diff mbox series

[v2,11/39] attr: handle idmapped mounts

Message ID 20201115103718.298186-12-christian.brauner@ubuntu.com (mailing list archive)
State New
Headers show
Series fs: idmapped mounts | expand

Commit Message

Christian Brauner Nov. 15, 2020, 10:36 a.m. UTC
When file attributes are changed filesystems mostly rely on the
setattr_prepare(), setattr_copy(), and notify_change() helpers for
initialization and permission checking. Let them handle idmapped mounts. If
the inode is accessed through an idmapped mount we need to map it according
to the mount's user namespace. Afterwards the checks are identical to
non-idmapped mounts. If the initial user namespace is passed all operations
are a nop so non-idmapped mounts will not see a change in behavior and will
also not see any performance impact. Helpers that perform checks on the
ia_uid and ia_gid fields in struct iattr assume that ia_uid and ia_gid are
intended values and so they won't be mapped according to the mount's user
namespace. This is more transparent to the caller.
If the initial user namespace is passed all operations are a nop so
non-idmapped mounts will not see a change in behavior and will not see any
performance impact.

Cc: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
/* v2 */
- Christoph Hellwig:
  - Don't pollute the vfs with additional helpers simply extend the existing
    helpers with an additional argument and switch all callers.
---
 arch/powerpc/platforms/cell/spufs/inode.c |  2 +-
 drivers/base/devtmpfs.c                   |  4 +-
 fs/9p/vfs_inode.c                         |  4 +-
 fs/9p/vfs_inode_dotl.c                    |  4 +-
 fs/adfs/inode.c                           |  2 +-
 fs/affs/inode.c                           |  4 +-
 fs/attr.c                                 | 71 ++++++++++++++---------
 fs/btrfs/inode.c                          |  4 +-
 fs/cachefiles/interface.c                 |  4 +-
 fs/ceph/inode.c                           |  2 +-
 fs/cifs/inode.c                           |  8 +--
 fs/ecryptfs/inode.c                       |  6 +-
 fs/exfat/file.c                           |  4 +-
 fs/ext2/inode.c                           |  4 +-
 fs/ext4/inode.c                           |  4 +-
 fs/f2fs/file.c                            |  2 +-
 fs/fat/file.c                             |  4 +-
 fs/fuse/dir.c                             |  2 +-
 fs/gfs2/inode.c                           |  4 +-
 fs/hfs/inode.c                            |  4 +-
 fs/hfsplus/inode.c                        |  4 +-
 fs/hostfs/hostfs_kern.c                   |  4 +-
 fs/hpfs/inode.c                           |  4 +-
 fs/hugetlbfs/inode.c                      |  4 +-
 fs/inode.c                                |  2 +-
 fs/jffs2/fs.c                             |  2 +-
 fs/jfs/file.c                             |  4 +-
 fs/kernfs/inode.c                         |  4 +-
 fs/libfs.c                                |  4 +-
 fs/minix/file.c                           |  4 +-
 fs/nfsd/nfsproc.c                         |  2 +-
 fs/nfsd/vfs.c                             |  4 +-
 fs/nilfs2/inode.c                         |  4 +-
 fs/ntfs/inode.c                           |  2 +-
 fs/ocfs2/dlmfs/dlmfs.c                    |  4 +-
 fs/ocfs2/file.c                           |  4 +-
 fs/omfs/file.c                            |  4 +-
 fs/open.c                                 |  6 +-
 fs/orangefs/inode.c                       |  4 +-
 fs/overlayfs/copy_up.c                    |  8 +--
 fs/overlayfs/dir.c                        |  2 +-
 fs/overlayfs/inode.c                      |  4 +-
 fs/overlayfs/super.c                      |  2 +-
 fs/proc/base.c                            |  4 +-
 fs/proc/generic.c                         |  4 +-
 fs/proc/proc_sysctl.c                     |  4 +-
 fs/ramfs/file-nommu.c                     |  4 +-
 fs/reiserfs/inode.c                       |  4 +-
 fs/sysv/file.c                            |  4 +-
 fs/ubifs/file.c                           |  2 +-
 fs/udf/file.c                             |  4 +-
 fs/ufs/inode.c                            |  4 +-
 fs/utimes.c                               |  2 +-
 fs/xfs/xfs_iops.c                         |  2 +-
 fs/zonefs/super.c                         |  4 +-
 include/linux/fs.h                        |  8 ++-
 mm/shmem.c                                |  4 +-
 57 files changed, 151 insertions(+), 132 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 25390569e24c..3de526eb2275 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -98,7 +98,7 @@  spufs_setattr(struct dentry *dentry, struct iattr *attr)
 	if ((attr->ia_valid & ATTR_SIZE) &&
 	    (attr->ia_size != inode->i_size))
 		return -EINVAL;
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index eac184e6d657..2e0c3cdb4184 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -221,7 +221,7 @@  static int handle_create(const char *nodename, umode_t mode, kuid_t uid,
 		newattrs.ia_gid = gid;
 		newattrs.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID;
 		inode_lock(d_inode(dentry));
-		notify_change(dentry, &newattrs, NULL);
+		notify_change(&init_user_ns, dentry, &newattrs, NULL);
 		inode_unlock(d_inode(dentry));
 
