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=-1.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_SBL,URIBL_SBL_A, USER_AGENT_SANE_1 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 F368BC17441 for ; Fri, 8 Nov 2019 23:37:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6EAB215EA for ; Fri, 8 Nov 2019 23:37:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726349AbfKHXhz (ORCPT ); Fri, 8 Nov 2019 18:37:55 -0500 Received: from www62.your-server.de ([213.133.104.62]:58128 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726231AbfKHXhz (ORCPT ); Fri, 8 Nov 2019 18:37:55 -0500 Received: from sslproxy05.your-server.de ([78.46.172.2]) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1iTDp8-0002Zv-03; Sat, 09 Nov 2019 00:37:50 +0100 Received: from [178.197.248.27] (helo=pc-9.home) by sslproxy05.your-server.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1iTDp7-0007vU-Mo; Sat, 09 Nov 2019 00:37:49 +0100 Subject: Re: Fw: [Bug 205469] New: x86_32: bpf: multiple test_bpf failures using eBPF JIT To: Wang YanQing Cc: Stephen Hemminger , Alexei Starovoitov , Martin KaFai Lau , Song Liu , Yonghong Song , bpf@vger.kernel.org References: <20191108075711.115a5f94@hermes.lan> From: Daniel Borkmann Message-ID: <08b98fbd-f295-3a94-8b3e-70790179290c@iogearbox.net> Date: Sat, 9 Nov 2019 00:37:49 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20191108075711.115a5f94@hermes.lan> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.101.4/25627/Fri Nov 8 11:02:39 2019) Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org [ Cc Wang (x86_32 BPF JIT maintainer) ] On 11/8/19 4:57 PM, Stephen Hemminger wrote: > > Begin forwarded message: > > Date: Fri, 08 Nov 2019 07:35:59 +0000 > From: bugzilla-daemon@bugzilla.kernel.org > To: stephen@networkplumber.org > Subject: [Bug 205469] New: x86_32: bpf: multiple test_bpf failures using eBPF JIT > > > https://bugzilla.kernel.org/show_bug.cgi?id=205469 > > Bug ID: 205469 > Summary: x86_32: bpf: multiple test_bpf failures using eBPF JIT > Product: Networking > Version: 2.5 > Kernel Version: 4.19.81 LTS > Hardware: i386 > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > Assignee: stephen@networkplumber.org > Reporter: itugrok@yahoo.com > CC: itugrok@yahoo.com > Regression: No > > Created attachment 285829 > --> https://bugzilla.kernel.org/attachment.cgi?id=285829&action=edit > test_bpf failures: kernel 4.19.81/x86_32 (OpenWrt) > > Summary: > ======== > > Running the 4.19.81 LTS kernel on QEMU/x86_32, the standard test_bpf.ko > testsuite generates multiple errors with the eBPF JIT enabled: > > ... > test_bpf: #32 JSET jited:1 40 ret 0 != 20 46 FAIL > test_bpf: #321 LD_IND word positive offset jited:1 ret 0 != -291897430 FAIL > test_bpf: #322 LD_IND word negative offset jited:1 ret 0 != -1437222042 FAIL > test_bpf: #323 LD_IND word unaligned (addr & 3 == 2) jited:1 ret 0 != > -1150890889 FAIL > test_bpf: #326 LD_IND word positive offset, all ff jited:1 ret 0 != -1 FAIL > ... > test_bpf: Summary: 373 PASSED, 5 FAILED, [344/366 JIT'ed] > > However, with eBPF JIT disabled (net.core.bpf_jit_enable=0) all tests pass. > > > Steps to Reproduce: > =================== > > # sysctl net.core.bpf_jit_enable=1 > # modprobe test_bpf > > > > Affected Systems Tested: > ======================== > > OpenWrt master on QEMU/pc-q35(x86_32) [LTS kernel 4.19.81] > > > Kernel Logs: > ============ > > Boot log with test results is attached. >