[v4,17/40] stat: handle idmapped mounts

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 1b2028be2e08..ca3ac5a8daa8 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1006,7 +1006,7 @@  v9fs_vfs_getattr(const struct path *path, struct kstat *stat,
 	p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
 	v9ses = v9fs_dentry2v9ses(dentry);
 	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
-		generic_fillattr(d_inode(dentry), stat);
+		generic_fillattr(&init_user_ns, d_inode(dentry), stat);
 		return 0;
 	}
 	fid = v9fs_fid_lookup(dentry);
@@ -1018,7 +1018,7 @@  v9fs_vfs_getattr(const struct path *path, struct kstat *stat,
 		return PTR_ERR(st);
 
 	v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0);
-	generic_fillattr(d_inode(dentry), stat);
+	generic_fillattr(&init_user_ns, d_inode(dentry), stat);
 
 	p9stat_free(st);
 	kfree(st);
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 282ec5cb45dc..8f3c1daf72ba 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -466,7 +466,7 @@  v9fs_vfs_getattr_dotl(const struct path *path, struct kstat *stat,
 	p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
 	v9ses = v9fs_dentry2v9ses(dentry);
 	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
-		generic_fillattr(d_inode(dentry), stat);
+		generic_fillattr(&init_user_ns, d_inode(dentry), stat);
 		return 0;
 	}
 	fid = v9fs_fid_lookup(dentry);
@@ -482,7 +482,7 @@  v9fs_vfs_getattr_dotl(const struct path *path, struct kstat *stat,
 		return PTR_ERR(st);
 
 	v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
-	generic_fillattr(d_inode(dentry), stat);
+	generic_fillattr(&init_user_ns, d_inode(dentry), stat);
 	/* Change block size to what the server returned */
 	stat->blksize = st->st_blksize;
 
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index b0d7b892090d..795ee5cb3817 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -745,7 +745,7 @@  int afs_getattr(const struct path *path, struct kstat *stat,
 
 	do {
 		read_seqbegin_or_lock(&vnode->cb_lock, &seq);
-		generic_fillattr(inode, stat);
+		generic_fillattr(&init_user_ns, inode, stat);
 		if (test_bit(AFS_VNODE_SILLY_DELETED, &vnode->flags) &&
 		    stat->nlink > 0)
 			stat->nlink -= 1;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 502b7db93894..694644bbd2d9 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8841,7 +8841,7 @@  static int btrfs_getattr(const struct path *path, struct kstat *stat,
 				  STATX_ATTR_IMMUTABLE |
 				  STATX_ATTR_NODUMP);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->dev = BTRFS_I(inode)->root->anon_dev;
 
 	spin_lock(&BTRFS_I(inode)->lock);
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 19ec845ba5ec..decfa5e1ec4c 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2380,7 +2380,7 @@  int ceph_getattr(const struct path *path, struct kstat *stat,
 			return err;
 	}
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->ino = ceph_present_inode(inode);
 
 	/*
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 4d69b786e403..4fb3b6961096 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -2400,7 +2400,7 @@  int cifs_getattr(const struct path *path, struct kstat *stat,
 			return rc;
 	}
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->blksize = cifs_sb->bsize;
 	stat->ino = CIFS_I(inode)->uniqueid;
 
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index b1c70e2b9b1e..4d113e191cb8 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -256,7 +256,7 @@  int coda_getattr(const struct path *path, struct kstat *stat,
 {
 	int err = coda_revalidate_inode(d_inode(path->dentry));
 	if (!err)
-		generic_fillattr(d_inode(path->dentry), stat);
+		generic_fillattr(&init_user_ns, d_inode(path->dentry), stat);
 	return err;
 }
 
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 7de9fda25dad..0a218d7c3023 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -975,7 +975,7 @@  static int ecryptfs_getattr_link(const struct path *path, struct kstat *stat,
 