 		/* mark as kernel-created inode */
@@ -328,7 +328,7 @@  static int handle_remove(const char *nodename, struct device *dev)
 			newattrs.ia_valid =
 				ATTR_UID|ATTR_GID|ATTR_MODE;
 			inode_lock(d_inode(dentry));
-			notify_change(dentry, &newattrs, NULL);
+			notify_change(&init_user_ns, dentry, &newattrs, NULL);
 			inode_unlock(d_inode(dentry));
 			err = vfs_unlink(d_inode(parent.dentry), dentry, NULL);
 			if (!err || err == -ENOENT)
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index f058e89df30f..404526499c94 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1040,7 +1040,7 @@  static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct p9_wstat wstat;
 
 	p9_debug(P9_DEBUG_VFS, "\n");
-	retval = setattr_prepare(dentry, iattr);
+	retval = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (retval)
 		return retval;
 
@@ -1090,7 +1090,7 @@  static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 
 	v9fs_invalidate_inode_attr(d_inode(dentry));
 
-	setattr_copy(d_inode(dentry), iattr);
+	setattr_copy(&init_user_ns, d_inode(dentry), iattr);
 	mark_inode_dirty(d_inode(dentry));
 	return 0;
 }
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 0028eccb665a..282ec5cb45dc 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -546,7 +546,7 @@  int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
 
 	p9_debug(P9_DEBUG_VFS, "\n");
 
-	retval = setattr_prepare(dentry, iattr);
+	retval = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (retval)
 		return retval;
 
@@ -582,7 +582,7 @@  int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
 		truncate_setsize(inode, iattr->ia_size);
 
 	v9fs_invalidate_inode_attr(inode);
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	mark_inode_dirty(inode);
 	if (iattr->ia_valid & ATTR_MODE) {
 		/* We also want to update ACL when we update mode bits */
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index 32620f4a7623..278dcee6ae22 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -299,7 +299,7 @@  adfs_notify_change(struct dentry *dentry, struct iattr *attr)
 	unsigned int ia_valid = attr->ia_valid;
 	int error;
 	
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 
 	/*
 	 * we can't change the UID or GID of any file -
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 044412110b52..767e5bdfb703 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -223,7 +223,7 @@  affs_notify_change(struct dentry *dentry, struct iattr *attr)
 
 	pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		goto out;
 
@@ -249,7 +249,7 @@  affs_notify_change(struct dentry *dentry, struct iattr *attr)
 		affs_truncate(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 
 	if (attr->ia_valid & ATTR_MODE)
diff --git a/fs/attr.c b/fs/attr.c
index 00ae0b000146..4b36440236d4 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -18,27 +18,31 @@ 
 #include <linux/evm.h>
 #include <linux/ima.h>
 
-static bool chown_ok(const struct inode *inode, kuid_t uid)
+static bool chown_ok(struct user_namespace *user_ns,
+		     const struct inode *inode,
+		     kuid_t uid)
 {
-	if (uid_eq(current_fsuid(), inode->i_uid) &&
-	    uid_eq(uid, inode->i_uid))
+	kuid_t kuid = i_uid_into_mnt(user_ns, inode);
+	if (uid_eq(current_fsuid(), kuid) && uid_eq(uid, kuid))
 		return true;
-	if (capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_CHOWN))
+	if (capable_wrt_inode_uidgid(user_ns, inode, CAP_CHOWN))
 		return true;
-	if (uid_eq(inode->i_uid, INVALID_UID) &&
+	if (uid_eq(kuid, INVALID_UID) &&
 	    ns_capable(inode->i_sb->s_user_ns, CAP_CHOWN))
 		return true;
 	return false;
 }
 
-static bool chgrp_ok(const struct inode *inode, kgid_t gid)
+static bool chgrp_ok(struct user_namespace *user_ns,
+		     const struct inode *inode, kgid_t gid)
 {
-	if (uid_eq(current_fsuid(), inode->i_uid) &&
-	    (in_group_p(gid) || gid_eq(gid, inode->i_gid)))
+	kgid_t kgid = i_gid_into_mnt(user_ns, inode);
+	if (uid_eq(current_fsuid(), i_uid_into_mnt(user_ns, inode)) &&
+	    (in_group_p(gid) || gid_eq(gid, kgid)))
 		return true;
-	if (capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_CHOWN))
+	if (capable_wrt_inode_uidgid(user_ns, inode, CAP_CHOWN))
 		return true;
-	if (gid_eq(inode->i_gid, INVALID_GID) &&
+	if (gid_eq(kgid, INVALID_GID) &&
 	    ns_capable(inode->i_sb->s_user_ns, CAP_CHOWN))
 		return true;
 	return false;
@@ -46,6 +50,7 @@  static bool chgrp_ok(const struct inode *inode, kgid_t gid)
 
 /**
  * setattr_prepare - check if attribute changes to a dentry are allowed
+ * @user_ns:	user namespace of the mount
  * @dentry:	dentry to check
  * @attr:	attributes to change
  *
@@ -58,7 +63,8 @@  static bool chgrp_ok(const struct inode *inode, kgid_t gid)
  * Should be called as the first thing in ->setattr implementations,
  * possibly after taking additional locks.
  */
-int setattr_prepare(struct dentry *dentry, struct iattr *attr)
+int setattr_prepare(struct user_namespace *user_ns, struct dentry *dentry,
+		    struct iattr *attr)
 {
 	struct inode *inode = d_inode(dentry);
 	unsigned int ia_valid = attr->ia_valid;
@@ -78,27 +84,27 @@  int setattr_prepare(struct dentry *dentry, struct iattr *attr)
 		goto kill_priv;
 
