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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 2C3DEC3A5A9 for ; Sat, 18 Apr 2020 14:46:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 083B62072B for ; Sat, 18 Apr 2020 14:46:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587221195; bh=OrQDEZwaBLAejk69UTzq40l8Q0RYaVFDj1NkNn8/XbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mQRVEVy2b2xzth9nWIWoGPoutSZjaTETAR+gjf+xDwx7v0y0PqV99wfCxAIhkYj6V 3D6tR6CwNoG1vbE7OXU1F9MR0+nyjjx+YIVE1TpASD8sQUA1l3SDiccJ1RF+X5NAp5 Sk0jvJtHEezPwToFUiTYGRRfZ9i1K1wzSl97heDM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728823AbgDROob (ORCPT ); Sat, 18 Apr 2020 10:44:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:56232 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728817AbgDROoa (ORCPT ); Sat, 18 Apr 2020 10:44:30 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1E8F121D79; Sat, 18 Apr 2020 14:44:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587221069; bh=OrQDEZwaBLAejk69UTzq40l8Q0RYaVFDj1NkNn8/XbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Yj2Oo5vdo0MfhFxW4lMc78xcoGgRCmt8MMj+cpE1EakzT4EmK+2RM+JpfyCYZB3b7 FyWuOQMrAZoI9LYm9FXSvfwTzNH3OjzDN/ypZbVhjTkrvhr3VBeDxeYxTIPEmqquZQ GRDDJAGIcbT91hr6kte1NNMrqEJ72YnDI7M9prfY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Changwei Ge , Andrew Morton , Joseph Qi , Mark Fasheh , Joel Becker , Junxiao Bi , Changwei Ge , Gang He , Jun Piao , Linus Torvalds , Sasha Levin , ocfs2-devel@oss.oracle.com Subject: [PATCH AUTOSEL 4.9 18/23] ocfs2: no need try to truncate file beyond i_size Date: Sat, 18 Apr 2020 10:44:00 -0400 Message-Id: <20200418144405.10565-18-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200418144405.10565-1-sashal@kernel.org> References: <20200418144405.10565-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Changwei Ge [ Upstream commit 783fda856e1034dee90a873f7654c418212d12d7 ] Linux fallocate(2) with FALLOC_FL_PUNCH_HOLE mode set, its offset can exceed the inode size. Ocfs2 now doesn't allow that offset beyond inode size. This restriction is not necessary and violates fallocate(2) semantics. If fallocate(2) offset is beyond inode size, just return success and do nothing further. Otherwise, ocfs2 will crash the kernel. kernel BUG at fs/ocfs2//alloc.c:7264! ocfs2_truncate_inline+0x20f/0x360 [ocfs2] ocfs2_remove_inode_range+0x23c/0xcb0 [ocfs2] __ocfs2_change_file_space+0x4a5/0x650 [ocfs2] ocfs2_fallocate+0x83/0xa0 [ocfs2] vfs_fallocate+0x148/0x230 SyS_fallocate+0x48/0x80 do_syscall_64+0x79/0x170 Signed-off-by: Changwei Ge Signed-off-by: Andrew Morton Reviewed-by: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Gang He Cc: Jun Piao Cc: Link: http://lkml.kernel.org/r/20200407082754.17565-1-chge@linux.alibaba.com Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- fs/ocfs2/alloc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index 06089becca607..dfb8a923921e0 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -7246,6 +7246,10 @@ int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh, struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; struct ocfs2_inline_data *idata = &di->id2.i_data; + /* No need to punch hole beyond i_size. */ + if (start >= i_size_read(inode)) + return 0; + if (end > i_size_read(inode)) end = i_size_read(inode); -- 2.20.1