static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
	struct nfs_client *clp = server->nfs_client;
	struct nfs4_state *state = exception->state;
	struct inode *inode = exception->inode;
	int ret = errorcode;

	exception->retry = 0;
	switch(errorcode) {
		case 0:
			return 0;
		case -NFS4ERR_OPENMODE:
			if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
				nfs4_inode_return_delegation(inode);
				exception->retry = 1;
				return 0;
			}
			if (state == NULL)
				break;
			nfs4_schedule_stateid_recovery(server, state);
			goto wait_on_recovery;
		case -NFS4ERR_DELEG_REVOKED:
		case -NFS4ERR_ADMIN_REVOKED:
		case -NFS4ERR_BAD_STATEID:
			if (state == NULL)
				break;
			nfs_remove_bad_delegation(state->inode);
			nfs4_schedule_stateid_recovery(server, state);
			goto wait_on_recovery;
		case -NFS4ERR_EXPIRED:
			if (state != NULL)
				nfs4_schedule_stateid_recovery(server, state);
		case -NFS4ERR_STALE_STATEID:
		case -NFS4ERR_STALE_CLIENTID:
			nfs4_schedule_lease_recovery(clp);
			goto wait_on_recovery;
#if defined(CONFIG_NFS_V4_1)
		case -NFS4ERR_BADSESSION:
		case -NFS4ERR_BADSLOT:
		case -NFS4ERR_BAD_HIGH_SLOT:
		case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
		case -NFS4ERR_DEADSESSION:
		case -NFS4ERR_SEQ_FALSE_RETRY:
		case -NFS4ERR_SEQ_MISORDERED:
			dprintk("%s ERROR: %d Reset session\n", __func__,
				errorcode);
			nfs4_schedule_session_recovery(clp->cl_session, errorcode);
			goto wait_on_recovery;
#endif /* defined(CONFIG_NFS_V4_1) */
		case -NFS4ERR_FILE_OPEN:
			if (exception->timeout > HZ) {
				/* We have retried a decent amount, time to
				 * fail
				 */
				ret = -EBUSY;
				break;
			}
		case -NFS4ERR_GRACE:
		case -NFS4ERR_DELAY:
		case -EKEYEXPIRED:
			ret = nfs4_delay(server->client, &exception->timeout);
			if (ret != 0)
				break;
		case -NFS4ERR_RETRY_UNCACHED_REP:
		case -NFS4ERR_OLD_STATEID:
			exception->retry = 1;
			break;
		case -NFS4ERR_BADOWNER:
			/* The following works around a Linux server bug! */
		case -NFS4ERR_BADNAME:
			if (server->caps & NFS_CAP_UIDGID_NOMAP) {
				server->caps &= ~NFS_CAP_UIDGID_NOMAP;
				exception->retry = 1;
				printk(KERN_WARNING "NFS: v4 server %s "
						"does not accept raw "
						"uid/gids. "
						"Reenabling the idmapper.\n",
						server->nfs_client->cl_hostname);
			}
	}
	/* We failed to handle the error */
	return nfs4_map_errors(ret);
wait_on_recovery:
	ret = nfs4_wait_clnt_recover(clp);
	if (ret == 0)
		exception->retry = 1;
	return ret;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.