 	/* Make sure a caller can chown. */
-	if ((ia_valid & ATTR_UID) && !chown_ok(inode, attr->ia_uid))
+	if ((ia_valid & ATTR_UID) && !chown_ok(user_ns, inode, attr->ia_uid))
 		return -EPERM;
 
 	/* Make sure caller can chgrp. */
-	if ((ia_valid & ATTR_GID) && !chgrp_ok(inode, attr->ia_gid))
+	if ((ia_valid & ATTR_GID) && !chgrp_ok(user_ns, inode, attr->ia_gid))
 		return -EPERM;
 
 	/* Make sure a caller can chmod. */
 	if (ia_valid & ATTR_MODE) {
-		if (!inode_owner_or_capable(&init_user_ns, inode))
+		if (!inode_owner_or_capable(user_ns, inode))
 			return -EPERM;
 		/* Also check the setgid bit! */
-		if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
-				inode->i_gid) &&
-		    !capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_FSETID))
+               if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
+                                i_gid_into_mnt(user_ns, inode)) &&
+                    !capable_wrt_inode_uidgid(user_ns, inode, CAP_FSETID))
 			attr->ia_mode &= ~S_ISGID;
 	}
 
 	/* Check for setting the inode time. */
 	if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) {
-		if (!inode_owner_or_capable(&init_user_ns, inode))
+		if (!inode_owner_or_capable(user_ns, inode))
 			return -EPERM;
 	}
 
@@ -162,20 +168,27 @@  EXPORT_SYMBOL(inode_newsize_ok);
 
 /**
  * setattr_copy - copy simple metadata updates into the generic inode
+ * @user_ns:	the user namespace the inode is accessed from
  * @inode:	the inode to be updated
  * @attr:	the new attributes
  *
  * setattr_copy must be called with i_mutex held.
  *
  * setattr_copy updates the inode's metadata with that specified
- * in attr. Noticeably missing is inode size update, which is more complex
+ * in attr on idmapped mounts. If file ownership is changed setattr_copy
+ * doesn't map ia_uid and ia_gid. It will asssume the caller has already
+ * provided the intended values. Necessary permission checks to determine
+ * whether or not the S_ISGID property needs to be removed are performed with
+ * the correct idmapped mount permission helpers.
+ * Noticeably missing is inode size update, which is more complex
  * as it requires pagecache updates.
  *
  * The inode is not marked as dirty after this operation. The rationale is
  * that for "simple" filesystems, the struct inode is the inode storage.
  * The caller is free to mark the inode dirty afterwards if needed.
  */
-void setattr_copy(struct inode *inode, const struct iattr *attr)
+void setattr_copy(struct user_namespace *user_ns, struct inode *inode,
+		  const struct iattr *attr)
 {
 	unsigned int ia_valid = attr->ia_valid;
 
@@ -191,9 +204,9 @@  void setattr_copy(struct inode *inode, const struct iattr *attr)
 		inode->i_ctime = attr->ia_ctime;
 	if (ia_valid & ATTR_MODE) {
 		umode_t mode = attr->ia_mode;
-
-		if (!in_group_p(inode->i_gid) &&
-		    !capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_FSETID))
+		kgid_t kgid = i_gid_into_mnt(user_ns, inode);
+		if (!in_group_p(kgid) &&
+		    !capable_wrt_inode_uidgid(user_ns, inode, CAP_FSETID))
 			mode &= ~S_ISGID;
 		inode->i_mode = mode;
 	}
@@ -202,6 +215,7 @@  EXPORT_SYMBOL(setattr_copy);
 
 /**
  * notify_change - modify attributes of a filesytem object
+ * @user_ns:	the user namespace of the mount
  * @dentry:	object affected
  * @attr:	new attributes
  * @delegated_inode: returns inode, if the inode is delegated
@@ -214,13 +228,17 @@  EXPORT_SYMBOL(setattr_copy);
  * retry.  Because breaking a delegation may take a long time, the
  * caller should drop the i_mutex before doing so.
  *
+ * If file ownership is changed notify_change() doesn't map ia_uid and
+ * ia_gid. It will asssume the caller has already provided the intended values.
+ *
  * Alternatively, a caller may pass NULL for delegated_inode.  This may
  * be appropriate for callers that expect the underlying filesystem not
  * to be NFS exported.  Also, passing NULL is fine for callers holding
  * the file open for write, as there can be no conflicting delegation in
  * that case.
  */
-int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **delegated_inode)
+int notify_change(struct user_namespace *user_ns, struct dentry *dentry,
+		  struct iattr *attr, struct inode **delegated_inode)
 {
 	struct inode *inode = dentry->d_inode;
 	umode_t mode = inode->i_mode;
@@ -243,9 +261,8 @@  int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de
 		if (IS_IMMUTABLE(inode))
 			return -EPERM;
 
