3 files changed, 17 insertions, 4 deletions

diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 5275097a7565..b5348405046b 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -229,7 +229,7 @@ nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
                 goto out;
         status = vfs_readdir(filp, nfsd4_build_namelist, &names);
         fput(filp);
-        mutex_lock(&dir->d_inode->i_mutex);
+        mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
         while (!list_empty(&names)) {
                 entry = list_entry(names.next, struct name_list, list);
 
@@ -264,7 +264,7 @@ nfsd4_unlink_clid_dir(char *name, int namlen)
 
         dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
 
-        mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
+        mutex_lock_nested(&rec_dir.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
         dentry = lookup_one_len(name, rec_dir.dentry, namlen);
         if (IS_ERR(dentry)) {
                 status = PTR_ERR(dentry);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index c65a27b76a9d..3b711f5147a7 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -580,7 +580,6 @@ free_session(struct kref *kref)
                 struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry;
                 nfsd4_release_respages(e->ce_respages, e->ce_resused);
         }
-        kfree(ses->se_slots);
         kfree(ses);
 }
 
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index b820c311931c..b73549d293be 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2214,6 +2214,15 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
         dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
         if (IS_ERR(dentry))
                 return nfserrno(PTR_ERR(dentry));
+        if (!dentry->d_inode) {
+                /*
+                 * nfsd_buffered_readdir drops the i_mutex between
+                 * readdir and calling this callback, leaving a window
+                 * where this directory entry could have gone away.
+                 */
+                dput(dentry);
+                return nfserr_noent;
+        }
 
         exp_get(exp);
         /*
@@ -2276,6 +2285,7 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
         struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
         int buflen;
         __be32 *p = cd->buffer;
+        __be32 *cookiep;
         __be32 nfserr = nfserr_toosmall;
 
         /* In nfsv4, "." and ".." never make it onto the wire.. */
@@ -2292,7 +2302,7 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
                 goto fail;
 
         *p++ = xdr_one;                             /* mark entry present */
-        cd->offset = p;                             /* remember pointer */
+        cookiep = p;
         p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
         p = xdr_encode_array(p, name, namlen);      /* name length & name */
 
@@ -2306,6 +2316,8 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
                 goto fail;
         case nfserr_dropit:
                 goto fail;
+        case nfserr_noent:
+                goto skip_entry;
         default:
                 /*
                  * If the client requested the RDATTR_ERROR attribute,
@@ -2324,6 +2336,8 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
         }
         cd->buflen -= (p - cd->buffer);
         cd->buffer = p;
+        cd->offset = cookiep;
+skip_entry:
         cd->common.err = nfs_ok;
         return 0;
 fail: