Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull security subsystem update from James Morris:
 "This is mostly maintenance updates across the subsystem, with a
  notable update for TPM 2.0, and addition of Jarkko Sakkinen as a
  maintainer of that"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (40 commits)
  apparmor: clarify CRYPTO dependency
  selinux: Use a kmem_cache for allocation struct file_security_struct
  selinux: ioctl_has_perm should be static
  selinux: use sprintf return value
  selinux: use kstrdup() in security_get_bools()
  selinux: use kmemdup in security_sid_to_context_core()
  selinux: remove pointless cast in selinux_inode_setsecurity()
  selinux: introduce security_context_str_to_sid
  selinux: do not check open perm on ftruncate call
  selinux: change CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE default
  KEYS: Merge the type-specific data with the payload data
  KEYS: Provide a script to extract a module signature
  KEYS: Provide a script to extract the sys cert list from a vmlinux file
  keys: Be more consistent in selection of union members used
  certs: add .gitignore to stop git nagging about x509_certificate_list
  KEYS: use kvfree() in add_key
  Smack: limited capability for changing process label
  TPM: remove unnecessary little endian conversion
  vTPM: support little endian guests
  char: Drop owner assignment from i2c_driver
  ...

5 files changed, 36 insertions, 45 deletions

diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
index bca1b74a4a2f..8691e92f27e5 100644
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
@@ -78,7 +78,7 @@ config SECURITY_SELINUX_CHECKREQPROT_VALUE
 	int "NSA SELinux checkreqprot default value"
 	depends on SECURITY_SELINUX
 	range 0 1
-	default 1
+	default 0
 	help
 	  This option sets the default value for the 'checkreqprot' flag
 	  that determines whether SELinux checks the protection requested
@@ -92,7 +92,7 @@ config SECURITY_SELINUX_CHECKREQPROT_VALUE
 	  'checkreqprot=' boot parameter.  It may also be changed at runtime
 	  via /selinux/checkreqprot if authorized by policy.
 
-	  If you are unsure how to answer this question, answer 1.
+	  If you are unsure how to answer this question, answer 0.
 
 config SECURITY_SELINUX_POLICYDB_VERSION_MAX
 	bool "NSA SELinux maximum supported policy format version"
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 26f4039d54b8..9e591e5989be 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -126,6 +126,7 @@ int selinux_enabled = 1;
 #endif
 
 static struct kmem_cache *sel_inode_cache;
+static struct kmem_cache *file_security_cache;
 
 /**
  * selinux_secmark_enabled - Check to see if SECMARK is currently enabled
@@ -287,7 +288,7 @@ static int file_alloc_security(struct file *file)
 	struct file_security_struct *fsec;
 	u32 sid = current_sid();
 
-	fsec = kzalloc(sizeof(struct file_security_struct), GFP_KERNEL);
+	fsec = kmem_cache_zalloc(file_security_cache, GFP_KERNEL);
 	if (!fsec)
 		return -ENOMEM;
 
@@ -302,7 +303,7 @@ static void file_free_security(struct file *file)
 {
 	struct file_security_struct *fsec = file->f_security;
 	file->f_security = NULL;
-	kfree(fsec);
+	kmem_cache_free(file_security_cache, fsec);
 }
 
 static int superblock_alloc_security(struct super_block *sb)
@@ -674,10 +675,9 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 
 		if (flags[i] == SBLABEL_MNT)
 			continue;
-		rc = security_context_to_sid(mount_options[i],
-					     strlen(mount_options[i]), &sid, GFP_KERNEL);
+		rc = security_context_str_to_sid(mount_options[i], &sid, GFP_KERNEL);
 		if (rc) {
-			printk(KERN_WARNING "SELinux: security_context_to_sid"
+			printk(KERN_WARNING "SELinux: security_context_str_to_sid"
 			       "(%s) failed for (dev %s, type %s) errno=%d\n",
 			       mount_options[i], sb->s_id, name, rc);
 			goto out;
@@ -2617,15 +2617,12 @@ static int selinux_sb_remount(struct super_block *sb, void *data)
 
 	for (i = 0; i < opts.num_mnt_opts; i++) {
 		u32 sid;
-		size_t len;
 
 		if (flags[i] == SBLABEL_MNT)
 			continue;
-		len = strlen(mount_options[i]);
-		rc = security_context_to_sid(mount_options[i], len, &sid,
-					     GFP_KERNEL);
+		rc = security_context_str_to_sid(mount_options[i], &sid, GFP_KERNEL);
 		if (rc) {
-			printk(KERN_WARNING "SELinux: security_context_to_sid"
+			printk(KERN_WARNING "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;
@@ -2946,7 +2943,8 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 			ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET))
 		return dentry_has_perm(cred, dentry, FILE__SETATTR);
 
-	if (selinux_policycap_openperm && (ia_valid & ATTR_SIZE))
+	if (selinux_policycap_openperm && (ia_valid & ATTR_SIZE)
+			&& !(ia_valid & ATTR_FILE))
 		av |= FILE__OPEN;
 
 	return dentry_has_perm(cred, dentry, av);
@@ -3166,7 +3164,7 @@ static int selinux_inode_setsecurity(struct inode *inode, const char *name,
 	if (!value || !size)
 		return -EACCES;
 
-	rc = security_context_to_sid((void *)value, size, &newsid, GFP_KERNEL);
+	rc = security_context_to_sid(value, size, &newsid, GFP_KERNEL);
 	if (rc)
 		return rc;
 