-		if (!inode_owner_or_capable(&init_user_ns, inode)) {
-			error = inode_permission(&init_user_ns, inode,
-						 MAY_WRITE);
+		if (!inode_owner_or_capable(user_ns, inode)) {
+			error = inode_permission(user_ns, inode, MAY_WRITE);
 			if (error)
 				return error;
 		}
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ed1a5bf5f068..e65c54b7e828 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4875,7 +4875,7 @@  static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
 	if (btrfs_root_readonly(root))
 		return -EROFS;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		return err;
 
@@ -4886,7 +4886,7 @@  static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
 	}
 
 	if (attr->ia_valid) {
-		setattr_copy(inode, attr);
+		setattr_copy(&init_user_ns, inode, attr);
 		inode_inc_iversion(inode);
 		err = btrfs_dirty_inode(inode);
 
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index 4cea5fbf695e..5efa6a3702c0 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -470,14 +470,14 @@  static int cachefiles_attr_changed(struct fscache_object *_object)
 		_debug("discard tail %llx", oi_size);
 		newattrs.ia_valid = ATTR_SIZE;
 		newattrs.ia_size = oi_size & PAGE_MASK;
-		ret = notify_change(object->backer, &newattrs, NULL);
+		ret = notify_change(&init_user_ns, object->backer, &newattrs, NULL);
 		if (ret < 0)
 			goto truncate_failed;
 	}
 
 	newattrs.ia_valid = ATTR_SIZE;
 	newattrs.ia_size = ni_size;
-	ret = notify_change(object->backer, &newattrs, NULL);
+	ret = notify_change(&init_user_ns, object->backer, &newattrs, NULL);
 
 truncate_failed:
 	inode_unlock(d_inode(object->backer));
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index abfe42df8a1a..06645c2efa6f 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2251,7 +2251,7 @@  int ceph_setattr(struct dentry *dentry, struct iattr *attr)
 	if (ceph_snap(inode) != CEPH_NOSNAP)
 		return -EROFS;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err != 0)
 		return err;
 
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 9ee5f304592f..4d69b786e403 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -2602,7 +2602,7 @@  cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
 		attrs->ia_valid |= ATTR_FORCE;
 
-	rc = setattr_prepare(direntry, attrs);
+	rc = setattr_prepare(&init_user_ns, direntry, attrs);
 	if (rc < 0)
 		goto out;
 
@@ -2707,7 +2707,7 @@  cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
 	    attrs->ia_size != i_size_read(inode))
 		truncate_setsize(inode, attrs->ia_size);
 
-	setattr_copy(inode, attrs);
+	setattr_copy(&init_user_ns, inode, attrs);
 	mark_inode_dirty(inode);
 
 	/* force revalidate when any of these times are set since some
@@ -2749,7 +2749,7 @@  cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
 		attrs->ia_valid |= ATTR_FORCE;
 
-	rc = setattr_prepare(direntry, attrs);
+	rc = setattr_prepare(&init_user_ns, direntry, attrs);
 	if (rc < 0) {
 		free_xid(xid);
 		return rc;
@@ -2897,7 +2897,7 @@  cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
 	    attrs->ia_size != i_size_read(inode))
 		truncate_setsize(inode, attrs->ia_size);
 
-	setattr_copy(inode, attrs);
+	setattr_copy(&init_user_ns, inode, attrs);
 	mark_inode_dirty(inode);
 
 cifs_setattr_exit:
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 9b1ae410983c..2454aef02a68 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -855,7 +855,7 @@  int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
 		struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
 
 		inode_lock(d_inode(lower_dentry));
-		rc = notify_change(lower_dentry, &lower_ia, NULL);
+		rc = notify_change(&init_user_ns, lower_dentry, &lower_ia, NULL);
 		inode_unlock(d_inode(lower_dentry));
 	}
 	return rc;
@@ -933,7 +933,7 @@  static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 	}
 	mutex_unlock(&crypt_stat->cs_mutex);
 
-	rc = setattr_prepare(dentry, ia);
+	rc = setattr_prepare(&init_user_ns, dentry, ia);
 	if (rc)
 		goto out;
 	if (ia->ia_valid & ATTR_SIZE) {
@@ -959,7 +959,7 @@  static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 		lower_ia.ia_valid &= ~ATTR_MODE;
 
 	inode_lock(d_inode(lower_dentry));
-	rc = notify_change(lower_dentry, &lower_ia, NULL);
+	rc = notify_change(&init_user_ns, lower_dentry, &lower_ia, NULL);
 	inode_unlock(d_inode(lower_dentry));
 out:
 	fsstack_copy_attr_all(inode, lower_inode);
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index a92478eabfa4..ace35aa8e64b 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -305,7 +305,7 @@  int exfat_setattr(struct dentry *dentry, struct iattr *attr)
 				ATTR_TIMES_SET);
 	}
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	attr->ia_valid = ia_valid;
 	if (error)
 		goto out;
@@ -340,7 +340,7 @@  int exfat_setattr(struct dentry *dentry, struct iattr *attr)
 		up_write(&EXFAT_I(inode)->truncate_lock);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	exfat_truncate_atime(&inode->i_atime);
 	mark_inode_dirty(inode);
 
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 11c5c6fe75bb..8eccb67d04b2 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1668,7 +1668,7 @@  int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct inode *inode = d_inode(dentry);
 	int error;
 
-	error = setattr_prepare(dentry, iattr);
+	error = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (error)
 		return error;
 