 	mount_crypt_stat = &ecryptfs_superblock_to_private(
 						dentry->d_sb)->mount_crypt_stat;
-	generic_fillattr(d_inode(dentry), stat);
+	generic_fillattr(&init_user_ns, d_inode(dentry), stat);
 	if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) {
 		char *target;
 		size_t targetsiz;
@@ -1003,7 +1003,7 @@  static int ecryptfs_getattr(const struct path *path, struct kstat *stat,
 	if (!rc) {
 		fsstack_copy_attr_all(d_inode(dentry),
 				      ecryptfs_inode_to_lower(d_inode(dentry)));
-		generic_fillattr(d_inode(dentry), stat);
+		generic_fillattr(&init_user_ns, d_inode(dentry), stat);
 		stat->blocks = lower_stat.blocks;
 	}
 	return rc;
diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index 3e21c0e8adae..083818063ac6 100644
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -343,7 +343,7 @@  int erofs_getattr(const struct path *path, struct kstat *stat,
 	stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
 				  STATX_ATTR_IMMUTABLE);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index ace35aa8e64b..e9705b3295d3 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -273,7 +273,7 @@  int exfat_getattr(const struct path *path, struct kstat *stat,
 	struct inode *inode = d_backing_inode(path->dentry);
 	struct exfat_inode_info *ei = EXFAT_I(inode);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	exfat_truncate_atime(&stat->atime);
 	stat->result_mask |= STATX_BTIME;
 	stat->btime.tv_sec = ei->i_crtime.tv_sec;
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 5ff1e5e3c0fe..7fcda76094ff 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1659,7 +1659,7 @@  int ext2_getattr(const struct path *path, struct kstat *stat,
 			STATX_ATTR_IMMUTABLE |
 			STATX_ATTR_NODUMP);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f0487795afd1..d992fef2e7c2 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5558,7 +5558,7 @@  int ext4_getattr(const struct path *path, struct kstat *stat,
 				  STATX_ATTR_NODUMP |
 				  STATX_ATTR_VERITY);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index e4a13570deff..712e1eaff4d5 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -814,7 +814,7 @@  int f2fs_getattr(const struct path *path, struct kstat *stat,
 				  STATX_ATTR_NODUMP |
 				  STATX_ATTR_VERITY);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 
 	/* we need to show initial sectors used for inline_data/dentries */
 	if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 805b501467e9..f7e04f533d31 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -398,7 +398,7 @@  int fat_getattr(const struct path *path, struct kstat *stat,
 		u32 request_mask, unsigned int flags)
 {
 	struct inode *inode = d_inode(path->dentry);
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->blksize = MSDOS_SB(inode->i_sb)->cluster_size;
 
 	if (MSDOS_SB(inode->i_sb)->options.nfs == FAT_NFS_NOSTALE_RO) {
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index dc6e8cc565d2..0750755685cd 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1064,7 +1064,7 @@  static int fuse_update_get_attr(struct inode *inode, struct file *file,
 		forget_all_cached_acls(inode);
 		err = fuse_do_getattr(inode, stat, file);
 	} else if (stat) {
-		generic_fillattr(inode, stat);
+		generic_fillattr(&init_user_ns, inode, stat);
 		stat->mode = fi->orig_i_mode;
 		stat->ino = fi->orig_ino;
 	}
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index a29b66116c01..f1841667bcd9 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -2048,7 +2048,7 @@  static int gfs2_getattr(const struct path *path, struct kstat *stat,
 				  STATX_ATTR_IMMUTABLE |
 				  STATX_ATTR_NODUMP);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 
 	if (gfs2_holder_initialized(&gh))
 		gfs2_glock_dq_uninit(&gh);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index ffa137f8234e..642e067d8fe8 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -286,7 +286,7 @@  int hfsplus_getattr(const struct path *path, struct kstat *stat,
 	stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
 				 STATX_ATTR_NODUMP;
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 7e44052b42e1..032d3d7546d8 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -193,7 +193,7 @@  int kernfs_iop_getattr(const struct path *path, struct kstat *stat,
 	kernfs_refresh_inode(kn, inode);
 	mutex_unlock(&kernfs_mutex);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/libfs.c b/fs/libfs.c
index a0ca5c9f946d..ea9d53d68ca5 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -31,7 +31,7 @@  int simple_getattr(const struct path *path, struct kstat *stat,
 		   u32 request_mask, unsigned int query_flags)
 {
 	struct inode *inode = d_inode(path->dentry);
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->blocks = inode->i_mapping->nrpages << (PAGE_SHIFT - 9);
 	return 0;
 }
@@ -1304,7 +1304,7 @@  static int empty_dir_getattr(const struct path *path, struct kstat *stat,
 			     u32 request_mask, unsigned int query_flags)
 {
 	struct inode *inode = d_inode(path->dentry);
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 34f546404aa1..91c81d2fc90d 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -658,7 +658,7 @@  int minix_getattr(const struct path *path, struct kstat *stat,
 	struct super_block *sb = path->dentry->d_sb;
 	struct inode *inode = d_inode(path->dentry);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	if (INODE_VERSION(inode) == MINIX_V1)
 		stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb);
 	else
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index aa6493905bbe..8d74974d7992 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -858,7 +858,7 @@  int nfs_getattr(const struct path *path, struct kstat *stat,
 	/* Only return attributes that were revalidated. */
 	stat->result_mask &= request_mask;
 out_no_update:
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
 	if (S_ISDIR(inode->i_mode))
 		stat->blksize = NFS_SERVER(inode)->dtsize;
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 2bcbe38afe2e..55fc711e368b 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -213,7 +213,7 @@  nfs_namespace_getattr(const struct path *path, struct kstat *stat,
 {
 	if (NFS_FH(d_inode(path->dentry))->size != 0)
 		return nfs_getattr(path, stat, request_mask, query_flags);
-	generic_fillattr(d_inode(path->dentry), stat);
+	generic_fillattr(&init_user_ns, d_inode(path->dentry), stat);
 	return 0;
 }
 
