From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ea0-f172.google.com (mail-ea0-f172.google.com [209.85.215.172]) by kanga.kvack.org (Postfix) with ESMTP id 4C7E86B00EA for ; Fri, 21 Feb 2014 18:51:51 -0500 (EST) Received: by mail-ea0-f172.google.com with SMTP id l9so1862280eaj.17 for ; Fri, 21 Feb 2014 15:51:50 -0800 (PST) Received: from jenni1.inet.fi (mta-out.inet.fi. [195.156.147.13]) by mx.google.com with ESMTP id i7si19310233eem.169.2014.02.21.15.51.48 for ; Fri, 21 Feb 2014 15:51:49 -0800 (PST) Date: Sat, 22 Feb 2014 01:51:45 +0200 From: "Kirill A. Shutemov" Subject: Re: mm: kernel BUG at mm/huge_memory.c:1371! Message-ID: <20140221235145.GA18046@node.dhcp.inet.fi> References: <5307D74C.5070002@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5307D74C.5070002@oracle.com> Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: "linux-mm@kvack.org" , Andrew Morton , LKML On Fri, Feb 21, 2014 at 05:46:36PM -0500, Sasha Levin wrote: > 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! It "VM_BUG_ON_PAGE(!PageHead(page), page);", correct? I don't see dump_page() output. > [ 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 from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Kirill A. Shutemov -- 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