From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yk0-f174.google.com (mail-yk0-f174.google.com [209.85.160.174]) by kanga.kvack.org (Postfix) with ESMTP id 06A576B00E5 for ; Fri, 21 Feb 2014 17:46:41 -0500 (EST) Received: by mail-yk0-f174.google.com with SMTP id 20so7686726yks.5 for ; Fri, 21 Feb 2014 14:46:41 -0800 (PST) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id c9si7743383yhi.43.2014.02.21.14.46.41 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 21 Feb 2014 14:46:41 -0800 (PST) Message-ID: <5307D74C.5070002@oracle.com> Date: Fri, 21 Feb 2014 17:46:36 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: mm: kernel BUG at mm/huge_memory.c:1371! 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 Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the following (now with pretty line numbers!) spew: [ 746.125099] kernel BUG at mm/huge_memory.c:1371! [ 746.125775] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 746.126774] Dumping ftrace buffer: [ 746.127484] (ftrace buffer empty) [ 746.127781] Modules linked in: [ 746.128358] CPU: 2 PID: 19816 Comm: trinity-c127 Tainted: G W 3.14.0-rc3-next-20140221-sasha-00008-g0e660cf-dirty #114 [ 746.130196] task: ffff8803a7cc3000 ti: ffff8803a7f1c000 task.ti: ffff8803a7f1c000 [ 746.130317] RIP: 0010:[] [] zap_huge_pmd+0x17a/0x200 [ 746.130317] RSP: 0018:ffff8803a7f1dca8 EFLAGS: 00010246 [ 746.130317] RAX: ffff8801ab4ac000 RBX: ffff8803a7f1ddd8 RCX: 000000000000002e [ 746.130317] RDX: 0000000000000000 RSI: ffff8803a7cc3d00 RDI: 000000000172c000 [ 746.130317] RBP: ffff8803a7f1dce8 R08: 0000000000000000 R09: 0000000000000000 [ 746.130317] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea0006a8fa00 [ 746.130317] R13: ffffea0005cb0000 R14: 00007f784f800000 R15: 00007f785750bfff [ 746.130317] FS: 00007f785afbc700(0000) GS:ffff8801abc00000(0000) knlGS:0000000000000000 [ 746.130317] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 746.130317] CR2: 0000000000000010 CR3: 00000003a9739000 CR4: 00000000000006e0 [ 746.130317] DR0: 0000000000693000 DR1: 0000000000000000 DR2: 0000000000000000 [ 746.130317] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 [ 746.130317] Stack: [ 746.130317] 00000000000004de ffff8803a9777390 ffff8803a7f1dce8 ffff8803a2afd3e0 [ 746.130317] 00007f784f800000 00007f785750c000 ffff8803a7f1ddd8 00007f785750bfff [ 746.130317] ffff8803a7f1dd78 ffffffff81285536 00000000001d8500 00007f784fa00000 [ 746.130317] Call Trace: [ 746.130317] [] unmap_page_range+0x2c6/0x410 [ 746.130317] [] unmap_single_vma+0xf1/0x110 [ 746.130317] [] zap_page_range+0x121/0x170 [ 746.130317] [] madvise_vma+0x180/0x1c0 [ 746.130317] [] SyS_madvise+0x17e/0x250 [ 746.130317] [] tracesys+0xdd/0xe2 [ 746.152464] Code: 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 81 80 60 03 00 00 00 fe ff ff 49 8b 45 00 f6 c4 40 75 18 31 f6 4c 89 ef e8 26 29 f9 ff <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 ff 48 [ 746.152464] RIP [] zap_huge_pmd+0x17a/0x200 [ 746.152464] 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