From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f175.google.com (mail-qc0-f175.google.com [209.85.216.175]) by kanga.kvack.org (Postfix) with ESMTP id 65F446B0073 for ; Thu, 27 Feb 2014 08:35:14 -0500 (EST) Received: by mail-qc0-f175.google.com with SMTP id m20so2486764qcx.6 for ; Thu, 27 Feb 2014 05:35:14 -0800 (PST) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id 74si2102018qgf.18.2014.02.27.05.35.13 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 27 Feb 2014 05:35:13 -0800 (PST) Message-ID: <530F3F0A.5040304@oracle.com> Date: Thu, 27 Feb 2014 08:35:06 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: mm: kernel BUG at mm/huge_memory.c:2785! Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "linux-mm@kvack.org" Cc: Andrew Morton , LKML , "Kirill A. Shutemov" Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the following spew: [ 1428.146261] kernel BUG at mm/huge_memory.c:2785! [ 1428.147100] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 1428.148512] Dumping ftrace buffer: [ 1428.149497] (ftrace buffer empty) [ 1428.150248] Modules linked in: [ 1428.151164] CPU: 106 PID: 29430 Comm: trinity-c106 Tainted: G W 3.14.0-rc4-next-20140226-sasha-00013-g082bdac-dirty #4 [ 1428.153515] task: ffff8808906c8000 ti: ffff880890aa6000 task.ti: ffff880890aa6000 [ 1428.154274] RIP: 0010:[] [] __split_huge_page_pmd+0x3f/0x2e0 [ 1428.154274] RSP: 0018:ffff880890aa7c98 EFLAGS: 00010287 [ 1428.154274] RAX: ffff880890f34000 RBX: ffff880b3c6791a0 RCX: 00003ffffffff000 [ 1428.154274] RDX: ffff880b3c6791a0 RSI: 00007f29869b4000 RDI: ffff8803dcbd6400 [ 1428.154274] RBP: ffff880890aa7ce8 R08: 00007f29869b5000 R09: 0000000000000000 [ 1428.154274] R10: 0000000000000000 R11: 0000000000000000 R12: ffff880b3c6791a0 [ 1428.154274] R13: 00007f2986800000 R14: ffff8803dcbd6400 R15: 00007f29869b4fff [ 1428.154274] FS: 00007f298bb67700(0000) GS:ffff8803de800000(0000) knlGS:0000000000000000 [ 1428.154274] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1428.154274] CR2: 00007f298b978608 CR3: 00000008907c3000 CR4: 00000000000006e0 [ 1428.154274] DR0: 8200000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1428.154274] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 [ 1428.154274] Stack: [ 1428.154274] 00000000001d8400 0000000000000001 ffff880890aa7cc8 ffff880890f34000 [ 1428.154274] ffffffff876bcfe0 ffff880b3c6791a0 00007f29869b4000 00007f29869b5000 [ 1428.154274] ffff880890aa7e18 00007f29869b4fff ffff880890aa7d78 ffffffff8127ff06 [ 1428.154274] Call Trace: [ 1428.154274] [] unmap_page_range+0x2a6/0x410 [ 1428.154274] [] unmap_single_vma+0xf1/0x110 [ 1428.154274] [] unmap_vmas+0x61/0xa0 [ 1428.154274] [] unmap_region+0xbc/0x120 [ 1428.154274] [] do_munmap+0x27a/0x350 [ 1428.154274] [] ? vm_munmap+0x41/0x80 [ 1428.154274] [] vm_munmap+0x4f/0x80 [ 1428.154274] [] SyS_munmap+0x27/0x40 [ 1428.154274] [] tracesys+0xdd/0xe2 [ 1428.154274] Code: e5 00 00 e0 ff 53 49 89 d4 48 83 ec 28 48 8b 47 40 48 89 45 c8 4c 3b 2f 72 11 49 8d 95 00 00 20 00 48 89 55 c0 48 39 57 08 73 11 <0f> 0b 0f 1f 80 00 00 00 00 eb fe 66 0f 1f 44 00 00 4c 89 e3 49 [ 1428.154274] RIP [] __split_huge_page_pmd+0x3f/0x2e0 [ 1428.154274] 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