@@ -1688,7 +1688,7 @@  int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
 		if (error)
 			return error;
 	}
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	if (iattr->ia_valid & ATTR_MODE)
 		error = posix_acl_chmod(inode, inode->i_mode);
 	mark_inode_dirty(inode);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b96a18679a27..554ffd367b44 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5323,7 +5323,7 @@  int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 				  ATTR_GID | ATTR_TIMES_SET))))
 		return -EPERM;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -5498,7 +5498,7 @@  int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 	}
 
 	if (!error) {
-		setattr_copy(inode, attr);
+		setattr_copy(&init_user_ns, inode, attr);
 		mark_inode_dirty(inode);
 	}
 
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 333442e96cc4..39bc0c77a895 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -863,7 +863,7 @@  int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 		!f2fs_is_compress_backend_ready(inode))
 		return -EOPNOTSUPP;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		return err;
 
diff --git a/fs/fat/file.c b/fs/fat/file.c
index f9ee27cf4d7c..805b501467e9 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -480,7 +480,7 @@  int fat_setattr(struct dentry *dentry, struct iattr *attr)
 			attr->ia_valid &= ~TIMES_SET_FLAGS;
 	}
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	attr->ia_valid = ia_valid;
 	if (error) {
 		if (sbi->options.quiet)
@@ -550,7 +550,7 @@  int fat_setattr(struct dentry *dentry, struct iattr *attr)
 		fat_truncate_time(inode, &attr->ia_mtime, S_MTIME);
 	attr->ia_valid &= ~(ATTR_ATIME|ATTR_CTIME|ATTR_MTIME);
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 out:
 	return error;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 7ce7baed3f4f..dc6e8cc565d2 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1584,7 +1584,7 @@  int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
 	if (!fc->default_permissions)
 		attr->ia_valid |= ATTR_FORCE;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		return err;
 
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 5d6ffa898030..e6f481ff6f8e 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1859,7 +1859,7 @@  int gfs2_permission(struct inode *inode, int mask)
 
 static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
 {
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
@@ -1980,7 +1980,7 @@  static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		goto error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		goto error;
 
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index f35a37c65e5f..c646218b72bf 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -608,7 +608,7 @@  int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
 	struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
 	int error;
 
-	error = setattr_prepare(dentry, attr); /* basic permission checks */
+	error = setattr_prepare(&init_user_ns, dentry, attr); /* basic permission checks */
 	if (error)
 		return error;
 
@@ -647,7 +647,7 @@  int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
 						  current_time(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 02d51cbcff04..a2789730f451 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -246,7 +246,7 @@  static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = d_inode(dentry);
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -264,7 +264,7 @@  static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 		inode->i_mtime = inode->i_ctime = current_time(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 
 	return 0;
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 36da0c31d053..a00899c8fd52 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -792,7 +792,7 @@  static int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
 
 	int fd = HOSTFS_I(inode)->fd;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		return err;
 
@@ -849,7 +849,7 @@  static int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
 	    attr->ia_size != i_size_read(inode))
 		truncate_setsize(inode, attr->ia_size);
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c
index eb8b4baf0f2e..8ba2152a78ba 100644
--- a/fs/hpfs/inode.c
+++ b/fs/hpfs/inode.c
@@ -274,7 +274,7 @@  int hpfs_setattr(struct dentry *dentry, struct iattr *attr)
 	if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
 		goto out_unlock;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		goto out_unlock;
 
@@ -288,7 +288,7 @@  int hpfs_setattr(struct dentry *dentry, struct iattr *attr)
 		hpfs_truncate(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 
 	hpfs_write_inode(inode);
 
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index fed6ddfc3f3a..53d57d852073 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -761,7 +761,7 @@  static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr)
 
 	BUG_ON(!inode);
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -780,7 +780,7 @@  static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr)
 			return error;
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/inode.c b/fs/inode.c
index d6dfa876c58d..66d3f7397d86 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1913,7 +1913,7 @@  static int __remove_privs(struct dentry *dentry, int kill)
 	 * Note we call this on write, so notify_change will not
 	 * encounter any conflicting delegations:
 	 */
-	return notify_change(dentry, &newattrs, NULL);
+	return notify_change(&init_user_ns, dentry, &newattrs, NULL);
 }
 
 /*
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 78858f6e9583..67993808f4da 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -195,7 +195,7 @@  int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct inode *inode = d_inode(dentry);
 	int rc;
 
-	rc = setattr_prepare(dentry, iattr);
+	rc = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (rc)
 		return rc;
 
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 930d2701f206..ff49876e9c9b 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -90,7 +90,7 @@  int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct inode *inode = d_inode(dentry);
 	int rc;
 
-	rc = setattr_prepare(dentry, iattr);
+	rc = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (rc)
 		return rc;
 
@@ -118,7 +118,7 @@  int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 		jfs_truncate(inode);
 	}
 
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	mark_inode_dirty(inode);
 
 	if (iattr->ia_valid & ATTR_MODE)
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index ff5598cc1de0..86bd4c593b78 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -122,7 +122,7 @@  int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr)
 		return -EINVAL;
 
 	mutex_lock(&kernfs_mutex);
-	error = setattr_prepare(dentry, iattr);
+	error = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (error)
 		goto out;
 
