From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C032AC47253 for ; Fri, 1 May 2020 13:40:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C9C7208DB for ; Fri, 1 May 2020 13:40:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588340424; bh=UZvpkegmnSWHNOHIpwg6phsBbyHqa0UGJDoWFKjqTSU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=RuOjj/ih2VSBRZCjTJEB6yuCezEqoVgWG5Eh/Xc6IOwa4cViYJhacj9QHc0ZOqeoB 8VD2OQJQDy+6MZZprJAMLpbaRwC6LFYLhg5UggFEYiu+7xGiXdXVYfV4/wxRl+Q4Jk 7XHOgzomY7Lj7bPvEE4OCfaMwWEyP54YKseeMQ0M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729206AbgEANkW (ORCPT ); Fri, 1 May 2020 09:40:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:40374 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731277AbgEANkV (ORCPT ); Fri, 1 May 2020 09:40:21 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 154AE24953; Fri, 1 May 2020 13:40:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588340420; bh=UZvpkegmnSWHNOHIpwg6phsBbyHqa0UGJDoWFKjqTSU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZZAbVy5XCCiY+Ss3sqLl8xF5kZxN9SquPdgUZnSbs6WRzsj+Vw6U013xdAb6xackD /xP5gvGTP8XENHUgl8H22scsNS9REmb7XRpSZY9CJNQl9kNImJ3e7WOqb5WLhPj7Xl SjNEQqAdSXvMbP2OltmB+kr/H7RTyIQIs3CrIyxs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Darrick J. Wong" , Brian Foster , Sasha Levin Subject: [PATCH 5.4 58/83] xfs: fix partially uninitialized structure in xfs_reflink_remap_extent Date: Fri, 1 May 2020 15:23:37 +0200 Message-Id: <20200501131540.021594402@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200501131524.004332640@linuxfoundation.org> References: <20200501131524.004332640@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Darrick J. Wong [ Upstream commit c142932c29e533ee892f87b44d8abc5719edceec ] In the reflink extent remap function, it turns out that uirec (the block mapping corresponding only to the part of the passed-in mapping that got unmapped) was not fully initialized. Specifically, br_state was not being copied from the passed-in struct to the uirec. This could lead to unpredictable results such as the reflinked mapping being marked unwritten in the destination file. Signed-off-by: Darrick J. Wong Reviewed-by: Brian Foster Signed-off-by: Sasha Levin --- fs/xfs/xfs_reflink.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 0f08153b49941..6a4fd1738b086 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1053,6 +1053,7 @@ xfs_reflink_remap_extent( uirec.br_startblock = irec->br_startblock + rlen; uirec.br_startoff = irec->br_startoff + rlen; uirec.br_blockcount = unmap_len - rlen; + uirec.br_state = irec->br_state; unmap_len = rlen; /* If this isn't a real mapping, we're done. */ -- 2.20.1