Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932365AbcDNNqV (ORCPT ); Thu, 14 Apr 2016 09:46:21 -0400 Received: from mout.gmx.net ([212.227.17.20]:57186 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755706AbcDNNqT (ORCPT ); Thu, 14 Apr 2016 09:46:19 -0400 To: x86@kernel.org Cc: Linux Kernel From: =?UTF-8?Q?Toralf_F=c3=b6rster?= Subject: 4.6.0-rc3 UBSAN: atomic.h:156:2,Apr 14 15:40:24 n22kvm-clone kernel: signed integer overflow: Message-ID: <570F9F21.7000209@gmx.de> Date: Thu, 14 Apr 2016 15:46:09 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:rW7rUS1/5JFjcqgHfeT/2fGiTFjDCGYXFnCWzrVyexGAqSh8frz cOJH0CNJxqb32xCZ1sf/99aAzIgPCXWGLJB7u4XgqkNvE5LmWco/HRCc2NhOjWHh0L0Wst7 qBGahgqC0GFf7FqKngy6lgcHg2PZo1VZ4f+Bn6PKEPo9flXC2M+haCX7MjRaLIeSYaYott1 iG8Pk+BPdUNdN3B9tw2vw== X-UI-Out-Filterresults: notjunk:1;V01:K0:xyBfTI4Pp1A=:CRDzQKtfNOz7FhOmlFaAhA 18LYIc1RJF4Nmb/x0F/8xFGp12r4YvVdmsKLnYKvFy/kpPO5aBR/zCs2fH4M5lpjsXdmd4Z5S 7bvb0z5H39AS0UUL5riOIbsdxnn9fUQGi7fnSIaVS0B3VIy9QF98D/8P0VMux1XND+KKTbB83 JqzOVmkMoMppr3KWZjvgrN1bRMRdIVPFasyV7UyQF9qGwcn1ozaPACjr951hUKssurULuXRAq yS8cx439kC04ntsxRYWJ/cmDYVZgb60vSAKyzv2g9lrFkCjYr4DYotK4FGHJ+fdW+qwuDXMyl 932sypgLO5K8ReaOhS/M9weUYToGrfQopf29NmknE68/rbjWWM64CFDMTd4zCMbSJa3X+ssJ7 5Vy/o9pkyPykBoEJgd8/aoTjXDBa3woipAiodNHpg4zHtR4w32Gw+LET46XriuIUHIE9ykJUS 5qeommyYLDPGdYev4U3e+R5YKUQyNSZPzT6sN8rQmibtVADuVk4ait2/BDTAfXsp7306k1doP GA+RA/A+pcH+5uGgxhsWrAwVpZCdqDfayni3GoBjckQzxkSOZ8wKYo21MVviReSpy3wjTG4lb 6B2qJUn5lUlgFM3v+dG15Bn1lfpkbbkuzaHJBxisLkyZrCwOfV05YSk/n+mVagfBxTlFYua1z HGig0pQoTeWHyZA+pp1VDqSt+SZgDH+DcxkZ2Fe/aM0j9ijw25WJGkPLbbUkYoAbb5kzdW75L NDq60/1HkQuaCH0c8g+LpDuBkN0anD2oxmEEX/LwEXF3lPvtyGnykmQON8R5Rqard/SgdphRW NEEysQcWec2U6yTu56ASELHNTqFVg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4359 Lines: 58 Got this at a 32 bit KVM during boot : Apr 14 15:40:24 n22kvm-clone kernel: ================================================================================ Apr 14 15:40:24 n22kvm-clone kernel: UBSAN: Undefined behaviour in ./arch/x86/include/asm/atomic.h:156:2 Apr 14 15:40:24 n22kvm-clone kernel: signed integer overflow: Apr 14 15:40:24 n22kvm-clone kernel: -1734152656 + -1656360868 cannot be represented in type 'int' Apr 14 15:40:24 n22kvm-clone kernel: CPU: 0 PID: 2393 Comm: ntpd Not tainted 4.6.0-rc3 #5 Apr 14 15:40:24 n22kvm-clone kernel: Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014 Apr 14 15:40:24 n22kvm-clone kernel: 00000000 00200086 f3d2da90 d6fe2fe8 00000007 f3d2dac0 9d45f05c f3d2daa0 Apr 14 15:40:24 n22kvm-clone kernel: d704887e f3d2daa0 d7d6bc6c f3d2db24 d7048bcb d7748588 f3d2dac4 0000002b Apr 14 15:40:24 n22kvm-clone kernel: f3d2daec d7d6bc6c 0000002b 00200286 3337312d 32353134 00363536 00000027 Apr 14 15:40:24 n22kvm-clone kernel: Call Trace: Apr 14 15:40:24 n22kvm-clone kernel: [] dump_stack+0x9f/0xe7 Apr 14 15:40:24 n22kvm-clone kernel: [] ubsan_epilogue+0xe/0x40 Apr 14 15:40:24 n22kvm-clone kernel: [] handle_overflow+0xbb/0xf0 Apr 14 15:40:24 n22kvm-clone kernel: [] ? copy_from_iter+0xc0/0x740 Apr 14 15:40:24 n22kvm-clone kernel: [] ? ip_generic_getfrag+0x8c/0xf0 Apr 14 15:40:24 n22kvm-clone kernel: [] __ubsan_handle_add_overflow+0x12/0x20 Apr 14 15:40:24 n22kvm-clone kernel: [] ip_idents_reserve+0x79/0xa0 Apr 14 15:40:24 n22kvm-clone kernel: [] __ip_select_ident+0xaf/0x150 Apr 14 15:40:24 n22kvm-clone kernel: [] __ip_make_skb+0x7bf/0x1200 Apr 14 15:40:24 n22kvm-clone kernel: [] ip_make_skb+0xd8/0x100 Apr 14 15:40:24 n22kvm-clone kernel: [] ? ip_reply_glue_bits+0x90/0x90 Apr 14 15:40:24 n22kvm-clone kernel: [] ? ip_reply_glue_bits+0x90/0x90 Apr 14 15:40:24 n22kvm-clone kernel: [] ? sock_recv_errqueue+0x300/0x300 Apr 14 15:40:24 n22kvm-clone kernel: [] udp_sendmsg+0x62d/0x15f0 Apr 14 15:40:24 n22kvm-clone kernel: [] ? ip_reply_glue_bits+0x90/0x90 Apr 14 15:40:24 n22kvm-clone kernel: [] ? rw_copy_check_uvector+0x67/0x1c0 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __lock_is_held+0x36/0x90 Apr 14 15:40:24 n22kvm-clone kernel: [] ? inet_sendmsg+0x106/0x350 Apr 14 15:40:24 n22kvm-clone kernel: [] inet_sendmsg+0x170/0x350 Apr 14 15:40:24 n22kvm-clone kernel: [] ? inet_sendmsg+0x29/0x350 Apr 14 15:40:24 n22kvm-clone kernel: [] ? ipip_gro_complete+0xa0/0xa0 Apr 14 15:40:24 n22kvm-clone kernel: [] ___sys_sendmsg+0x289/0x6a0 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __lock_is_held+0x36/0x90 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __fget+0x190/0x350 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __fget+0x1a4/0x350 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __fget+0x23/0x350 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __fget_light+0x42/0x170 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __fdget+0x12/0x20 Apr 14 15:40:24 n22kvm-clone kernel: [] ? sockfd_lookup_light+0x18/0xe0 Apr 14 15:40:24 n22kvm-clone kernel: [] __sys_sendmmsg+0xf0/0x1d0 Apr 14 15:40:24 n22kvm-clone kernel: [] ? kvm_clock_get_cycles+0x17/0x20 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __getnstimeofday64+0x102/0x460 Apr 14 15:40:24 n22kvm-clone kernel: [] ? getnstimeofday64+0xd/0x30 Apr 14 15:40:24 n22kvm-clone kernel: [] ? remove_vma+0x75/0x100 Apr 14 15:40:24 n22kvm-clone kernel: [] ? vm_munmap+0x45/0x70 Apr 14 15:40:24 n22kvm-clone kernel: [] ? do_fast_syscall_32+0x4e/0x960 Apr 14 15:40:24 n22kvm-clone kernel: [] SyS_sendmmsg+0x1f/0x30 Apr 14 15:40:24 n22kvm-clone kernel: [] do_fast_syscall_32+0x150/0x960 Apr 14 15:40:24 n22kvm-clone kernel: [] ? __sys_sendmmsg+0x1d0/0x1d0 Apr 14 15:40:24 n22kvm-clone kernel: [] sysenter_past_esp+0x4c/0x7f Apr 14 15:40:24 n22kvm-clone kernel: ================================================================================ -- Toralf PGP: C4EACDDE 0076E94E, OTR: 420E74C8 30246EE7