@@ -131,7 +131,7 @@  int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr)
 		goto out;
 
 	/* this ignores size changes */
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 
 out:
 	mutex_unlock(&kernfs_mutex);
diff --git a/fs/libfs.c b/fs/libfs.c
index 23d0a00668fd..f50446576b10 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -497,13 +497,13 @@  int simple_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct inode *inode = d_inode(dentry);
 	int error;
 
-	error = setattr_prepare(dentry, iattr);
+	error = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (error)
 		return error;
 
 	if (iattr->ia_valid & ATTR_SIZE)
 		truncate_setsize(inode, iattr->ia_size);
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/minix/file.c b/fs/minix/file.c
index c50b0a20fcd9..f07acd268577 100644
--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -27,7 +27,7 @@  static int minix_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = d_inode(dentry);
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -41,7 +41,7 @@  static int minix_setattr(struct dentry *dentry, struct iattr *attr)
 		minix_truncate(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 0d71549f9d42..aaa1dd09e243 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -90,7 +90,7 @@  nfsd_proc_setattr(struct svc_rqst *rqstp)
 		if (delta < 0)
 			delta = -delta;
 		if (delta < MAX_TOUCH_TIME_ERROR &&
-		    setattr_prepare(fhp->fh_dentry, iap) != 0) {
+		    setattr_prepare(&init_user_ns, fhp->fh_dentry, iap) != 0) {
 			/*
 			 * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
 			 * This will cause notify_change to set these times
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 3cad79c3b441..e9b1452b505e 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -448,7 +448,7 @@  nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
 			.ia_size	= iap->ia_size,
 		};
 
-		host_err = notify_change(dentry, &size_attr, NULL);
+		host_err = notify_change(&init_user_ns, dentry, &size_attr, NULL);
 		if (host_err)
 			goto out_unlock;
 		iap->ia_valid &= ~ATTR_SIZE;
@@ -463,7 +463,7 @@  nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
 	}
 
 	iap->ia_valid |= ATTR_CTIME;
-	host_err = notify_change(dentry, iap, NULL);
+	host_err = notify_change(&init_user_ns, dentry, iap, NULL);
 
 out_unlock:
 	fh_unlock(fhp);
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index d286c3bf7d43..9ac47c8d27a8 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -812,7 +812,7 @@  int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct super_block *sb = inode->i_sb;
 	int err;
 
-	err = setattr_prepare(dentry, iattr);
+	err = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (err)
 		return err;
 
@@ -827,7 +827,7 @@  int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
 		nilfs_truncate(inode);
 	}
 
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	mark_inode_dirty(inode);
 
 	if (iattr->ia_valid & ATTR_MODE) {
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index caf563981532..1f2ab03f4903 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2868,7 +2868,7 @@  int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
 	int err;
 	unsigned int ia_valid = attr->ia_valid;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		goto out;
 	/* We do not support NTFS ACLs yet. */
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index 64491af88239..d5e63ca81afe 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -196,11 +196,11 @@  static int dlmfs_file_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = d_inode(dentry);
 
 	attr->ia_valid &= ~ATTR_SIZE;
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 0c75619adf54..cabf355b148f 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1142,7 +1142,7 @@  int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
 	if (!(attr->ia_valid & OCFS2_VALID_ATTRS))
 		return 0;
 
-	status = setattr_prepare(dentry, attr);
+	status = setattr_prepare(&init_user_ns, dentry, attr);
 	if (status)
 		return status;
 
@@ -1263,7 +1263,7 @@  int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
 		}
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 
 	status = ocfs2_mark_inode_dirty(handle, inode, bh);
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index 2c7b70ee1388..729339cd7902 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -348,7 +348,7 @@  static int omfs_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = d_inode(dentry);
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -361,7 +361,7 @@  static int omfs_setattr(struct dentry *dentry, struct iattr *attr)
 		omfs_truncate(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/open.c b/fs/open.c
index b0e8430e29f3..2dc94689a7dc 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -61,7 +61,7 @@  int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
 
 	inode_lock(dentry->d_inode);
 	/* Note any delegations or leases have already been broken: */
-	ret = notify_change(dentry, &newattrs, NULL);
+	ret = notify_change(&init_user_ns, dentry, &newattrs, NULL);
 	inode_unlock(dentry->d_inode);
 	return ret;
 }
@@ -580,7 +580,7 @@  int chmod_common(const struct path *path, umode_t mode)
 		goto out_unlock;
 	newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
-	error = notify_change(path->dentry, &newattrs, &delegated_inode);
+	error = notify_change(&init_user_ns, path->dentry, &newattrs, &delegated_inode);
 out_unlock:
 	inode_unlock(inode);
 	if (delegated_inode) {
@@ -671,7 +671,7 @@  int chown_common(const struct path *path, uid_t user, gid_t group)
 	inode_lock(inode);
 	error = security_path_chown(path, uid, gid);
 	if (!error)
-		error = notify_change(path->dentry, &newattrs, &delegated_inode);
+		error = notify_change(&init_user_ns, path->dentry, &newattrs, &delegated_inode);
 	inode_unlock(inode);
 	if (delegated_inode) {
 		error = break_deleg_wait(&delegated_inode);
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index 4c790cc8042d..8ac9491ceb9a 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -855,7 +855,7 @@  int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
 		ORANGEFS_I(inode)->attr_uid = current_fsuid();
 		ORANGEFS_I(inode)->attr_gid = current_fsgid();
 	}
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	spin_unlock(&inode->i_lock);
 	mark_inode_dirty(inode);
 
