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=-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=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 74FA0C6379D for ; Tue, 27 Oct 2020 14:11:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C11E22202 for ; Tue, 27 Oct 2020 14:11:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807864; bh=KDEjwspJyIH0+HO6uIy5jM5u5QAk6OY+cIrgJ+2DZJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GZx1CIdXDxMj5cJ46Suy59Aj7L3J6kLGVLN1r8ev/CQeCJDvsfJbfNhWVRPnUK+36 +WhbKYxIL71F6Yxh/pyS+dL4Eufffvd4N/bIthlsyD6zOgiq9K91f8NOoJoYz3k+hn mr6y2PaHiYrmh5b4stUqnMj+SeSZE1V3MVO1wnw4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754898AbgJ0OHf (ORCPT ); Tue, 27 Oct 2020 10:07:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:55754 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754795AbgJ0OHH (ORCPT ); Tue, 27 Oct 2020 10:07:07 -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 B24F422258; Tue, 27 Oct 2020 14:07:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807626; bh=KDEjwspJyIH0+HO6uIy5jM5u5QAk6OY+cIrgJ+2DZJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UPpvmWZFhu43YNbbykguJth0aAojtGcf/9YMjHzuRNqi/XtwiP1t66IW0fhSlIj0t 3XW1sUtqqSEv2E1GlnsZq9AGphYvpBOoMc8Gmgd0d81pGWz0ZKwHHFaGzOXEB1CkeP PAKvajXmWZUC0gY304No5SETj8t7LYCz2nBMN0+A= 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 4.9 121/139] reiserfs: only call unlock_new_inode() if I_NEW Date: Tue, 27 Oct 2020 14:50:15 +0100 Message-Id: <20201027134907.890094564@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027134902.130312227@linuxfoundation.org> References: <20201027134902.130312227@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 897154e993800..f28999f717761 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -2166,7 +2166,8 @@ 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; } -- 2.25.1