Commit 9e8f324b authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Check for delegation validity in nfs_start_delegation_return_locked() 



Check that the delegation is still attached after taking the spin lock
in nfs_start_delegation_return_locked().

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 8d3ca331

fs/nfs/delegation.c

+2 −1
Original line number Diff line number Diff line
@@ -307,7 +307,8 @@ nfs_start_delegation_return_locked(struct nfs_inode *nfsi) 
	if (delegation == NULL)

		goto out;

	spin_lock(&delegation->lock);

	if (!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {

	if (delegation->inode &&

	    !test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {

		clear_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags);

		/* Refcount matched in nfs_end_delegation_return() */

		ret = nfs_get_delegation(delegation);