https://bugzilla.kernel.org/show_bug.cgi?id=27052 Summary: Module KVM : unable to handle kernel NULL pointer dereference at Product: Virtualization Version: unspecified Kernel Version: 2.6.37 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: kvm AssignedTo: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx ReportedBy: prochazka.nicolas@xxxxxxxxx Regression: No Hello, last git tree for qemu-kvm, kernel 2.6.37 , after some time guests ( Windows XP) qemu-kvm vms causes this : ( it seems to be specifiq on some server, here NecEXPRESS 5800 ) It is difficult to me to reproduce this problem ( not access to this server ) . On this server, bug is reproductible 100 % BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa001c38a>] gfn_to_rmap+0x2a/0x70 [kvm] PGD 1ca9c3067 PUD 1ccba0067 PMD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map CPU 3 Modules linked in: kvm_intel kvm Pid: 17700, comm: qemu Not tainted 2.6.37 #3 MS-9192-01S/Express5800/120Rh-1 [N8100-xxxxF] RIP: 0010:[<ffffffffa001c38a>] [<ffffffffa001c38a>] gfn_to_rmap+0x2a/0x70 [kvm] RSP: 0018:ffff8801caa179f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: fffffffffffff001 RCX: ffff8801ca14e948 RDX: 0000000000000000 RSI: fffffffffffff001 RDI: 00000000000fee01 RBP: ffff8801caa17a08 R08: ffff8801ca14e000 R09: 0000000000000022 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000009204ffc R14: ffff8801ca990000 R15: ffff8801caa17a84 FS: 00007f0c0ab6f710(0000) GS:ffff8800cfcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b CR2: 0000000000000000 CR3: 00000001cb8b7000 CR4: 00000000000026e0 DR0: 00000000000000a0 DR1: 0000000000000000 DR2: 0000000000000003 DR3: 00000000000000b0 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process qemu (pid: 17700, threadinfo ffff8801caa16000, task ffff8802463b4000) Stack: ffff88019f29fff8 ffff8801ca954000 ffff8801caa17a28 ffffffffa001c44c 0000000000000ff8 ffff880208c2d820 ffff8801caa17ab8 ffffffffa0021075 0000000400000001 0000000000005f99 0000000000424f99 0000000000000001 Call Trace: [<ffffffffa001c44c>] drop_spte+0x7c/0x1f0 [kvm] [<ffffffffa0021075>] paging32_sync_page+0xe5/0x1c0 [kvm] [<ffffffffa001cd6a>] __kvm_sync_page+0x5a/0xb0 [kvm] [<ffffffffa001f6a9>] mmu_sync_children+0x249/0x350 [kvm] [<ffffffffa00217ca>] ? kvm_mmu_pte_write+0x29a/0xaa0 [kvm] [<ffffffffa00238aa>] ? seg_base+0x1a/0x30 [kvm] [<ffffffffa001d4b2>] ? mmu_free_roots+0xc2/0x180 [kvm] [<ffffffffa0020305>] ? kvm_mmu_get_page+0x4b5/0x710 [kvm] [<ffffffffa001f878>] mmu_sync_roots+0xc8/0x160 [kvm] [<ffffffffa00205e0>] kvm_mmu_load+0x80/0x420 [kvm] [<ffffffffa00177e5>] kvm_arch_vcpu_ioctl_run+0xc95/0xe20 [kvm] [<ffffffff81081800>] ? wake_futex+0x40/0x60 [<ffffffffa0015fc0>] ? kvm_arch_vcpu_load+0x50/0x140 [kvm] [<ffffffffa0005811>] kvm_vcpu_ioctl+0x561/0x860 [kvm] [<ffffffff819aeeac>] ? schedule+0x31c/0x990 [<ffffffff81131087>] do_vfs_ioctl+0xa7/0x560 [<ffffffff81122b44>] ? fput+0x34/0x280 [<ffffffff810840fe>] ? sys_futex+0xce/0x170 [<ffffffff8113158f>] sys_ioctl+0x4f/0x80 [<ffffffff81003042>] system_call_fastpath+0x16/0x1b Code: 00 55 48 89 e5 48 83 ec 10 48 89 1c 24 4c 89 64 24 08 0f 1f 44 00 00 41 89 d4 48 89 f3 e8 af 3d fe ff 41 83 fc 01 48 89 c2 75 1a <48> 2b 18 48 8d 04 dd 00 00 00 00 48 03 42 18 48 8b 1c 24 4c 8b RIP [<ffffffffa001c38a>] gfn_to_rmap+0x2a/0x70 [kvm] RSP <ffff8801caa179f8> CR2: 0000000000000000 ---[ end trace 02041dca60973834 ]--- -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
