From patchwork Mon Mar 1 16:12:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 390016 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 A8DAAC4321A for ; Mon, 1 Mar 2021 17:18:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 763516504B for ; Mon, 1 Mar 2021 17:18:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237893AbhCARSI (ORCPT ); Mon, 1 Mar 2021 12:18:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:46316 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235256AbhCARKH (ORCPT ); Mon, 1 Mar 2021 12:10:07 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 901546501F; Mon, 1 Mar 2021 16:42:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614616951; bh=vfBdK0l7+sF8x5IEXNA7JlL4FVfCyP39dCqO8A27meM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F3/nrietp9ZAYerQPbxdKFrQm4AUJTeu+Z3QB4Wjaf/S21QF7ajIjTT4ov4/QBkyP YDQSv94WdYFhSGRA7/BZVpDWNaF6XWcMW4NC6wprrgwxbrZeow6criSzbgoOb7LMfi hIOXbemTE8t2RXSdc35Cefi+ghZwYJRQgRuSt1XU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Namhyung Kim , Adrian Hunter , Alexander Shishkin , Andi Kleen , Ian Rogers , Ingo Molnar , Jiri Olsa , Mark Rutland , Peter Zijlstra , Stephane Eranian , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 4.19 151/247] perf test: Fix unaligned access in sample parsing test Date: Mon, 1 Mar 2021 17:12:51 +0100 Message-Id: <20210301161039.052097327@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161031.684018251@linuxfoundation.org> References: <20210301161031.684018251@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Namhyung Kim [ Upstream commit c5c97cadd7ed13381cb6b4bef5c841a66938d350 ] The ubsan reported the following error. It was because sample's raw data missed u32 padding at the end. So it broke the alignment of the array after it. The raw data contains an u32 size prefix so the data size should have an u32 padding after 8-byte aligned data. 27: Sample parsing :util/synthetic-events.c:1539:4: runtime error: store to misaligned address 0x62100006b9bc for type '__u64' (aka 'unsigned long long'), which requires 8 byte alignment 0x62100006b9bc: note: pointer points here 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ #0 0x561532a9fc96 in perf_event__synthesize_sample util/synthetic-events.c:1539:13 #1 0x5615327f4a4f in do_test tests/sample-parsing.c:284:8 #2 0x5615327f3f50 in test__sample_parsing tests/sample-parsing.c:381:9 #3 0x56153279d3a1 in run_test tests/builtin-test.c:424:9 #4 0x56153279c836 in test_and_print tests/builtin-test.c:454:9 #5 0x56153279b7eb in __cmd_test tests/builtin-test.c:675:4 #6 0x56153279abf0 in cmd_test tests/builtin-test.c:821:9 #7 0x56153264e796 in run_builtin perf.c:312:11 #8 0x56153264cf03 in handle_internal_command perf.c:364:8 #9 0x56153264e47d in run_argv perf.c:408:2 #10 0x56153264c9a9 in main perf.c:538:3 #11 0x7f137ab6fbbc in __libc_start_main (/lib64/libc.so.6+0x38bbc) #12 0x561532596828 in _start ... SUMMARY: UndefinedBehaviorSanitizer: misaligned-pointer-use util/synthetic-events.c:1539:4 in Fixes: 045f8cd8542d ("perf tests: Add a sample parsing test") Signed-off-by: Namhyung Kim Acked-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Peter Zijlstra Cc: Stephane Eranian Link: https://lore.kernel.org/r/20210214091638.519643-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/tests/sample-parsing.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c index 0e2d00d69e6e2..66e46bc8d6f1d 100644 --- a/tools/perf/tests/sample-parsing.c +++ b/tools/perf/tests/sample-parsing.c @@ -173,7 +173,7 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format) .data = {1, 211, 212, 213}, }; u64 regs[64]; - const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL}; + const u32 raw_data[] = {0x12345678, 0x0a0b0c0d, 0x11020304, 0x05060708, 0 }; const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL}; struct perf_sample sample = { .ip = 101,