From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932672Ab3BSKey (ORCPT ); Tue, 19 Feb 2013 05:34:54 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60635 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932515Ab3BSKeO (ORCPT ); Tue, 19 Feb 2013 05:34:14 -0500 From: Steven Whitehouse To: linux-kernel@vger.kernel.org, cluster-devel@redhat.com Cc: Bob Peterson , Steven Whitehouse Subject: [PATCH 09/10] GFS2: Get a block reservation before resizing a file Date: Tue, 19 Feb 2013 10:07:39 +0000 Message-Id: <1361268460-3092-10-git-send-email-swhiteho@redhat.com> In-Reply-To: <1361268460-3092-1-git-send-email-swhiteho@redhat.com> References: <1361268460-3092-1-git-send-email-swhiteho@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bob Peterson This patch allocates a block reservation structure before growing or shrinking a file. Without this structure, the grow or shink code can reference the bad pointer. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index d29d779..df686d1 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1288,6 +1288,10 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize) inode_dio_wait(inode); + ret = gfs2_rs_alloc(GFS2_I(inode)); + if (ret) + return ret; + oldsize = inode->i_size; if (newsize >= oldsize) return do_grow(inode, newsize); -- 1.7.4