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Message-ID: <533D6D66.7030402@oracle.com> Date: Thu, 03 Apr 2014 10:17:10 -0400 From: Sasha Levin <sasha.levin@...cle.com> To: "linux-mm@...ck.org" <linux-mm@...ck.org> CC: Naoya Horiguchi <n-horiguchi@...jp.nec.com>, Andrew Morton <akpm@...ux-foundation.org>, LKML <linux-kernel@...r.kernel.org> Subject: mm: BUG in __phys_addr called from __walk_page_range Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel I've stumbled on the following: [ 942.869226] kernel BUG at arch/x86/mm/physaddr.c:26! [ 942.871710] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 942.871710] Dumping ftrace buffer: [ 942.871710] (ftrace buffer empty) [ 942.871710] Modules linked in: [ 942.871710] CPU: 16 PID: 17165 Comm: trinity-c55 Tainted: G W 3.14.0-next-20140402-sasha-00013-g0cfaf7e-dirty #367 [ 942.871710] task: ffff8801de603000 ti: ffff8801e7b4c000 task.ti: ffff8801e7b4c000 [ 942.871710] RIP: __phys_addr (arch/x86/mm/physaddr.c:26 (discriminator 1)) [ 942.871710] RSP: 0000:ffff8801e7b4daf8 EFLAGS: 00010287 [ 942.871710] RAX: 0000780000000000 RBX: 00007f11fb000000 RCX: 0000000000000009 [ 942.871710] RDX: 0000000080000000 RSI: 00007f11fae00000 RDI: 0000000000000000 [ 942.871710] RBP: ffff8801e7b4daf8 R08: 0000000000000000 R09: 0000000008640070 [ 942.871710] R10: 00007f11fae00000 R11: 00007f123ae00000 R12: ffffffffb54b2140 [ 942.871710] R13: 0000000000200000 R14: 00007f11fae00000 R15: ffff8801e7b4dc00 [ 942.871710] FS: 00007f123eb21700(0000) GS:ffff88046cc00000(0000) knlGS:0000000000000000 [ 942.871710] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 942.871710] CR2: 0000000000000000 CR3: 00000001de6bc000 CR4: 00000000000006a0 [ 942.871710] DR0: 0000000000696000 DR1: 0000000000696000 DR2: 0000000000000000 [ 942.871710] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000000057060a [ 942.871710] Stack: [ 942.871710] ffff8801e7b4db98 ffffffffae2c1651 ffff8801e7b4db38 0000000000000000 [ 942.871710] ffff8801debf40b0 0000000040000000 ffff880767bb4000 00007f11fadfffff [ 942.871710] 00007f11fadfffff 000000003fffffff 00007f11fae00000 ffff8801eb8c7000 [ 942.871710] Call Trace: [ 942.871710] __walk_page_range (include/linux/mm.h:1525 include/linux/mm.h:1530 include/linux/hugetlb.h:403 include/linux/hugetlb.h:451 mm/pagewalk.c:196 mm/pagewalk.c:254) [ 942.871710] walk_page_range (mm/pagewalk.c:333) [ 942.871710] queue_pages_range (mm/mempolicy.c:653) [ 942.871710] ? queue_pages_hugetlb (mm/mempolicy.c:492) [ 942.871710] ? queue_pages_range (mm/mempolicy.c:521) [ 942.871710] ? change_prot_numa (mm/mempolicy.c:588) [ 942.871710] migrate_to_node (mm/mempolicy.c:988) [ 942.871710] ? preempt_count_sub (kernel/sched/core.c:2527) [ 942.871710] do_migrate_pages (mm/mempolicy.c:1095) [ 942.871710] SYSC_migrate_pages (mm/mempolicy.c:1445) [ 942.871710] ? SYSC_migrate_pages (include/linux/rcupdate.h:800 mm/mempolicy.c:1391) [ 942.871710] SyS_migrate_pages (mm/mempolicy.c:1365) [ 942.871710] ia32_do_call (arch/x86/ia32/ia32entry.S:430) [ 942.871710] Code: 0f 0b 0f 1f 44 00 00 48 b8 00 00 00 00 00 78 00 00 48 01 f8 48 39 c2 72 12 0f b6 0d 10 0f fe 05 48 89 c2 48 d3 ea 48 85 d2 74 0c <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 5d c3 66 2e 0f 1f 84 00 00 [ 942.871710] RIP __phys_addr (arch/x86/mm/physaddr.c:26 (discriminator 1)) [ 942.871710] RSP <ffff8801e7b4daf8> Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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