629,7 @@ static int bad_option(struct superblock_security_struct *sbsec, char flag,
  * labeling information.
  */
 static int selinux_set_mnt_opts(struct super_block *sb,
-				struct security_mnt_opts *opts,
+				void *mnt_opts,
 				unsigned long kern_flags,
 				unsigned long *set_kern_flags)
 {
@@ -628,9 +641,10 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 	struct inode_security_struct *root_isec;
 	u32 fscontext_sid = 0, context_sid = 0, rootcontext_sid = 0;
 	u32 defcontext_sid = 0;
-	char **mount_options = opts->mnt_opts;
-	int *flags = opts->mnt_opts_flags;
-	int num_opts = opts->num_mnt_opts;
+	struct security_mnt_opts *opts = mnt_opts;
+	char **mount_options = opts ? opts->mnt_opts : NULL;
+	int *flags = opts ? opts->mnt_opts_flags : NULL;
+	int num_opts = opts ? opts->num_mnt_opts : 0;
 
 	mutex_lock(&sbsec->lock);
 
@@ -982,12 +996,20 @@ out:
 }
 
 static int selinux_parse_opts_str(char *options,
-				  struct security_mnt_opts *opts)
+				  void **mnt_opts)
 {
 	char *p;
 	char *context = NULL, *defcontext = NULL;
 	char *fscontext = NULL, *rootcontext = NULL;
 	int rc, num_mnt_opts = 0;
+	struct security_mnt_opts *opts = *mnt_opts;
+
+	if (!opts) {
+		opts = kzalloc(sizeof(struct security_mnt_opts), GFP_KERNEL);
+		*mnt_opts = opts;
+		if (!opts)
+			return -ENOMEM;
+	}
 
 	opts->num_mnt_opts = 0;
 
@@ -1094,7 +1116,7 @@ static int selinux_parse_opts_str(char *options,
 	return 0;
 
 out_err:
-	security_free_mnt_opts(opts);
+	security_free_mnt_opts(mnt_opts);
 	kfree(context);
 	kfree(defcontext);
 	kfree(fscontext);
@@ -2714,7 +2736,7 @@ out:
 	return rc;
 }
 
-static int selinux_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
+static int selinux_sb_eat_lsm_opts(char *options, void **mnt_opts)
 {
 	char *s = (char *)get_zeroed_page(GFP_KERNEL);
 	int err;
@@ -2723,14 +2745,14 @@ static int selinux_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts
 		return -ENOMEM;
 	err = selinux_sb_copy_data(options, s);
 	if (!err)
-		err = selinux_parse_opts_str(s, opts);
+		err = selinux_parse_opts_str(s, mnt_opts);
 	free_page((unsigned long)s);
 	return err;
 }
 
-static int selinux_sb_remount(struct super_block *sb,
-			      struct security_mnt_opts *opts)
+static int selinux_sb_remount(struct super_block *sb, void *mnt_opts)
 {
+	struct security_mnt_opts *opts = mnt_opts;
 	int i, *flags;
 	char **mount_options;
 	struct superblock_security_struct *sbsec = sb->s_security;
@@ -2738,6 +2760,9 @@ static int selinux_sb_remount(struct super_block *sb,
 	if (!(sbsec->flags & SE_SBINITIALIZED))
 		return 0;
 
+	if (!opts)
+		return 0;
+
 	mount_options = opts->mnt_opts;
 	flags = opts->mnt_opts_flags;
 