@@ -876,7 +876,7 @@  int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
 	int ret;
 	gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
 	    dentry);
-	ret = setattr_prepare(dentry, iattr);
+	ret = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (ret)
 	        goto out;
 	ret = __orangefs_setattr(d_inode(dentry), iattr);
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 955ecd4030f0..b972a58f1836 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -235,7 +235,7 @@  static int ovl_set_size(struct dentry *upperdentry, struct kstat *stat)
 		.ia_size = stat->size,
 	};
 
-	return notify_change(upperdentry, &attr, NULL);
+	return notify_change(&init_user_ns, upperdentry, &attr, NULL);
 }
 
 static int ovl_set_timestamps(struct dentry *upperdentry, struct kstat *stat)
@@ -247,7 +247,7 @@  static int ovl_set_timestamps(struct dentry *upperdentry, struct kstat *stat)
 		.ia_mtime = stat->mtime,
 	};
 
-	return notify_change(upperdentry, &attr, NULL);
+	return notify_change(&init_user_ns, upperdentry, &attr, NULL);
 }
 
 int ovl_set_attr(struct dentry *upperdentry, struct kstat *stat)
@@ -259,7 +259,7 @@  int ovl_set_attr(struct dentry *upperdentry, struct kstat *stat)
 			.ia_valid = ATTR_MODE,
 			.ia_mode = stat->mode,
 		};
-		err = notify_change(upperdentry, &attr, NULL);
+		err = notify_change(&init_user_ns, upperdentry, &attr, NULL);
 	}
 	if (!err) {
 		struct iattr attr = {
@@ -267,7 +267,7 @@  int ovl_set_attr(struct dentry *upperdentry, struct kstat *stat)
 			.ia_uid = stat->uid,
 			.ia_gid = stat->gid,
 		};
-		err = notify_change(upperdentry, &attr, NULL);
+		err = notify_change(&init_user_ns, upperdentry, &attr, NULL);
 	}
 	if (!err)
 		ovl_set_timestamps(upperdentry, stat);
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 80b2fab73df7..28e4d3e4d54d 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -508,7 +508,7 @@  static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
 			.ia_mode = cattr->mode,
 		};
 		inode_lock(newdentry->d_inode);
-		err = notify_change(newdentry, &attr, NULL);
+		err = notify_change(&init_user_ns, newdentry, &attr, NULL);
 		inode_unlock(newdentry->d_inode);
 		if (err)
 			goto out_cleanup;
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index c8e3c17ca131..7d1a455e4177 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -21,7 +21,7 @@  int ovl_setattr(struct dentry *dentry, struct iattr *attr)
 	struct dentry *upperdentry;
 	const struct cred *old_cred;
 
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		return err;
 
@@ -79,7 +79,7 @@  int ovl_setattr(struct dentry *dentry, struct iattr *attr)
 
 		inode_lock(upperdentry->d_inode);
 		old_cred = ovl_override_creds(dentry->d_sb);
-		err = notify_change(upperdentry, attr, NULL);
+		err = notify_change(&init_user_ns, upperdentry, attr, NULL);
 		revert_creds(old_cred);
 		if (!err)
 			ovl_copyattr(upperdentry->d_inode, dentry->d_inode);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 82f2c35894e4..64f5f8f6f84e 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -759,7 +759,7 @@  static struct dentry *ovl_workdir_create(struct ovl_fs *ofs,
 
 		/* Clear any inherited mode bits */
 		inode_lock(work->d_inode);
-		err = notify_change(work, &attr, NULL);
+		err = notify_change(&init_user_ns, work, &attr, NULL);
 		inode_unlock(work->d_inode);
 		if (err)
 			goto out_dput;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3d21c0150e05..e60f4c60f94c 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -693,11 +693,11 @@  int proc_setattr(struct dentry *dentry, struct iattr *attr)
 	if (attr->ia_valid & ATTR_MODE)
 		return -EPERM;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 2f9fa179194d..fee877db93f2 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -121,11 +121,11 @@  static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
 	struct proc_dir_entry *de = PDE(inode);
 	int error;
 
-	error = setattr_prepare(dentry, iattr);
+	error = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (error)
 		return error;
 
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 	mark_inode_dirty(inode);
 
 	proc_set_user(de, inode->i_uid, inode->i_gid);
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 317899222d7f..ec67dbc1f705 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -821,11 +821,11 @@  static int proc_sys_setattr(struct dentry *dentry, struct iattr *attr)
 	if (attr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
 		return -EPERM;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 355523f4a4bf..f0358fe410d3 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -165,7 +165,7 @@  static int ramfs_nommu_setattr(struct dentry *dentry, struct iattr *ia)
 	int ret = 0;
 
 	/* POSIX UID/GID verification for setting inode attributes */
-	ret = setattr_prepare(dentry, ia);
+	ret = setattr_prepare(&init_user_ns, dentry, ia);
 	if (ret)
 		return ret;
 
@@ -185,7 +185,7 @@  static int ramfs_nommu_setattr(struct dentry *dentry, struct iattr *ia)
 		}
 	}
 