@@ -3238,7 +3236,7 @@ static void selinux_file_free_security(struct file *file)
  * Check whether a task has the ioctl permission and cmd
  * operation to an inode.
  */
-int ioctl_has_perm(const struct cred *cred, struct file *file,
+static int ioctl_has_perm(const struct cred *cred, struct file *file,
 		u32 requested, u16 cmd)
 {
 	struct common_audit_data ad;
@@ -6093,6 +6091,9 @@ static __init int selinux_init(void)
 	sel_inode_cache = kmem_cache_create("selinux_inode_security",
 					    sizeof(struct inode_security_struct),
 					    0, SLAB_PANIC, NULL);
+	file_security_cache = kmem_cache_create("selinux_file_security",
+					    sizeof(struct file_security_struct),
+					    0, SLAB_PANIC, NULL);
 	avc_init();
 
 	security_add_hooks(selinux_hooks, ARRAY_SIZE(selinux_hooks));
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 6a681d26bf20..223e9fd15d66 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -166,6 +166,8 @@ int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
 int security_context_to_sid(const char *scontext, u32 scontext_len,
 			    u32 *out_sid, gfp_t gfp);
 
+int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
+
 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 				    u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 5bed7716f8ab..c02da25d7b63 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -731,13 +731,11 @@ static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
 	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
 		goto out;
 
-	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL);
 	if (length)
 		goto out;
 
-	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL);
 	if (length)
 		goto out;
 
@@ -819,13 +817,11 @@ static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
 		objname = namebuf;
 	}
 
-	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL);
 	if (length)
 		goto out;
 
-	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL);
 	if (length)
 		goto out;
 
@@ -882,13 +878,11 @@ static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size)
 	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
 		goto out;
 
-	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL);
 	if (length)
 		goto out;
 
-	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL);
 	if (length)
 		goto out;
 
@@ -940,7 +934,7 @@ static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
 	if (sscanf(buf, "%s %s", con, user) != 2)
 		goto out;
 
-	length = security_context_to_sid(con, strlen(con) + 1, &sid, GFP_KERNEL);
+	length = security_context_str_to_sid(con, &sid, GFP_KERNEL);
 	if (length)
 		goto out;
 
@@ -1000,13 +994,11 @@ static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
 	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
 		goto out;
 
-	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL);
 	if (length)
 		goto out;
 
-	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
-					 GFP_KERNEL);
+	length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL);
 	if (length)
 		goto out;
 
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index b7df12ba61d8..ebb5eb3c318c 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1218,13 +1218,10 @@ static int context_struct_to_string(struct context *context, char **scontext, u3
 	/*
 	 * Copy the user name, role name and type name into the context.
 	 */
-	sprintf(scontextp, "%s:%s:%s",
+	scontextp += sprintf(scontextp, "%s:%s:%s",
 		sym_name(&policydb, SYM_USERS, context->user - 1),
 		sym_name(&policydb, SYM_ROLES, context->role - 1),
 		sym_name(&policydb, SYM_TYPES, context->type - 1));
-	scontextp += strlen(sym_name(&policydb, SYM_USERS, context->user - 1)) +
-		     1 + strlen(sym_name(&policydb, SYM_ROLES, context->role - 1)) +
-		     1 + strlen(sym_name(&policydb, SYM_TYPES, context->type - 1));
 
 	mls_sid_to_context(context, &scontextp);
 
@@ -1259,12 +1256,12 @@ static int security_sid_to_context_core(u32 sid, char **scontext,
 			*scontext_len = strlen(initial_sid_to_string[sid]) + 1;
 			if (!scontext)
 				goto out;
-			scontextp = kmalloc(*scontext_len, GFP_ATOMIC);
+			scontextp = kmemdup(initial_sid_to_string[sid],
+					    *scontext_len, GFP_ATOMIC);
 			if (!scontextp) {
 				rc = -ENOMEM;
 				goto out;
 			}
-			strcpy(scontextp, initial_sid_to_string[sid]);
 			*scontext = scontextp;
 			goto out;
 		}
@@ -1476,6 +1473,11 @@ int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid,
 					    sid, SECSID_NULL, gfp, 0);
 }
 
+int security_context_str_to_sid(const char *scontext, u32 *sid, gfp_t gfp)
+{
+	return security_context_to_sid(scontext, strlen(scontext), sid, gfp);
+}
+
 /**
  * security_context_to_sid_default - Obtain a SID for a given security context,
  * falling back to specified default if needed.
@@ -2604,18 +2606,12 @@ int security_get_bools(int *len, char ***names, int **values)
 		goto err;
 
 	for (i = 0; i < *len; i++) {
-		size_t name_len;
-
 		(*values)[i] = policydb.bool_val_to_struct[i]->state;
-		name_len = strlen(sym_name(&policydb, SYM_BOOLS, i)) + 1;
 
 		rc = -ENOMEM;
-		(*names)[i] = kmalloc(sizeof(char) * name_len, GFP_ATOMIC);
+		(*names)[i] = kstrdup(sym_name(&policydb, SYM_BOOLS, i), GFP_ATOMIC);
 		if (!(*names)[i])
 			goto err;
-
-		strncpy((*names)[i], sym_name(&policydb, SYM_BOOLS, i), name_len);
-		(*names)[i][name_len - 1] = 0;
 	}
 	rc = 0;
 out: