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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0AE29EB64DA for ; Tue, 4 Jul 2023 16:21:33 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qGim9-0004kU-32; Tue, 04 Jul 2023 12:21:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qGim7-0004kB-E2 for qemu-devel@nongnu.org; Tue, 04 Jul 2023 12:21:11 -0400 Received: from mail-lj1-x234.google.com ([2a00:1450:4864:20::234]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qGim3-0006Td-TG for qemu-devel@nongnu.org; Tue, 04 Jul 2023 12:21:10 -0400 Received: by mail-lj1-x234.google.com with SMTP id 38308e7fff4ca-2b5c231f842so86149621fa.2 for ; Tue, 04 Jul 2023 09:21:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688487665; x=1691079665; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=1fcddEPTkQdKCH2znvJdFzvdfgSmE3hL5aPgd53HswY=; b=YzIkx2Qp9F24N8FExR4IFdgS/8sLzhKXzbGI1PmBLvR2qyG1p7h7mCFBY8sSTRtG94 NOkW1lr2648rnFdYk/QQx4v0PaJvLwO4y86Dy7nNuRoVhS5qb4CmgqpLXTGA7vtcL6FT DD7UsQ8HQTWxSx2QNL3RZBkfUo3JoqWVp1Q08xj/peJoTu+CTi+XnIjy9SYiL+zUg21y O3kDtGyKdlLIyYwHlvCUrgj4KjTdHraPnksVpiCp/bBwryvBMACAHXfk9A/Oxxu0W4Y/ rURXV01AdkJYkcZDJiPwTtXwNWsVeZpS322jN+JNaTbZbycpEWNQfaOVpZ6iq409NDGp 5W5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688487665; x=1691079665; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=1fcddEPTkQdKCH2znvJdFzvdfgSmE3hL5aPgd53HswY=; b=VXSOwVEnv2E8pT4+6a3/TYvbPNswjoTQagErDvMHHMQicu2gcXBu3PkRUzIGiCFmvH ZCkqypS71O1Z0C3Du8GBteno6AkmSs7LpMPdWxmUVque9VvPuUtuedvckOLmOmV4quVl FjkXV/D5/vjAX7wliSOFDkOFzd0wKbYMUCfvC5CliL1eNoyww/6siP0VAQLkvUWNfYSK Ru3xJCaFApqv67sSiOkA/lrtuubO+bYsL3AZWVAfRPFQrPHsXiqnJLRsC6gQ3J0q3PK0 XGsdbyl8wzV1W0GeEQDStDhOLaZEZTuDDp+EdmZX4zkWV/s7DAJnV+tihl6GQxQzLIpl xOGQ== X-Gm-Message-State: ABy/qLYRlKkP9/XOXCU3li/OLfxO8oDqjbTK5mC2GXSYikZduZ2c5nXa H/cx7qopj7C/DFvuswY9sr1ethuFqFL1LwlfmzcmAxWnkDA+9FtA X-Google-Smtp-Source: APBJJlHN4FpZzPYYp9Y067TGuDlwNz1U61zErVonMcUEEv1V9mD50ZA1g9yvA+ar+UCa5EO7tRhhED4Xqbp2GULT7ew= X-Received: by 2002:a2e:9844:0:b0:2b6:cbba:1307 with SMTP id e4-20020a2e9844000000b002b6cbba1307mr9253360ljj.0.1688487665553; Tue, 04 Jul 2023 09:21:05 -0700 (PDT) MIME-Version: 1.0 From: Peter Maydell Date: Tue, 4 Jul 2023 17:20:54 +0100 Message-ID: Subject: intermittent clang sanitizer failure during 'make check-tcg': null pointer deref in IntervalTreeNode To: QEMU Developers , Richard Henderson Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2a00:1450:4864:20::234; envelope-from=peter.maydell@linaro.org; helo=mail-lj1-x234.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org If you build QEMU with the clang UB sanitizer and do a 'make check-tcg' run, it can fail like this: TEST vma-pthread-with-libinsn.so on aarch64 ../../util/interval-tree.c:751:32: runtime error: member access within null pointer of type 'IntervalTreeNode' (aka 'struct IntervalTreeNode') SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../util/interval-tree.c:751:32 in SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../util/interval-tree.c:751:32 in make[1]: *** [Makefile:181: run-plugin-vma-pthread-with-libinsn.so] Error 124 make: *** [/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/tests/Makefile.include:56: run-tcg-tests-aarch64-linux-user] Error 2 I only saw this once; when I re-ran the test passed... thanks -- PMM