From patchwork Mon May 7 14:45:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luc Van Oostenryck X-Patchwork-Id: 10384283 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E99996037F for ; Mon, 7 May 2018 14:46:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E65AD28BF9 for ; Mon, 7 May 2018 14:46:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DAEE128C07; Mon, 7 May 2018 14:46:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3DB2C28BF9 for ; Mon, 7 May 2018 14:46:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752114AbeEGOqI (ORCPT ); Mon, 7 May 2018 10:46:08 -0400 Received: from mail-wm0-f67.google.com ([74.125.82.67]:33747 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750732AbeEGOqG (ORCPT ); Mon, 7 May 2018 10:46:06 -0400 Received: by mail-wm0-f67.google.com with SMTP id x12-v6so15443797wmc.0 for ; Mon, 07 May 2018 07:46:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=MO4LJ+LZaF2xRcpI8FOhog6Jux8wh8uF4ZYDhL4NVC4=; b=O49YllEg39Fuk6YUQ01OQ1tXQWmAgqyOk8vwaXSu4ho2jC/TItUgrR0JP2yFdRXrc+ DA+rFCtIIjkKcuZIvAyDiMsp8pJwjeVXVHGdBGWB0zjYDUBi/UEX/A/Pr9LFpbKpW9HA BeXz9QEa7p2NprjUhugfvkCPlHhJM6nqFk6nWRWNXg6+XM3kAdGp7/xPD3psWkD0PJ2D oor4l3N7M290jRghcgXLPG7Oih9qgs6TtuUkqL2oEjwKy+acQXJVgAkeHaMSWR4DK6bi mMqT4/7kk6vPtBYh0z0twGFbgAZVVhQofvWd6hZLmh3M3QFRgqAk4x5DF+0hyEh2WjCE DFhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=MO4LJ+LZaF2xRcpI8FOhog6Jux8wh8uF4ZYDhL4NVC4=; b=MXtPbg0+u7NMaFNHTWVCdHC/CGEslx6CHIypIVixBOzOgykXgD8mT+vwuoCCOf17YJ 8XmGOWr7zlc9dJvaShHqK/5f6vhOwKVeb7SwZoSrlHpYSgILPm1gnz9VFyLWz1fJGn23 v4zF7xQwMFmTnKBuKwCzyaoAfo+AbUzczTjOruJTHptrLaUwye4qLQSqq0FLOclf7bux hssPPaE2x9DLKVE1Si6OFvSbt6NL0qJiR+G3LResI2uU+mOsyyQaSRVmWySGWd3fDMlr B4MAZxHyg3RmLGmKWnKobuGVyJYHBm2i7ShwfsLNRKkle9g4nQhRJ3hy+76SZyFnjYf4 Fuvw== X-Gm-Message-State: ALQs6tAoOz1pVJytyeHfCHCW86eDp3DYWECvR/zwwUHyKDiI25DBQeF4 rdHZzAtibJPZWDHS0LCoLXXYn1Qs X-Google-Smtp-Source: AB8JxZrRGa/fUZt2m1OzzGJoZfEM19FSTNlxR6bQ6aFr22i80W2TGzYRITfyT+NojRSHqzc3e1uGgg== X-Received: by 2002:a50:b5e3:: with SMTP id a90-v6mr49554177ede.69.1525704365653; Mon, 07 May 2018 07:46:05 -0700 (PDT) Received: from localhost.localdomain ([2a02:a03f:4094:c100:2c86:a26b:e58d:8ca6]) by smtp.gmail.com with ESMTPSA id r15-v6sm12408422edq.40.2018.05.07.07.46.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 May 2018 07:46:04 -0700 (PDT) From: Luc Van Oostenryck To: linux-sparse@vger.kernel.org Cc: Luc Van Oostenryck Subject: [PATCH 1/2] enum: add testcase for UB in oversized shift Date: Mon, 7 May 2018 16:45:55 +0200 Message-Id: <20180507144556.75808-2-luc.vanoostenryck@gmail.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180507144556.75808-1-luc.vanoostenryck@gmail.com> References: <20180507144556.75808-1-luc.vanoostenryck@gmail.com> Sender: linux-sparse-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sparse@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP type_is_ok(), used to calculate the base type of enums, has a bug related to UB when doing a full width rshift. Add a testcase for this. Signed-off-by: Luc Van Oostenryck --- validation/bug-rshift-ub.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 validation/bug-rshift-ub.c diff --git a/validation/bug-rshift-ub.c b/validation/bug-rshift-ub.c new file mode 100644 index 000000000..3a5f3a577 --- /dev/null +++ b/validation/bug-rshift-ub.c @@ -0,0 +1,17 @@ +enum a { + A = ~0ULL, +}; + +static enum a a = A; + +/* + * check-name: bug-rshift-ub + * check-known-to-fail + * check-description: + * This test trigger(ed) a bug on x86 caused by a + * full width shift (which is UB), expecting to get + * 0 but giving the unshifted value and as result + * the type is invalid: + * warning: incorrect type in initializer (invalid types) + * expected bad type enum a static [toplevel] a + */