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-rw-r--r--security/selinux/hooks.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 4130d64..85f74f6 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -556,13 +556,15 @@ static int selinux_set_mnt_opts(struct super_block *sb,
struct task_security_struct *tsec = current->security;
struct superblock_security_struct *sbsec = sb->s_security;
const char *name = sb->s_type->name;
- struct inode *inode = sbsec->sb->s_root->d_inode;
- struct inode_security_struct *root_isec = inode->i_security;
+ struct dentry *root = sb->s_root;
+ struct inode *root_inode = root->d_inode;
+ struct inode_security_struct *root_isec = root_inode->i_security;
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;
+ bool can_xattr = false;
mutex_lock(&sbsec->lock);
@@ -666,14 +668,24 @@ static int selinux_set_mnt_opts(struct super_block *sb,
goto out;
}
- if (strcmp(sb->s_type->name, "proc") == 0)
+ if (strcmp(name, "proc") == 0)
sbsec->proc = 1;
+ /*
+ * test if the fs supports xattrs, fs_use might make use of this if the
+ * fs has no definition in policy.
+ */
+ if (root_inode->i_op->getxattr) {
+ rc = root_inode->i_op->getxattr(root, XATTR_NAME_SELINUX, NULL, 0);
+ if (rc >= 0 || rc == -ENODATA)
+ can_xattr = true;
+ }
+
/* Determine the labeling behavior to use for this filesystem type. */
- rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
+ rc = security_fs_use(name, &sbsec->behavior, &sbsec->sid, can_xattr);
if (rc) {
printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
- __func__, sb->s_type->name, rc);
+ __func__, name, rc);
goto out;
}
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