-	setattr_copy(inode, ia);
+	setattr_copy(&init_user_ns, inode, ia);
  out:
 	ia->ia_valid = old_ia_valid;
 	return ret;
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index c76d563dec0e..944f2b487cf8 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3288,7 +3288,7 @@  int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 	unsigned int ia_valid;
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -3413,7 +3413,7 @@  int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 	}
 
 	if (!error) {
-		setattr_copy(inode, attr);
+		setattr_copy(&init_user_ns, inode, attr);
 		mark_inode_dirty(inode);
 	}
 
diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index 45fc79a18594..ca7e216b7b9e 100644
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -34,7 +34,7 @@  static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = d_inode(dentry);
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -47,7 +47,7 @@  static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
 		sysv_truncate(inode);
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index b77d1637bbbc..25041c6d08e3 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1265,7 +1265,7 @@  int ubifs_setattr(struct dentry *dentry, struct iattr *attr)
 
 	dbg_gen("ino %lu, mode %#x, ia_valid %#x",
 		inode->i_ino, inode->i_mode, attr->ia_valid);
-	err = setattr_prepare(dentry, attr);
+	err = setattr_prepare(&init_user_ns, dentry, attr);
 	if (err)
 		return err;
 
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 928283925d68..0d5ade491b1a 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -259,7 +259,7 @@  static int udf_setattr(struct dentry *dentry, struct iattr *attr)
 	struct super_block *sb = inode->i_sb;
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -282,7 +282,7 @@  static int udf_setattr(struct dentry *dentry, struct iattr *attr)
 	if (attr->ia_valid & ATTR_MODE)
 		udf_update_extra_perms(inode, attr->ia_mode);
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index c843ec858cf7..6b51f3b20143 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -1217,7 +1217,7 @@  int ufs_setattr(struct dentry *dentry, struct iattr *attr)
 	unsigned int ia_valid = attr->ia_valid;
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -1227,7 +1227,7 @@  int ufs_setattr(struct dentry *dentry, struct iattr *attr)
 			return error;
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	mark_inode_dirty(inode);
 	return 0;
 }
diff --git a/fs/utimes.c b/fs/utimes.c
index fd3cc4226224..1a4130bee157 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -62,7 +62,7 @@  int vfs_utimes(const struct path *path, struct timespec64 *times)
 	}
 retry_deleg:
 	inode_lock(inode);
-	error = notify_change(path->dentry, &newattrs, &delegated_inode);
+	error = notify_change(&init_user_ns, path->dentry, &newattrs, &delegated_inode);
 	inode_unlock(inode);
 	if (delegated_inode) {
 		error = break_deleg_wait(&delegated_inode);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 5e165456da68..33c6c8c14275 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -639,7 +639,7 @@  xfs_vn_change_ok(
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
 
-	return setattr_prepare(dentry, iattr);
+	return setattr_prepare(&init_user_ns, dentry, iattr);
 }
 
 /*
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 5021a41e880c..f266e28ce00d 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -488,7 +488,7 @@  static int zonefs_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 	if (unlikely(IS_IMMUTABLE(inode)))
 		return -EPERM;
 
-	ret = setattr_prepare(dentry, iattr);
+	ret = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (ret)
 		return ret;
 
@@ -516,7 +516,7 @@  static int zonefs_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 			return ret;
 	}
 
-	setattr_copy(inode, iattr);
+	setattr_copy(&init_user_ns, inode, iattr);
 
 	return 0;
 }
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a5845a67a34b..95200607ac9c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2787,7 +2787,8 @@  static inline int bmap(struct inode *inode,  sector_t *block)
 }
 #endif
 
-extern int notify_change(struct dentry *, struct iattr *, struct inode **);
+extern int notify_change(struct user_namespace *, struct dentry *,
+			 struct iattr *, struct inode **);
 extern int inode_permission(struct user_namespace *, struct inode *, int);
 extern int generic_permission(struct user_namespace *, struct inode *, int);
 extern int __check_sticky(struct inode *dir, struct inode *inode);
@@ -3244,9 +3245,10 @@  extern int buffer_migrate_page_norefs(struct address_space *,
 #define buffer_migrate_page_norefs NULL
 #endif
 
-extern int setattr_prepare(struct dentry *, struct iattr *);
+extern int setattr_prepare(struct user_namespace *, struct dentry *, struct iattr *);
 extern int inode_newsize_ok(const struct inode *, loff_t offset);
-extern void setattr_copy(struct inode *inode, const struct iattr *attr);
+extern void setattr_copy(struct user_namespace *, struct inode *inode,
+			 const struct iattr *attr);
 
 extern int file_update_time(struct file *file);
 
diff --git a/mm/shmem.c b/mm/shmem.c
index 1bd6a9487222..368555ddc411 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1087,7 +1087,7 @@  static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
 	struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
 	int error;
 
-	error = setattr_prepare(dentry, attr);
+	error = setattr_prepare(&init_user_ns, dentry, attr);
 	if (error)
 		return error;
 
@@ -1141,7 +1141,7 @@  static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
 		}
 	}
 
-	setattr_copy(inode, attr);
+	setattr_copy(&init_user_ns, inode, attr);
 	if (attr->ia_valid & ATTR_MODE)
 		error = posix_acl_chmod(inode, inode->i_mode);
 	return error;