@@ -6782,6 +6807,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(sb_alloc_security, selinux_sb_alloc_security),
 	LSM_HOOK_INIT(sb_free_security, selinux_sb_free_security),
 	LSM_HOOK_INIT(sb_eat_lsm_opts, selinux_sb_eat_lsm_opts),
+	LSM_HOOK_INIT(sb_free_mnt_opts, selinux_free_mnt_opts),
 	LSM_HOOK_INIT(sb_remount, selinux_sb_remount),
 	LSM_HOOK_INIT(sb_kern_mount, selinux_sb_kern_mount),
 	LSM_HOOK_INIT(sb_show_options, selinux_sb_show_options),
@@ -7051,11 +7077,7 @@ static __init int selinux_init(void)
 
 static void delayed_superblock_init(struct super_block *sb, void *unused)
 {
-	struct security_mnt_opts opts;
-
-	security_init_mnt_opts(&opts);
-	selinux_set_mnt_opts(sb, &opts, 0, NULL);
-	security_free_mnt_opts(&opts);
+	selinux_set_mnt_opts(sb, NULL, 0, NULL);
 }
 
 void selinux_complete_init(void)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 835cca277c2a..81a8112975d4 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -567,6 +567,19 @@ static void smack_sb_free_security(struct super_block *sb)
 	sb->s_security = NULL;
 }
 
+static void smack_free_mnt_opts(void *mnt_opts)
+{
+	struct security_mnt_opts *opts = mnt_opts;
+	int i;
+
+	if (opts->mnt_opts)
+		for (i = 0; i < opts->num_mnt_opts; i++)
+			kfree(opts->mnt_opts[i]);
+	kfree(opts->mnt_opts);
+	kfree(opts->mnt_opts_flags);
+	kfree(opts);
+}
+
 /**
  * smack_sb_copy_data - copy mount options data for processing
  * @orig: where to start
@@ -624,8 +637,9 @@ static int smack_sb_copy_data(char *orig, char *smackopts)
  * converts Smack specific mount options to generic security option format
  */
 static int smack_parse_opts_str(char *options,
-		struct security_mnt_opts *opts)
+		void **mnt_opts)
 {
+	struct security_mnt_opts *opts = *mnt_opts;
 	char *p;
 	char *fsdefault = NULL;
 	char *fsfloor = NULL;
@@ -636,11 +650,17 @@ static int smack_parse_opts_str(char *options,
 	int num_mnt_opts = 0;
 	int token;
 
-	opts->num_mnt_opts = 0;
-
 	if (!options)
 		return 0;
 
+	if (!opts) {
+		opts = kzalloc(sizeof(struct security_mnt_opts), GFP_KERNEL);
+		*mnt_opts = opts;
+		if (!opts)
+			return -ENOMEM;
+	}
+	opts->num_mnt_opts = 0;
+
 	while ((p = strsep(&options, ",")) != NULL) {
 		substring_t args[MAX_OPT_ARGS];
 
@@ -735,11 +755,11 @@ out_err:
 	kfree(fshat);
 	kfree(fsroot);
 	kfree(fstransmute);
-	security_free_mnt_opts(opts);
+	security_free_mnt_opts(mnt_opts);
 	return rc;
 }
 
-static int smack_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
+static int smack_sb_eat_lsm_opts(char *options, void **mnt_opts)
 {
 	char *s = (char *)get_zeroed_page(GFP_KERNEL);
 	int err;
@@ -748,7 +768,7 @@ static int smack_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
 		return -ENOMEM;
 	err = smack_sb_copy_data(options, s);
 	if (!err)
-		err = smack_parse_opts_str(s, opts);
+		err = smack_parse_opts_str(s, mnt_opts);
 	free_page((unsigned long)s);
 	return err;
 }
@@ -766,7 +786,7 @@ static int smack_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
  * labels.
  */
 static int smack_set_mnt_opts(struct super_block *sb,
-		struct security_mnt_opts *opts,
+		void *mnt_opts,
 		unsigned long kern_flags,
 		unsigned long *set_kern_flags)
 {
@@ -776,7 +796,8 @@ static int smack_set_mnt_opts(struct super_block *sb,
 	struct inode_smack *isp;
 	struct smack_known *skp;
 	int i;
-	int num_opts = opts->num_mnt_opts;
+	struct security_mnt_opts *opts = mnt_opts;
+	int num_opts = opts ? opts->num_mnt_opts : 0;
 	int transmute = 0;
 
 	if (sp->smk_flags & SMK_SB_INITIALIZED)
@@ -4651,6 +4672,7 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
 