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index cabf355b148f..a070d4c9b6ed 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1313,7 +1313,7 @@  int ocfs2_getattr(const struct path *path, struct kstat *stat,
 		goto bail;
 	}
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	/*
 	 * If there is inline data in the inode, the inode will normally not
 	 * have data blocks allocated (it may have an external xattr block).
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index 563fe9ab8eb2..b94032f77e61 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -903,7 +903,7 @@  int orangefs_getattr(const struct path *path, struct kstat *stat,
 	ret = orangefs_inode_getattr(inode,
 	    request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
 	if (ret == 0) {
-		generic_fillattr(inode, stat);
+		generic_fillattr(&init_user_ns, inode, stat);
 
 		/* override block size reported to stat */
 		if (!(request_mask & STATX_SIZE))
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 266b54b75c4c..bf4b203103a7 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1934,7 +1934,7 @@  int pid_getattr(const struct path *path, struct kstat *stat,
 	struct proc_fs_info *fs_info = proc_sb_info(inode->i_sb);
 	struct task_struct *task;
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 
 	stat->uid = GLOBAL_ROOT_UID;
 	stat->gid = GLOBAL_ROOT_GID;
@@ -3797,7 +3797,7 @@  static int proc_task_getattr(const struct path *path, struct kstat *stat,
 {
 	struct inode *inode = d_inode(path->dentry);
 	struct task_struct *p = get_proc_task(inode);
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 
 	if (p) {
 		stat->nlink += get_nr_threads(p);
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 896f2ebde75c..5c6345c68fc5 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -145,7 +145,7 @@  static int proc_getattr(const struct path *path, struct kstat *stat,
 		}
 	}
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	return 0;
 }
 
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index ed8a6306990c..bc555b7da6dc 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -313,7 +313,7 @@  static int proc_tgid_net_getattr(const struct path *path, struct kstat *stat,
 
 	net = get_proc_task_net(inode);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 
 	if (net != NULL) {
 		stat->nlink = net->proc_net->nlink;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index ec67dbc1f705..87c828348140 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -840,7 +840,7 @@  static int proc_sys_getattr(const struct path *path, struct kstat *stat,
 	if (IS_ERR(head))
 		return PTR_ERR(head);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	if (table)
 		stat->mode = (stat->mode & S_IFMT) | table->mode;
 
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 5e444d4f9717..244e4b6f15ef 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -311,7 +311,7 @@  void __init proc_root_init(void)
 static int proc_root_getattr(const struct path *path, struct kstat *stat,
 			     u32 request_mask, unsigned int query_flags)
 {
-	generic_fillattr(d_inode(path->dentry), stat);
+	generic_fillattr(&init_user_ns, d_inode(path->dentry), stat);
 	stat->nlink = proc_root.nlink + nr_processes();
 	return 0;
 }
diff --git a/fs/stat.c b/fs/stat.c
index dacecdda2e79..8c58c37ef1ab 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -26,21 +26,29 @@ 
 
