---

yaml
---
r: 132574
b: refs/heads/master
c: 11689d4
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0d90a7ec48c704025307b129413bc62451b20ab3
+refs/heads/master: 11689d47f0957121920c9ec646eb5d838755853a

trunk/security/selinux/hooks.c

@@ -89,7 +89,7 @@
 #define XATTR_SELINUX_SUFFIX "selinux"
 #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
 
-#define NUM_SEL_MNT_OPTS 4
+#define NUM_SEL_MNT_OPTS 5
 
 extern unsigned int policydb_loaded_version;
 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
@@ -353,13 +353,15 @@ enum {
 	Opt_fscontext = 2,
 	Opt_defcontext = 3,
 	Opt_rootcontext = 4,
+	Opt_labelsupport = 5,
 };
 
 static const match_table_t tokens = {
 	{Opt_context, CONTEXT_STR "%s"},
 	{Opt_fscontext, FSCONTEXT_STR "%s"},
 	{Opt_defcontext, DEFCONTEXT_STR "%s"},
 	{Opt_rootcontext, ROOTCONTEXT_STR "%s"},
+	{Opt_labelsupport, LABELSUPP_STR},
 	{Opt_error, NULL},
 };
 
@@ -431,7 +433,7 @@ static int sb_finish_set_opts(struct super_block *sb)
 		}
 	}
 
-	sbsec->flags |= SE_SBINITIALIZED;
+	sbsec->flags |= (SE_SBINITIALIZED | SE_SBLABELSUPP);
 
 	if (sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
 		printk(KERN_ERR "SELinux: initialized (dev %s, type %s), unknown behavior\n",
@@ -441,6 +443,12 @@ static int sb_finish_set_opts(struct super_block *sb)
 		       sb->s_id, sb->s_type->name,
 		       labeling_behaviors[sbsec->behavior-1]);
 
+	if (sbsec->behavior == SECURITY_FS_USE_GENFS ||
+	    sbsec->behavior == SECURITY_FS_USE_MNTPOINT ||
+	    sbsec->behavior == SECURITY_FS_USE_NONE ||
+	    sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
+		sbsec->flags &= ~SE_SBLABELSUPP;
+
 	/* Initialize the root inode. */
 	rc = inode_doinit_with_dentry(root_inode, root);
 
@@ -500,6 +508,9 @@ static int selinux_get_mnt_opts(const struct super_block *sb,
 			opts->num_mnt_opts++;
 		tmp >>= 1;
 	}
+	/* Check if the Label support flag is set */
+	if (sbsec->flags & SE_SBLABELSUPP)
+		opts->num_mnt_opts++;
 
 	opts->mnt_opts = kcalloc(opts->num_mnt_opts, sizeof(char *), GFP_ATOMIC);
 	if (!opts->mnt_opts) {
@@ -545,6 +556,10 @@ static int selinux_get_mnt_opts(const struct super_block *sb,
 		opts->mnt_opts[i] = context;
 		opts->mnt_opts_flags[i++] = ROOTCONTEXT_MNT;
 	}
+	if (sbsec->flags & SE_SBLABELSUPP) {
+		opts->mnt_opts[i] = NULL;
+		opts->mnt_opts_flags[i++] = SE_SBLABELSUPP;
+	}
 
 	BUG_ON(i != opts->num_mnt_opts);
 
@@ -635,6 +650,9 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 	 */
 	for (i = 0; i < num_opts; i++) {
 		u32 sid;
+
+		if (flags[i] == SE_SBLABELSUPP)
+			continue;
 		rc = security_context_to_sid(mount_options[i],
 					     strlen(mount_options[i]), &sid);
 		if (rc) {
@@ -915,7 +933,8 @@ static int selinux_parse_opts_str(char *options,
 				goto out_err;
 			}
 			break;
-
+		case Opt_labelsupport:
+			break;
 		default:
 			rc = -EINVAL;
 			printk(KERN_WARNING "SELinux:  unknown mount option\n");
@@ -997,7 +1016,12 @@ static void selinux_write_opts(struct seq_file *m,
 	char *prefix;
 
 	for (i = 0; i < opts->num_mnt_opts; i++) {
-		char *has_comma = strchr(opts->mnt_opts[i], ',');
+		char *has_comma;
+
+		if (opts->mnt_opts[i])
+			has_comma = strchr(opts->mnt_opts[i], ',');
+		else
+			has_comma = NULL;
 
 		switch (opts->mnt_opts_flags[i]) {
 		case CONTEXT_MNT:
@@ -1012,6 +1036,10 @@ static void selinux_write_opts(struct seq_file *m,
 		case DEFCONTEXT_MNT:
 			prefix = DEFCONTEXT_STR;
 			break;
+		case SE_SBLABELSUPP:
+			seq_putc(m, ',');
+			seq_puts(m, LABELSUPP_STR);
+			continue;
 		default:
 			BUG();
 		};
@@ -2398,7 +2426,8 @@ static inline int selinux_option(char *option, int len)
 	return (match_prefix(CONTEXT_STR, sizeof(CONTEXT_STR)-1, option, len) ||
 		match_prefix(FSCONTEXT_STR, sizeof(FSCONTEXT_STR)-1, option, len) ||
 		match_prefix(DEFCONTEXT_STR, sizeof(DEFCONTEXT_STR)-1, option, len) ||
-		match_prefix(ROOTCONTEXT_STR, sizeof(ROOTCONTEXT_STR)-1, option, len));
+		match_prefix(ROOTCONTEXT_STR, sizeof(ROOTCONTEXT_STR)-1, option, len) ||
+		match_prefix(LABELSUPP_STR, sizeof(LABELSUPP_STR)-1, option, len));
 }
 
 static inline void take_option(char **to, char *from, int *first, int len)

trunk/security/selinux/include/security.h

@@ -47,11 +47,13 @@
 /* Non-mount related flags */
 #define SE_SBINITIALIZED	0x10
 #define SE_SBPROC		0x20
+#define SE_SBLABELSUPP	0x40
 
 #define CONTEXT_STR	"context="
 #define FSCONTEXT_STR	"fscontext="
 #define ROOTCONTEXT_STR	"rootcontext="
 #define DEFCONTEXT_STR	"defcontext="
+#define LABELSUPP_STR "seclabel"
 
 struct netlbl_lsm_secattr;