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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C163EE3F39 for ; Tue, 12 Sep 2023 23:41:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237421AbjILXlb (ORCPT ); Tue, 12 Sep 2023 19:41:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232228AbjILXlb (ORCPT ); Tue, 12 Sep 2023 19:41:31 -0400 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C638A10C7 for ; Tue, 12 Sep 2023 16:41:26 -0700 (PDT) Received: from cwcc.thunk.org (pool-173-48-113-225.bstnma.fios.verizon.net [173.48.113.225]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 38CNfCmC019110 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Sep 2023 19:41:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mit.edu; s=outgoing; t=1694562075; bh=FyTtfg4qgEc24SYu4LBW17g30jtSmbALAwXWhNHhlTQ=; h=Date:From:Subject:Message-ID:MIME-Version:Content-Type; b=fqAzxLw+TSu4JBThOyINgyEJDDrYUdG3Cg5xfO7akcn7xAvMdGZ3mczRuC0my8Ozl 2vXhzaakJ4/XLvq8yRExN+B3WrXrGcUuAzWdVkFHblEXaYKdvsDvfO3qlil24xYKu0 kUejmdj0lI5VGhmyON34EfHyhs28RZ4cXwNxkTzyoDsfUd22Btcp4M0iPUkm0+dTsd 6HYv+a4ltro4SnwxCIR2WTqtJbYEX/FgqUD5wxBpgc2xHR8jDf3gNL7fk1ZuxlV2b7 Ck+kLIsVgBYqc5xgQZcB8ytgusmqkVBtM64Tm0kXhxAsGcakMeaWZVhN3OXCRPOB6Z OqVUMpoyF0jgQ== Received: by cwcc.thunk.org (Postfix, from userid 15806) id A008C15C0266; Tue, 12 Sep 2023 19:41:12 -0400 (EDT) Date: Tue, 12 Sep 2023 19:41:12 -0400 From: "Theodore Ts'o" To: Sanan Hasanov Cc: "adilger.kernel@dilger.ca" , "linux-ext4@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "syzkaller@googlegroups.com" , "contact@pgazz.com" Subject: Re: general protection fault in ext4_update_overhead Message-ID: <20230912234112.GA1294595@mit.edu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Tue, Sep 12, 2023 at 11:02:35PM +0000, Sanan Hasanov wrote: > Good day, dear maintainers, > > We found a bug using a modified kernel configuration file used by syzbot. > > We enhanced the coverage of the configuration file using our tool, klocalizer. > > Kernel Branch: 6.3.0-next-20230426 > Kernel Config: https://drive.google.com/file/d/1xpe7qMUUYvHQFzqZGUzcco9jF97EwTqQ/view?usp=sharing > Reproducer: https://drive.google.com/file/d/1Q8ix6EiWrzx0bWLyoGTHP721KE4Ei3qf/view?usp=sharing The reproducer is a zero-length file. So I can do nothing with this report. Note that the official syzbot instance will do automatic bisection, and will allow us to test patches. The official syzbot instance also processes the console output so that the stack trace has line numbers and clickable links to the kernel sources. This report is **much** less useful than the syzbot report, so please don't be surprised if people treat this at a significantly lower priority. (Even if the reproducer wasn't a zero length file. :-P ) - Ted