Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751208AbdFCBpF (ORCPT ); Fri, 2 Jun 2017 21:45:05 -0400 Received: from mail-oi0-f47.google.com ([209.85.218.47]:34787 "EHLO mail-oi0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751135AbdFCBpE (ORCPT ); Fri, 2 Jun 2017 21:45:04 -0400 MIME-Version: 1.0 From: Bixuan Cui Date: Sat, 3 Jun 2017 09:45:02 +0800 Message-ID: Subject: kernel of next-20170602 call trace when run add_key02 in LTP To: linux-kernel@vger.kernel.org Cc: chrubis@suse.cz Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2218 Lines: 51 Hi, Compile kernel (next-20170602) and run ltp, find: / # ./add_key02 tst_test.c:878: INFO: Timeout per run is 0h 05m 00s [ 341.183219] BUG: unable to handle kernel NULL pointer dereference at (null) [ 341.183850] IP: memset+0x10/0x20 [ 341.184550] *pdpt = 0000000035441001 *pde = 0000000000000000 [ 341.184550] [ 341.184550] Oops: 0002 [#2] SMP [ 341.184550] Modules linked in: [ 341.184550] CPU: 0 PID: 124 Comm: add_key02 Tainted: G S D W 4.12.0-rc3-next-20170602 #3 [ 341.184550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 341.184550] task: f5b9ca00 task.stack: f6514000 [ 341.184550] EIP: memset+0x10/0x20 [ 341.184550] EFLAGS: 00000246 CPU: 0 [ 341.184550] EAX: 00000000 EBX: 00000000 ECX: 00000001 EDX: 00000000 [ 341.184550] ESI: 00000000 EDI: 00000000 EBP: f6515f24 ESP: f6515f1c [ 341.184550] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 341.184550] CR0: 80050033 CR2: 00000000 CR3: 36404920 CR4: 000006f0 [ 341.184550] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 341.184550] DR6: 00000000 DR7: 00000000 [ 341.184550] Call Trace: [ 341.184550] memzero_explicit+0xf/0x20 [ 341.184550] SyS_add_key+0x11f/0x1c0 [ 341.184550] ? change_pid+0x13/0x50 [ 341.184550] do_fast_syscall_32+0x8b/0x130 [ 341.184550] entry_SYSENTER_32+0x4e/0x7c [ 341.184550] EIP: 0xb772ddc1 [ 341.184550] EFLAGS: 00000246 CPU: 0 [ 341.184550] EAX: ffffffda EBX: 080de341 ECX: 080de346 EDX: 00000000 [ 341.184550] ESI: 00000001 EDI: fffffffc EBP: 0808aa97 ESP: bfe3636c [ 341.184550] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 341.184550] Code: 8a 0e 88 0f 8d b4 26 00 00 00 00 8b 45 f0 83 c4 04 5b 5e 5f 5d c3 90 8d 74 26 00 3e 8d 74 26 00 55 89 e5 57 89 c7 53 89 c3 89 d0 aa 89 d8 5b 5f 5d c3 90 90 90 90 90 90 90 90 3e 8d 74 26 00 [ 341.184550] EIP: memset+0x10/0x20 SS:ESP: 0068:f6515f1c [ 341.184550] CR2: 0000000000000000 [ 341.219144] ---[ end trace e3963c970d107f91 ]--- tst_test.c:928: INFO: If you are running on slow machine, try exporting LTP_TIMEOUT_MUL > 1 tst_test.c:929: BROK: Test killed! (timeout?) I try to use other tags and kernel on next-20170427 is ok, but next-20170502 fail. Is it bug? Thanks, Cui Bixuan