From patchwork Tue Oct 16 16:30:36 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weston Andros Adamson X-Patchwork-Id: 1601701 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id C8F9EDFFED for ; Tue, 16 Oct 2012 16:31:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755098Ab2JPQb3 (ORCPT ); Tue, 16 Oct 2012 12:31:29 -0400 Received: from mx2.netapp.com ([216.240.18.37]:15980 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754796Ab2JPQb2 (ORCPT ); Tue, 16 Oct 2012 12:31:28 -0400 X-IronPort-AV: E=Sophos;i="4.80,595,1344236400"; d="scan'208";a="701308018" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 16 Oct 2012 09:31:14 -0700 Received: from francist-pc.hq.netapp.com (francist-pc.hq.netapp.com [10.55.76.177] (may be forged)) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id q9GGUnZX016423; Tue, 16 Oct 2012 09:31:14 -0700 (PDT) From: Weston Andros Adamson To: Trond.Myklebust@netapp.com Cc: linux-nfs@vger.kernel.org, Weston Andros Adamson Subject: [PATCH 18/25] SUNRPC: remove BUG_ON() in xdr_shrink_bufhead() Date: Tue, 16 Oct 2012 12:30:36 -0400 Message-Id: <1350405043-39316-18-git-send-email-dros@netapp.com> X-Mailer: git-send-email 1.7.9.6 (Apple Git-31.1) In-Reply-To: <1350405043-39316-1-git-send-email-dros@netapp.com> References: <1350405043-39316-1-git-send-email-dros@netapp.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Replace bounds checking BUG_ON() with a WARN_ON_ONCE() and resetting the requested len to the max. Signed-off-by: Weston Andros Adamson --- net/sunrpc/xdr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 08f50af..5605563 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -318,7 +318,10 @@ xdr_shrink_bufhead(struct xdr_buf *buf, size_t len) tail = buf->tail; head = buf->head; - BUG_ON (len > head->iov_len); + + WARN_ON_ONCE(len > head->iov_len); + if (len > head->iov_len) + len = head->iov_len; /* Shift the tail first */ if (tail->iov_len != 0) {