 /**
  * generic_fillattr - Fill in the basic attributes from the inode struct
- * @inode: Inode to use as the source
- * @stat: Where to fill in the attributes
+ * @mnt_userns:	user namespace of the mount the inode was found from
+ * @inode:	Inode to use as the source
+ * @stat:	Where to fill in the attributes
  *
  * Fill in the basic attributes in the kstat structure from data that's to be
  * found on the VFS inode structure.  This is the default if no getattr inode
  * operation is supplied.
+ *
+ * If the inode has been found through an idmapped mount the user namespace of
+ * the vfsmount must be passed through @mnt_userns. This function will then take
+ * care to map the inode according to @mnt_userns before filling in the uid and
+ * gid filds. On non-idmapped mounts or if permission checking is to be
+ * performed on the raw inode simply passs init_user_ns.
  */
-void generic_fillattr(struct inode *inode, struct kstat *stat)
+void generic_fillattr(struct user_namespace *mnt_userns, struct inode *inode,
+		      struct kstat *stat)
 {
 	stat->dev = inode->i_sb->s_dev;
 	stat->ino = inode->i_ino;
 	stat->mode = inode->i_mode;
 	stat->nlink = inode->i_nlink;
-	stat->uid = inode->i_uid;
-	stat->gid = inode->i_gid;
+	stat->uid = i_uid_into_mnt(mnt_userns, inode);
+	stat->gid = i_gid_into_mnt(mnt_userns, inode);
 	stat->rdev = inode->i_rdev;
 	stat->size = i_size_read(inode);
 	stat->atime = inode->i_atime;
@@ -87,7 +95,7 @@  int vfs_getattr_nosec(const struct path *path, struct kstat *stat,
 		return inode->i_op->getattr(path, stat, request_mask,
 					    query_flags);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(mnt_user_ns(path->mnt), inode, stat);
 	return 0;
 }
 EXPORT_SYMBOL(vfs_getattr_nosec);
diff --git a/fs/sysv/itree.c b/fs/sysv/itree.c
index bcb67b0cabe7..83cffab6955f 100644
--- a/fs/sysv/itree.c
+++ b/fs/sysv/itree.c
@@ -445,7 +445,7 @@  int sysv_getattr(const struct path *path, struct kstat *stat,
 		 u32 request_mask, unsigned int flags)
 {
 	struct super_block *s = path->dentry->d_sb;
-	generic_fillattr(d_inode(path->dentry), stat);
+	generic_fillattr(&init_user_ns, d_inode(path->dentry), stat);
 	stat->blocks = (s->s_blocksize / 512) * sysv_nblocks(s, stat->size);
 	stat->blksize = s->s_blocksize;
 	return 0;
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index a2bbd7ed39e9..e61d6fa7ed18 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1579,7 +1579,7 @@  int ubifs_getattr(const struct path *path, struct kstat *stat,
 				STATX_ATTR_ENCRYPTED |
 				STATX_ATTR_IMMUTABLE);
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	stat->blksize = UBIFS_BLOCK_SIZE;
 	stat->size = ui->ui_size;
 
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index c973db239604..54a44d1f023c 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -159,7 +159,7 @@  static int udf_symlink_getattr(const struct path *path, struct kstat *stat,
 	struct inode *inode = d_backing_inode(dentry);
 	struct page *page;
 
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 	page = read_mapping_page(inode->i_mapping, 0, NULL);
 	if (IS_ERR(page))
 		return PTR_ERR(page);
diff --git a/fs/vboxsf/utils.c b/fs/vboxsf/utils.c
index 018057546067..d2cd1c99f48e 100644
--- a/fs/vboxsf/utils.c
+++ b/fs/vboxsf/utils.c
@@ -233,7 +233,7 @@  int vboxsf_getattr(const struct path *path, struct kstat *kstat,
 	if (err)
 		return err;
 
-	generic_fillattr(d_inode(dentry), kstat);
+	generic_fillattr(&init_user_ns, d_inode(dentry), kstat);
 	return 0;
 }
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index fb634ea3ce05..e4d5a7c82136 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3143,7 +3143,7 @@  extern int __page_symlink(struct inode *inode, const char *symname, int len,
 extern int page_symlink(struct inode *inode, const char *symname, int len);
 extern const struct inode_operations page_symlink_inode_operations;
 extern void kfree_link(void *);
-extern void generic_fillattr(struct inode *, struct kstat *);
+extern void generic_fillattr(struct user_namespace *, struct inode *, struct kstat *);
 extern int vfs_getattr_nosec(const struct path *, struct kstat *, u32, unsigned int);
 extern int vfs_getattr(const struct path *, struct kstat *, u32, unsigned int);
 void __inode_add_bytes(struct inode *inode, loff_t bytes);
diff --git a/mm/shmem.c b/mm/shmem.c
index da36ac107128..fe43360c5888 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1072,7 +1072,7 @@  static int shmem_getattr(const struct path *path, struct kstat *stat,
 		shmem_recalc_inode(inode);
 		spin_unlock_irq(&info->lock);
 	}
-	generic_fillattr(inode, stat);
+	generic_fillattr(&init_user_ns, inode, stat);
 
 	if (is_huge_enabled(sb_info))
 		stat->blksize = HPAGE_PMD_SIZE;