 	LSM_HOOK_INIT(sb_alloc_security, smack_sb_alloc_security),
 	LSM_HOOK_INIT(sb_free_security, smack_sb_free_security),
+	LSM_HOOK_INIT(sb_free_mnt_opts, smack_free_mnt_opts),
 	LSM_HOOK_INIT(sb_eat_lsm_opts, smack_sb_eat_lsm_opts),
 	LSM_HOOK_INIT(sb_statfs, smack_sb_statfs),
 	LSM_HOOK_INIT(sb_set_mnt_opts, smack_set_mnt_opts),
-- 
cgit v1.2.3-59-g8ed1b


From 757cbe597fe8490c7c0a9650ebe5d60195f151d4 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 14 Dec 2018 23:42:21 -0500
Subject: LSM: new method: ->sb_add_mnt_opt()

Adding options to growing mnt_opts.  NFS kludge with passing
context= down into non-text-options mount switched to it, and
with that the last use of ->sb_parse_opts_str() is gone.

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/nfs/super.c             |  9 ++-------
 include/linux/lsm_hooks.h  |  5 +++--
 include/linux/security.h   |  6 ++++--
 security/security.c        |  8 +++++---
 security/selinux/hooks.c   | 45 +++++++++++++++++++--------------------------
 security/smack/smack_lsm.c |  1 -
 6 files changed, 33 insertions(+), 41 deletions(-)

(limited to 'security/security.c')

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 1943de8f9d29..073eec2366f8 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2070,14 +2070,9 @@ static int nfs23_validate_mount_data(void *options,
 		if (data->context[0]){
 #ifdef CONFIG_SECURITY_SELINUX
 			int rc;
-			char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL);
-			if (!opts_str)
-				return -ENOMEM;
-			strcpy(opts_str, "context=");
 			data->context[NFS_MAX_CONTEXT_LEN] = '\0';
-			strcat(opts_str, &data->context[0]);
-			rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts);
-			kfree(opts_str);
+			rc = security_add_mnt_opt("context", data->context,
+					strlen(data->context), &args->lsm_opts);
 			if (rc)
 				return rc;
 #else
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index a9c541f5732e..9a0bdf91e646 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1479,7 +1479,8 @@ union security_list_options {
 					struct super_block *newsb,
 					unsigned long kern_flags,
 					unsigned long *set_kern_flags);
-	int (*sb_parse_opts_str)(char *options, void **mnt_opts);
+	int (*sb_add_mnt_opt)(const char *option, const char *val, int len,
+			      void **mnt_opts);
 	int (*dentry_init_security)(struct dentry *dentry, int mode,
 					const struct qstr *name, void **ctx,
 					u32 *ctxlen);
@@ -1812,7 +1813,7 @@ struct security_hook_heads {
 	struct hlist_head sb_pivotroot;
 	struct hlist_head sb_set_mnt_opts;
 	struct hlist_head sb_clone_mnt_opts;
-	struct hlist_head sb_parse_opts_str;
+	struct hlist_head sb_add_mnt_opt;
 	struct hlist_head dentry_init_security;
 	struct hlist_head dentry_create_files_as;
 #ifdef CONFIG_SECURITY_PATH
diff --git a/include/linux/security.h b/include/linux/security.h
index ae8d5ac5882e..dbfb5a66babb 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -240,7 +240,8 @@ int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 				struct super_block *newsb,
 				unsigned long kern_flags,
 				unsigned long *set_kern_flags);
-int security_sb_parse_opts_str(char *options, void **mnt_opts);
+int security_add_mnt_opt(const char *option, const char *val,
+				int len, void **mnt_opts);
 int security_dentry_init_security(struct dentry *dentry, int mode,
 					const struct qstr *name, void **ctx,
 					u32 *ctxlen);
@@ -586,7 +587,8 @@ static inline int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 	return 0;
 }
 
