From patchwork Tue Oct 27 13:50:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 311739 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 BCD7FC55179 for ; Tue, 27 Oct 2020 18:22:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8229921D42 for ; Tue, 27 Oct 2020 18:22:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603822927; bh=q/orFT6HKF9kk09vuTE2zR8AswuXs7r+gaqvjMUXAtk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=t1o6cPxFMTh2ag6ZkMdbFiERelOxe2sgFwUf2h4icuAZ9cTn2msTgwSLlOGUacqrr 5Tb9nIVugEOAF1X7FZtbt2PSSOnvSyLvrfCHX0mk5xSPiJH8KxJzPDBZagn7vKS8n5 ruzOZ6tfIYReztrfq8NCCurAZLVdOHeWdosMo4+4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1827195AbgJ0SWF (ORCPT ); Tue, 27 Oct 2020 14:22:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:49408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753724AbgJ0OBl (ORCPT ); Tue, 27 Oct 2020 10:01:41 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 CEE36221F8; Tue, 27 Oct 2020 14:01:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807300; bh=q/orFT6HKF9kk09vuTE2zR8AswuXs7r+gaqvjMUXAtk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iOhJmJsMWNYzd2DFsoIDnZj9byLJWjsRhcVjDFdXG9ud0NYIUtnNlxo7P4qKV498U IEiNYTABhXJ5uzMrLRAVAUahuoBzyNJApwE/oBv7lKPv4oiIeXTJmOldzpItxnvoO9 hmxgVgZDGOoLJc9C4e9YkD0OWsapZY/zL2PeZ72o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+187510916eb6a14598f7@syzkaller.appspotmail.com, Eric Biggers , Jan Kara , Sasha Levin Subject: [PATCH 4.4 096/112] reiserfs: only call unlock_new_inode() if I_NEW Date: Tue, 27 Oct 2020 14:50:06 +0100 Message-Id: <20201027134905.081151837@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027134900.532249571@linuxfoundation.org> References: <20201027134900.532249571@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Eric Biggers [ Upstream commit 8859bf2b1278d064a139e3031451524a49a56bd0 ] unlock_new_inode() is only meant to be called after a new inode has already been inserted into the hash table. But reiserfs_new_inode() can call it even before it has inserted the inode, triggering the WARNING in unlock_new_inode(). Fix this by only calling unlock_new_inode() if the inode has the I_NEW flag set, indicating that it's in the table. This addresses the syzbot report "WARNING in unlock_new_inode" (https://syzkaller.appspot.com/bug?extid=187510916eb6a14598f7). Link: https://lore.kernel.org/r/20200628070057.820213-1-ebiggers@kernel.org Reported-by: syzbot+187510916eb6a14598f7@syzkaller.appspotmail.com Signed-off-by: Eric Biggers Signed-off-by: Jan Kara Signed-off-by: Sasha Levin --- fs/reiserfs/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index cfb4691d92741..ccbb15ab029f4 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -2157,7 +2157,8 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, out_inserted_sd: clear_nlink(inode); th->t_trans_id = 0; /* so the caller can't use this handle later */ - unlock_new_inode(inode); /* OK to do even if we hadn't locked it */ + if (inode->i_state & I_NEW) + unlock_new_inode(inode); iput(inode); return err; }