From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f69.google.com (mail-wm0-f69.google.com [74.125.82.69]) by kanga.kvack.org (Postfix) with ESMTP id F10D26B0038 for ; Sat, 3 Sep 2016 06:11:43 -0400 (EDT) Received: by mail-wm0-f69.google.com with SMTP id u81so29963087wmu.3 for ; Sat, 03 Sep 2016 03:11:43 -0700 (PDT) Received: from mail-lf0-x231.google.com (mail-lf0-x231.google.com. [2a00:1450:4010:c07::231]) by mx.google.com with ESMTPS id d124si7453291lfe.378.2016.09.03.03.11.42 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 03 Sep 2016 03:11:42 -0700 (PDT) Received: by mail-lf0-x231.google.com with SMTP id b199so99079211lfe.0 for ; Sat, 03 Sep 2016 03:11:42 -0700 (PDT) MIME-Version: 1.0 From: Dmitry Vyukov Date: Sat, 3 Sep 2016 12:11:21 +0200 Message-ID: Subject: mm: kernel BUG in page_add_new_anon_rmap (khugepaged) Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli , =?UTF-8?B?RWJydSBBa2Fnw7xuZMO8eg==?= , "Kirill A. Shutemov" , Andrew Morton , Vlastimil Babka , Mel Gorman , Johannes Weiner , "linux-mm@kvack.org" , LKML , Vegard Nossum , Sasha Levin , Konstantin Khlebnikov , Andrey Ryabinin , Greg Thelen , Suleiman Souhlal , Hugh Dickins , David Rientjes Hello, I've got another BUG in khugepaged while running syzkaller fuzzer: kernel BUG at mm/rmap.c:1248! invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 2 PID: 1340 Comm: khugepaged Not tainted 4.8.0-rc3-next-20160825+ #8 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff88006a40c580 task.stack: ffff88006a438000 RIP: 0010:[] [] page_add_new_anon_rmap+0x2e0/0x450 mm/rmap.c:1248 RSP: 0018:ffff88006a43f9c8 EFLAGS: 00010296 RAX: 0000000000000154 RBX: ffffea0000548000 RCX: 0000000000000000 RDX: 0000000000000154 RSI: 0000000000000001 RDI: ffffed000d487f15 RBP: ffff88006a43fa00 R08: 0000000000000001 R09: 0000000000000000 R10: ffff88003cc505c0 R11: 0000000000000001 R12: ffff880038cecd00 R13: 000000c440200000 R14: 0000000000000001 R15: ffff88006a43fb88 FS: 0000000000000000(0000) GS:ffff88006d200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c43d56a000 CR3: 000000000861c000 CR4: 00000000000006e0 DR0: 000000000000001e DR1: 000000000000001e DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Stack: ffffea0000f29c40 ffff880000000200 80000000152000e7 ffff880038cecd00 ffffea0000f29c40 ffffea0000548000 ffff88006a43fb88 ffff88006a43fbb0 ffffffff81830466 ffffed000719d9a8 ffff880038cecd40 ffffffff00000001 Call Trace: [] collapse_huge_page+0x2d36/0x3500 mm/khugepaged.c:1066 [< inline >] khugepaged_scan_pmd mm/khugepaged.c:1205 [< inline >] khugepaged_scan_mm_slot mm/khugepaged.c:1718 [< inline >] khugepaged_do_scan mm/khugepaged.c:1799 [] khugepaged+0x1dcb/0x2b30 mm/khugepaged.c:1844 [] kthread+0x23f/0x2d0 kernel/kthread.c:209 [] ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 Code: df e8 a5 35 fc ff 0f 0b e8 fe 52 e1 ff 48 c7 c6 20 42 11 87 48 89 df e8 8f 35 fc ff 0f 0b e8 e8 52 e1 ff 4c 89 e7 e8 20 2d fc ff <0f> 0b e8 d9 52 e1 ff 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 RIP [] page_add_new_anon_rmap+0x2e0/0x450 mm/rmap.c:1248 RSP ---[ end trace 27dc22f88d620ad9 ]--- On 0f98f121e1670eaa2a2fbb675e07d6ba7f0e146f of linux-next. -- 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