-static inline int security_sb_parse_opts_str(char *options, void **mnt_opts)
+static inline int security_add_mnt_opt(const char *option, const char *val,
+					int len, void **mnt_opts)
 {
 	return 0;
 }
diff --git a/security/security.c b/security/security.c
index b7a5a0051807..c251278b0297 100644
--- a/security/security.c
+++ b/security/security.c
@@ -458,11 +458,13 @@ int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 }
 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 
-int security_sb_parse_opts_str(char *options, void **mnt_opts)
+int security_add_mnt_opt(const char *option, const char *val, int len,
+			 void **mnt_opts)
 {
-	return call_int_hook(sb_parse_opts_str, 0, options, mnt_opts);
+	return call_int_hook(sb_add_mnt_opt, -EINVAL,
+					option, val, len, mnt_opts);
 }
-EXPORT_SYMBOL(security_sb_parse_opts_str);
+EXPORT_SYMBOL(security_add_mnt_opt);
 
 int security_inode_alloc(struct inode *inode)
 {
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 5336d6671c5c..5bc230327bc0 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1049,40 +1049,33 @@ Einval:
 	return -EINVAL;
 }
 
-static int selinux_parse_opts_str(char *options,
-				  void **mnt_opts)
+static int selinux_add_mnt_opt(const char *option, const char *val, int len,
+			       void **mnt_opts)
 {
-	char *p = options, *next;
-	int rc;
-
-	/* Standard string-based options. */
-	for (p = options; *p; p = next) {
-		int token, len;
-		char *arg = NULL;
+	int token = Opt_error;
+	int rc, i;
 
-		next = strchr(p, '|');
-		if (next) {
-			len = next++ - p;
-		} else {
-			len = strlen(p);
-			next = p + len;
+	for (i = 0; i < ARRAY_SIZE(tokens); i++) {
+		if (strcmp(option, tokens[i].name) == 0) {
+			token = tokens[i].opt;
+			break;
 		}
+	}
 
-		if (!len)
-			continue;
+	if (token == Opt_error)
+		return -EINVAL;
 
-		token = match_opt_prefix(p, len, &arg);
-		if (arg)
-			arg = kmemdup_nul(arg, p + len - arg, GFP_KERNEL);
-		rc = selinux_add_opt(token, arg, mnt_opts);
-		if (rc) {
-			kfree(arg);
+	if (token != Opt_seclabel)
+		val = kmemdup_nul(val, len, GFP_KERNEL);
+	rc = selinux_add_opt(token, val, mnt_opts);
+	if (unlikely(rc)) {
+		kfree(val);
+		if (*mnt_opts) {
 			selinux_free_mnt_opts(*mnt_opts);
 			*mnt_opts = NULL;
-			return rc;
 		}
 	}
-	return 0;
+	return rc;
 }
 
 static int show_sid(struct seq_file *m, u32 sid)
@@ -6726,7 +6719,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(sb_umount, selinux_umount),
 	LSM_HOOK_INIT(sb_set_mnt_opts, selinux_set_mnt_opts),
 	LSM_HOOK_INIT(sb_clone_mnt_opts, selinux_sb_clone_mnt_opts),
-	LSM_HOOK_INIT(sb_parse_opts_str, selinux_parse_opts_str),
+	LSM_HOOK_INIT(sb_add_mnt_opt, selinux_add_mnt_opt),
 
 	LSM_HOOK_INIT(dentry_init_security, selinux_dentry_init_security),
 	LSM_HOOK_INIT(dentry_create_files_as, selinux_dentry_create_files_as),
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 99aec9f42be3..b607b1151e30 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -4629,7 +4629,6 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(sb_eat_lsm_opts, smack_sb_eat_lsm_opts),
 	LSM_HOOK_INIT(sb_statfs, smack_sb_statfs),
 	LSM_HOOK_INIT(sb_set_mnt_opts, smack_set_mnt_opts),
-	LSM_HOOK_INIT(sb_parse_opts_str, smack_parse_opts_str),
 
 	LSM_HOOK_INIT(bprm_set_creds, smack_bprm_set_creds),
 
-- 
cgit v1.2.3-59-g8ed1b