From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754457AbcIILf4 (ORCPT ); Fri, 9 Sep 2016 07:35:56 -0400 Received: from smtp2.it.da.ut.ee ([193.40.5.67]:51644 "EHLO smtp2.it.da.ut.ee" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754413AbcIILfz (ORCPT ); Fri, 9 Sep 2016 07:35:55 -0400 Date: Fri, 9 Sep 2016 16:05:12 +0300 (EEST) From: Meelis Roos To: Linux Kernel list , linuxppc-dev@lists.ozlabs.org Subject: UBSAN: Undefined behaviour in arch/powerpc/kernel/cputable.c Message-ID: User-Agent: Alpine 2.20 (LRH 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Got this on my PowerPC G4 (533 MHz, PowerPC 7410, PowerMac3,4 platform), with gcc version 5.3.1 20160509 (Debian 5.3.1-19): [ 0.000000] ================================================================================ [ 0.000000] UBSAN: Undefined behaviour in arch/powerpc/kernel/cputable.c:2240:25 [ 0.000000] shift exponent 32 is too large for 32-bit type 'long unsigned int' [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.8.0-rc5-00075-gd71f058 #106 [ 0.000000] Call Trace: [ 0.000000] [c0a5ff10] [c03aa588] ubsan_epilogue+0x18/0x4c (unreliable) [ 0.000000] [c0a5ff20] [c03aab38] __ubsan_handle_shift_out_of_bounds+0xe8/0x13c [ 0.000000] [c0a5ffa0] [c07c42d0] cpu_feature_keys_init+0xa0/0xb8 [ 0.000000] [c0a5ffd0] [c07ca1fc] setup_feature_keys+0x14/0x24 [ 0.000000] [c0a5ffe0] [c07c6c74] machine_init+0x18/0x58 [ 0.000000] [c0a5fff0] [c000341c] start_here+0x38/0x78 [ 0.000000] ================================================================================ -- Meelis Roos (mroos@linux.ee)