Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp1114952pxj; Wed, 2 Jun 2021 21:45:04 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyjc+74IIdjX15HO1gaoJK+L3LfCh3IEHQ3/2kXxVqWNDDHP1mBnlSTg5EgLhcY/itkZHuy X-Received: by 2002:a17:907:3e25:: with SMTP id hp37mr10874201ejc.201.1622695504165; Wed, 02 Jun 2021 21:45:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1622695504; cv=none; d=google.com; s=arc-20160816; b=lIDY7R7nI7XtNtZWUF1//bLH7trVnDDAME0gGog72wgtmzzrugYIQOymwEkCzieKLM y4H0VqRDgamczWzatFSY6L6aSZPYNaQsD5Ni5tXeJUVOtMae0Kd0GAJaamcCL/Hie49X u9ZPwybvz2gr9S+ep1u2b6IrnJhJQXsyOxuafpizVnRszLAXlM2z5ZmB/LkqxdT+xumo g/Jf9UMzDQSrSQX7CM61d0YB1exnMCDHqg9d6R4FKmVCDjYdtibyKQlHTaMxNUleHlfD 72fCaXaArddNAVocA8hMPxh70aTT00OAaXVlUNT0fM20X3z1DhlXwR8TaMVntZVMZwua WXXw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=CUmamgVPWC8t/6q/thxwT1RMwcukOkFztCjOcqqsVho=; b=Xe6jOY4JuBkwKk/MMk9hMea7ueHWbHAuPIyEIrERDpQ8+wy8Xu3odbpfSfM7Fu41Wi Fg6vIvSMH2UbgU7VdT7rZe/ksIXqdAWGZu5xHZkulhSaOGe+U+PsrwrFQFSEFFswZQ66 MNz6yOfvVBwTZ59h+cKO8QywGHngn4JJ4uu2Lms7S5TiORjJJ2LRArQtfvLCOTWPa/My wsgP9kDSWW69s99CydUGuTh2OnpE+uKZL3rPIQBbN/B2igJlhH0Rtza+QN25aOszCdz/ 5tchJ60jwx0/mSnKV9AF2rtXKikXddQF72OgTEle/qvIKHAMdT+GNZ81JvEUyfNPvIbV GCnA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b="AH/gyS9T"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w1si1556350edt.513.2021.06.02.21.44.41; Wed, 02 Jun 2021 21:45:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b="AH/gyS9T"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229753AbhFCEp1 (ORCPT + 99 others); Thu, 3 Jun 2021 00:45:27 -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