[Bug 27052] Module KVM : unable to handle kernel NULL pointer dereference at - bugzilla-daemon

From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 27052] Module KVM : unable to handle kernel NULL pointer dereference at
Date: Tue, 8 Feb 2011 10:50:15 GMT	[thread overview]
Message-ID: <201102081050.p18AoF0X003116@demeter1.kernel.org> (raw)
In-Reply-To: <bug-27052-28872@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=27052


--- Comment #20 from prochazka <prochazka.nicolas@gmail.com>  2011-02-08 10:50:13 ---
gfn=fffffffffffff001 idx=511 lvl=1 d=0 spte=0
sp->gfns[511] = fffffffffffff001
sp->gfns[511] = fffffffffffff001
sp->gfns[511] = fffffffffffff001
sp->gfns[510] = fffffffffffff001
sp->gfns[509] = fffffffffffff001
sp->gfns[508] = fffffffffffff001
sp->gfns[507] = fffffffffffff001
------------[ cut here ]------------
kernel BUG at arch/x86/kvm/mmu.c:727!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map
CPU 2 
Modules linked in: kvm_intel kvm bnx2 [last unloaded: kvm]

Pid: 29624, comm: qemu Not tainted 2.6.37 #4 0P010H/PowerEdge M600
RIP: 0010:[<ffffffffa009d7eb>]  [<ffffffffa009d7eb>] drop_spte+0x2ab/0x2b0
[kvm]
RSP: 0018:ffff8802be535a08  EFLAGS: 00010246
RAX: 0000000000000027 RBX: ffff8802ca8dbff8 RCX: 000000000003ffff
RDX: ffffffff81d550c8 RSI: 0000000000000082 RDI: 0000000000000246
RBP: ffff8802be535a28 R08: 000000000001705a R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000000f R12: fffffffffffff001
R13: ffff8802c47098c0 R14: ffff8802be744000 R15: ffff8802be535a84
FS:  00007f2090ae7710(0000) GS:ffff8800bfc80000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: 0000000001110000 CR3: 00000002c228a000 CR4: 00000000000426e0
DR0: 0000000000000090 DR1: 00000000000000a4 DR2: 00000000000000ff
DR3: 000000000000000f DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process qemu (pid: 29624, threadinfo ffff8802be534000, task ffff8807fe060000)
Stack:
 0000000000000ff8 ffff8802c47098c0 0000000009a7effc ffff8802fb9a3490
 ffff8802be535ab8 ffffffffa00a22a5 0000000000000001 000000000000fa03
 0000000000455c03 ffff880200000001 ffff880200000000 ffffffff00000001
Call Trace:
 [<ffffffffa00a22a5>] paging32_sync_page+0xe5/0x1c0 [kvm]
 [<ffffffffa009df9a>] __kvm_sync_page+0x5a/0xb0 [kvm]
 [<ffffffffa00a08d9>] mmu_sync_children+0x249/0x350 [kvm]
 [<ffffffff819a529e>] ? _raw_spin_lock+0xe/0x20
 [<ffffffffa00af073>] ? pic_unlock+0x23/0xb0 [kvm]
 [<ffffffffa00aef6a>] ? pic_update_irq+0x7a/0xf0 [kvm]
 [<ffffffffa00af388>] ? picdev_write+0x158/0x3d0 [kvm]
 [<ffffffff8100398e>] ? apic_timer_interrupt+0xe/0x20
 [<ffffffffa00a1535>] ? kvm_mmu_get_page+0x4b5/0x710 [kvm]
 [<ffffffffa00a0aa8>] mmu_sync_roots+0xc8/0x160 [kvm]
 [<ffffffffa00a1810>] kvm_mmu_load+0x80/0x420 [kvm]
 [<ffffffffa00987e5>] kvm_arch_vcpu_ioctl_run+0xc95/0xe20 [kvm]
 [<ffffffffa0086811>] kvm_vcpu_ioctl+0x561/0x860 [kvm]
 [<ffffffff8112176a>] ? do_readv_writev+0x1aa/0x1f0
 [<ffffffff81131087>] do_vfs_ioctl+0xa7/0x560
 [<ffffffff810840fe>] ? sys_futex+0xce/0x170
 [<ffffffff8113158f>] sys_ioctl+0x4f/0x80
 [<ffffffff81003042>] system_call_fastpath+0x16/0x1b
Code: 0f 4c 89 e6 41 c0 e8 05 48 89 da 41 83 e0 01 49 2b 55 30 48 c7 c7 38 a5
0b a0 48 c1 fa 03 e8 21 4f 90 e1 48 89 df e8 f5 fb ff ff <0f> 0b eb fe 90 55 48
89 e5 41 55 41 54 53 48 83 ec 08 0f 1f 44 
RIP  [<ffffffffa009d7eb>] drop_spte+0x2ab/0x2b0 [kvm]
 RSP <ffff8802be535a08>
---[ end trace 37175e4ac115e78c ]---

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