From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f49.google.com (mail-yh0-f49.google.com [209.85.213.49]) by kanga.kvack.org (Postfix) with ESMTP id 2EDFA6B0035 for ; Wed, 18 Dec 2013 10:37:48 -0500 (EST) Received: by mail-yh0-f49.google.com with SMTP id z20so5376220yhz.36 for ; Wed, 18 Dec 2013 07:37:47 -0800 (PST) Received: from userp1040.oracle.com (userp1040.oracle.com. [156.151.31.81]) by mx.google.com with ESMTPS id p5si263394yho.234.2013.12.18.07.37.46 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 18 Dec 2013 07:37:46 -0800 (PST) Message-ID: <52B1C143.8080301@oracle.com> Date: Wed, 18 Dec 2013 10:37:39 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: mm: kernel BUG at include/linux/swapops.h:131! Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: "linux-mm@kvack.org" , khlebnikov@openvz.org, LKML Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel, I've stumbled on the following spew. The code is in zap_pte_range(): if (!non_swap_entry(entry)) rss[MM_SWAPENTS]--; else if (is_migration_entry(entry)) { struct page *page; page = migration_entry_to_page(entry); <==== HERE if (PageAnon(page)) rss[MM_ANONPAGES]--; else rss[MM_FILEPAGES]--; [ 2622.589064] kernel BUG at include/linux/swapops.h:131! [ 2622.589064] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 2622.589064] Dumping ftrace buffer: [ 2622.589064] (ftrace buffer empty) [ 2622.589064] Modules linked in: [ 2622.589064] CPU: 9 PID: 15984 Comm: trinity-child16 Tainted: G W 3.13.0-rc 4-next-20131217-sasha-00013-ga878504-dirty #4150 [ 2622.589064] task: ffff88168346b000 ti: ffff8816561d8000 task.ti: ffff8816561d8000 [ 2622.589064] RIP: 0010:[] [] zap_pte_range+0x360 /0x4a0 [ 2622.589064] RSP: 0018:ffff8816561d9c18 EFLAGS: 00010246 [ 2622.589064] RAX: ffffea00736a6600 RBX: ffff88200299d068 RCX: 0000000000000009 [ 2622.589064] RDX: 022fffff80380000 RSI: ffffea0000000000 RDI: 3c00000001cda998 [ 2622.589064] RBP: ffff8816561d9cb8 R08: 0000000000000000 R09: 0000000000000000 [ 2622.589064] R10: 0000000000000001 R11: 0000000000000000 R12: 00007fc7ee20d000 [ 2622.589064] R13: ffff8816561d9de8 R14: 000000039b53303c R15: 00007fc7ee29b000 [ 2622.589064] FS: 00007fc7eeceb700(0000) GS:ffff882011a00000(0000) knlGS:000000000000 0000 [ 2622.589064] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 2622.589064] CR2: 000000000068c000 CR3: 0000000005c26000 CR4: 00000000000006e0 [ 2622.589064] Stack: [ 2622.589064] ffff8816561d9c58 0000000000000286 ffff88168327b060 ffff88168327b060 [ 2622.589064] 00007fc700000160 ffff881667067b88 00000000c8f4b120 00ff88168327b060 [ 2622.589064] ffff88168327b060 ffff8820051a8600 0000000000000000 ffff88168327b000 [ 2622.589064] Call Trace: [ 2622.589064] [] unmap_page_range+0x3ee/0x400 [ 2622.589064] [] unmap_single_vma+0x101/0x120 [ 2622.589064] [] unmap_vmas+0x61/0xa0 [ 2622.589064] [] exit_mmap+0xd0/0x170 [ 2622.589064] [] mmput+0x70/0xe0 [ 2622.589064] [] exit_mm+0x18d/0x1a0 [ 2622.589064] [] ? acct_collect+0x175/0x1b0 [ 2622.589064] [] do_exit+0x24f/0x500 [ 2622.589064] [] do_group_exit+0xa9/0xe0 [ 2622.589064] [] SyS_exit_group+0x17/0x20 [ 2622.589064] [] tracesys+0xdd/0xe2 [ 2622.589064] Code: 83 f8 1f 75 46 48 b8 ff ff ff ff ff ff ff 01 48 be 00 00 00 00 00 ea ff ff 48 21 f8 48 c1 e0 06 48 01 f0 48 8b 10 80 e2 01 75 0a <0f> 0b 66 0f 1f 44 00 00 eb fe f6 40 08 01 74 05 ff 4d c4 eb 0b [ 2622.589064] RIP [] zap_pte_range+0x360/0x4a0 [ 2622.589064] RSP -- 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