From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f53.google.com (mail-pb0-f53.google.com [209.85.160.53]) by kanga.kvack.org (Postfix) with ESMTP id 292C66B0036 for ; Thu, 6 Mar 2014 16:16:17 -0500 (EST) Received: by mail-pb0-f53.google.com with SMTP id rp16so3142069pbb.26 for ; Thu, 06 Mar 2014 13:16:16 -0800 (PST) Received: from userp1040.oracle.com (userp1040.oracle.com. [156.151.31.81]) by mx.google.com with ESMTPS id e2si6098565pba.181.2014.03.06.13.16.15 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 06 Mar 2014 13:16:16 -0800 (PST) Message-ID: <5318E4BC.50301@oracle.com> Date: Thu, 06 Mar 2014 16:12:28 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: mm: kernel BUG at mm/mprotect.c:149 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Rik van Riel Cc: David Rientjes , Andrew Morton , "linux-mm@kvack.org" , LKML Hi Rik, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've hit the following spew. This seems to be introduced by your patch "mm,numa: reorganize change_pmd_range()". [ 886.745765] kernel BUG at mm/mprotect.c:149! [ 886.746831] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 886.748511] Dumping ftrace buffer: [ 886.749998] (ftrace buffer empty) [ 886.750110] Modules linked in: [ 886.751396] CPU: 20 PID: 26219 Comm: trinity-c216 Tainted: G W 3.14.0-rc5-next-20140305-sasha-00011-ge06f5f3-dirty #105 [ 886.751396] task: ffff8800b6c80000 ti: ffff880228436000 task.ti: ffff880228436000 [ 886.751396] RIP: 0010:[] [] change_protection_range+0x3b3/0x500 [ 886.751396] RSP: 0000:ffff880228437da8 EFLAGS: 00010282 [ 886.751396] RAX: 8000000527c008e5 RBX: 00007f647916e000 RCX: 0000000000000000 [ 886.751396] RDX: ffff8802ef488e40 RSI: 00007f6479000000 RDI: 8000000527c008e5 [ 886.751396] RBP: ffff880228437e78 R08: 0000000000000000 R09: 0000000000000000 [ 886.751396] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8802ef488e40 [ 886.751396] R13: 00007f6479000000 R14: 00007f647916e000 R15: 00007f646e34e000 [ 886.751396] FS: 00007f64b28d4700(0000) GS:ffff88052ba00000(0000) knlGS:0000000000000000 [ 886.751396] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 886.751396] CR2: 00007f64aed83af8 CR3: 0000000206e52000 CR4: 00000000000006a0 [ 886.751396] Stack: [ 886.751396] ffff880200000001 ffffffff8447f152 ffff880228437dd8 ffff880228af3000 [ 886.769142] 00007f646e34e000 00007f647916dfff 0000000000000000 00007f647916e000 [ 886.769142] ffff880206e527f0 00007f647916dfff 0000000000000000 0000000000000000 [ 886.769142] Call Trace: [ 886.769142] [] ? preempt_count_sub+0xe2/0x120 [ 886.769142] [] change_protection+0x25/0x30 [ 886.769142] [] change_prot_numa+0x1b/0x30 [ 886.769142] [] task_numa_work+0x279/0x360 [ 886.769142] [] task_work_run+0xae/0xf0 [ 886.769142] [] do_notify_resume+0x8e/0xe0 [ 886.769142] [] retint_signal+0x4d/0x92 [ 886.769142] Code: 49 8b 3c 24 48 83 3d fc 2e ba 04 00 75 12 0f 0b 0f 1f 84 00 00 00 00 00 eb fe 66 0f 1f 44 00 00 48 89 f8 66 66 66 90 84 c0 79 0d <0f> 0b 0f 1f 00 eb fe 66 0f 1f 44 00 00 8b 4d 9c 44 8b 4d 98 89 [ 886.769142] RIP [] change_protection_range+0x3b3/0x500 [ 886.769142] RSP Thanks, Sasha -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org