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=-6.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 86E75C47098 for ; Thu, 3 Jun 2021 04:43:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 69E67613E6 for ; Thu, 3 Jun 2021 04:43:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229772AbhFCEp2 (ORCPT ); Thu, 3 Jun 2021 00:45:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:45776 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229487AbhFCEp1 (ORCPT ); Thu, 3 Jun 2021 00:45:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 46328613BA; Thu, 3 Jun 2021 04:43:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622695412; bh=iBrVSaDhqE8uFABGWrDJeYHOE6iBHbWDWzWxi6Jrflw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=AH/gyS9TTOx0VAHLFgYBRFlVkVj9G0e4MGs9R7KiDwKloke9F60xk+iPrefkYaJvj bvzyPRk1PLbutzhmbJrjXlzyzVPrUaL9ghP8qmyNcUZ8M8wH9qHSbpIfgkoj7eMhOe PoiQACmtOFsKbBDXuKpuqrzPsbNkFoFBOdF4NfYA= Date: Thu, 3 Jun 2021 06:43:28 +0200 From: Greg KH To: Kurt Manucredo Cc: syzbot+bed360704c521841c85d@syzkaller.appspotmail.com, andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, hawk@kernel.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com, nathan@kernel.org, ndesaulniers@google.com, clang-built-linux@googlegroups.com, linux-kernel-mentees@lists.linuxfoundation.org, skhan@linuxfoundation.org Subject: Re: [PATCH v3] bpf: core: fix shift-out-of-bounds in ___bpf_prog_run Message-ID: References: <000000000000c2987605be907e41@google.com> <20210602212726.7-1-fuzzybritches0@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210602212726.7-1-fuzzybritches0@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 02, 2021 at 09:27:26PM +0000, Kurt Manucredo wrote: > UBSAN: shift-out-of-bounds in kernel/bpf/core.c:1414:2 > shift exponent 248 is too large for 32-bit type 'unsigned int' I'm sorry, but I still do not understand what this changelog text means. Please be very descriptive about what you are doing and why you are doing it. All that is here is a message from a random tool :( thanks, greg k-h