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=-0.8 required=3.0 tests=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 0CE7AC4BA12 for ; Wed, 26 Feb 2020 13:45:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E3A5924683 for ; Wed, 26 Feb 2020 13:45:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726974AbgBZNpA (ORCPT ); Wed, 26 Feb 2020 08:45:00 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:48339 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726388AbgBZNpA (ORCPT ); Wed, 26 Feb 2020 08:45:00 -0500 Received: from 1.general.ppisati.uk.vpn ([10.172.193.134] helo=canonical.com) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1j6wzi-0007d7-Jm; Wed, 26 Feb 2020 13:44:58 +0000 Date: Wed, 26 Feb 2020 14:44:58 +0100 From: Paolo Pisati To: bpf@vger.kernel.org Cc: Daniel Borkmann , Alexei Starovoitov , Zi Shen Lim , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , netdev@vger.kernel.org Subject: selftests/bpf: arm64: test_verifier 13 "FAIL retval 65507 != -29 (run 1/1)" Message-ID: <20200226134458.GA65282@harukaze> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This particular selftest fails on arm64 (x86-64 is fine): $ sudo ./tools/testing/selftests/bpf/test_verifier -v 13 #13/p valid read map access into a read-only array 2 , verifier log: 0: (7a) *(u64 *)(r10 -8) = 0 1: (bf) r2 = r10 2: (07) r2 += -8 3: (18) r1 = 0xffff00becd0d8c00 5: (85) call bpf_map_lookup_elem#1 6: (15) if r0 == 0x0 goto pc+6 R0_w=map_value(id=0,off=0,ks=4,vs=48,imm=0) R10=fp0 fp-8_w=mmmmmmmm 7: (bf) r1 = r0 8: (b7) r2 = 4 9: (b7) r3 = 0 10: (b7) r4 = 0 11: (b7) r5 = 0 12: (85) call bpf_csum_diff#28 R0_w=map_value(id=0,off=0,ks=4,vs=48,imm=0) R1_w=map_value(id=0,off=0,ks=4,vs=48,imm=0) R2_w=inv4 R3_w=inv0 R4_w=inv0 R5_w=inv0 R10=fp0 fp-8_w=mmmmmmmm last_idx 12 first_idx 0 regs=4 stack=0 before 11: (b7) r5 = 0 regs=4 stack=0 before 10: (b7) r4 = 0 regs=4 stack=0 before 9: (b7) r3 = 0 regs=4 stack=0 before 8: (b7) r2 = 4 last_idx 12 first_idx 0 regs=10 stack=0 before 11: (b7) r5 = 0 regs=10 stack=0 before 10: (b7) r4 = 0 13: (95) exit from 6 to 13: safe processed 14 insns (limit 1000000) max_states_per_insn 0 total_states 1 peak_states 1 mark_read 1 FAIL retval 65507 != -29 (run 1/1) 0: (7a) *(u64 *)(r10 -8) = 0 1: (bf) r2 = r10 2: (07) r2 += -8 3: (18) r1 = 0xffff00becd0d8c00 5: (85) call bpf_map_lookup_elem#1 6: (15) if r0 == 0x0 goto pc+6 R0_w=map_value(id=0,off=0,ks=4,vs=48,imm=0) R10=fp0 fp-8_w=mmmmmmmm 7: (bf) r1 = r0 8: (b7) r2 = 4 9: (b7) r3 = 0 10: (b7) r4 = 0 11: (b7) r5 = 0 12: (85) call bpf_csum_diff#28 R0_w=map_value(id=0,off=0,ks=4,vs=48,imm=0) R1_w=map_value(id=0,off=0,ks=4,vs=48,imm=0) R2_w=inv4 R3_w=inv0 R4_w=inv0 R5_w=inv0 R10=fp0 fp-8_w=mmmmmmmm last_idx 12 first_idx 0 regs=4 stack=0 before 11: (b7) r5 = 0 regs=4 stack=0 before 10: (b7) r4 = 0 regs=4 stack=0 before 9: (b7) r3 = 0 regs=4 stack=0 before 8: (b7) r2 = 4 last_idx 12 first_idx 0 regs=10 stack=0 before 11: (b7) r5 = 0 regs=10 stack=0 before 10: (b7) r4 = 0 13: (95) exit from 6 to 13: safe processed 14 insns (limit 1000000) max_states_per_insn 0 total_states 1 peak_states 1 mark_read 1 Summary: 0 PASSED, 0 SKIPPED, 1 FAILED Above output without line wrapping: https://paste.ubuntu.com/p/qhCK8nJjKw/ Kernel version 5.4.21, config: https://paste.ubuntu.com/p/G3yxvvjRMS/ Anything i can do to help debug this? -- bye, p.