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Revert "SELinux: allow fstype unknown to policy to use xattrs if present"

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This reverts commit 811f379927.

From Eric Paris:

"Please drop this patch for now.  It deadlocks on ntfs-3g.  I need to
rework it to handle fuse filesystems better.  (casey was right)"
This commit is contained in:
James Morris
2008-07-15 18:32:49 +10:00
parent 50515af207
commit 089be43e40
3 changed files with 14 additions and 37 deletions
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22
security/selinux/hooks.c
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@@ -555,15 +555,13 @@ 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 dentry *root = sb->s_root;
struct inode *root_inode = root->d_inode;
struct inode_security_struct *root_isec = root_inode->i_security;
struct inode *inode = sbsec->sb->s_root->d_inode;
struct inode_security_struct *root_isec = 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);
@@ -667,24 +665,14 @@ static int selinux_set_mnt_opts(struct super_block *sb,
goto out;
}
if (strcmp(name, "proc") == 0)
if (strcmp(sb->s_type->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(name, &sbsec->behavior, &sbsec->sid, can_xattr);
rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
if (rc) {
printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
__func__, name, rc);
__func__, sb->s_type->name, rc);
goto out;
}