tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / xfs / xfs_export.c

diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 4267922..8c6d1d7 100644 (file)
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -189,6 +189,9 @@ xfs_fs_fh_to_parent(struct super_block *sb, struct fid *fid,
        struct xfs_fid64        *fid64 = (struct xfs_fid64 *)fid;
        struct inode            *inode = NULL;
 
+       if (fh_len < xfs_fileid_length(fileid_type))
+               return NULL;
+
        switch (fileid_type) {
        case FILEID_INO32_GEN_PARENT:
                inode = xfs_nfs_get_inode(sb, fid->i32.parent_ino,