BUG: unable to handle kernel paging request in kvm_cpu_has_pending_timer

[syzbot]

Hello,

syzkaller hit the following crash on
fb20eb9d798d2f4c1a75b7fe981d72dfa8d7270d
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.

Unfortunately, I don't have any reproducer for this bug yet.


BUG: unable to handle kernel paging request at 00000000a570cd8a
IP: arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
IP: static_key_false include/linux/jump_label.h:142 [inline]
IP: lapic_in_kernel arch/x86/kvm/lapic.h:151 [inline]
IP: kvm_cpu_has_pending_timer+0xd/0x70 arch/x86/kvm/irq.c:36
PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 5201 Comm: syz-executor5 Not tainted 4.15.0-rc1-next-20171201+
#57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: 00000000c02a78de task.stack: 00000000d671e50e
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:142 [inline]
RIP: 0010:lapic_in_kernel arch/x86/kvm/lapic.h:151 [inline]
RIP: 0010:kvm_cpu_has_pending_timer+0xd/0x70 arch/x86/kvm/irq.c:36
RSP: 0018:ffff8801c666f698 EFLAGS: 00010216
RAX: 0000000000010000 RBX: ffff8801c5bf8c00 RCX: ffffffff8115ae3d
RDX: 00000000000026ca RSI: ffffc90003a7b000 RDI: ffff8801c5bf8c00
RBP: ffff8801c666f6a0 R08: 0000000000000001 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8748cd60 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8801c5bf8c30 R15: ffff8801c5bf8c00
FS: 00007fb6c7f4e700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001cf45c000 CR4: 00000000001426e0
Call Trace:
vcpu_run arch/x86/kvm/x86.c:7155 [inline]
kvm_arch_vcpu_ioctl_run+0x53e/0x5c60 arch/x86/kvm/x86.c:7314
kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2574
vfs_ioctl fs/ioctl.c:46 [inline]
do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007fb6c7f4dc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000015
RBP: 0000000000000589 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5578
R13: 00000000ffffffff R14: 00007fb6c7f4e6d4 R15: 0000000000000000
Code: 41 ff ff ff 4c 89 f7 48 89 55 d0 e8 4e 1f 91 00 48 8b 55 d0 e9 fc fe
ff ff 90 90 90 90 90 55 48 89 e5 53 48 89 fb e8 03 8c 5a 00 <cc> 1e 00 00
00 e8 f9 8b 5a 00 e8 f4 8b 5a 00 48 89 df e8 ac e9
RIP: arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline] RSP:
ffff8801c666f698
RIP: static_key_false include/linux/jump_label.h:142 [inline] RSP:
ffff8801c666f698
RIP: lapic_in_kernel arch/x86/kvm/lapic.h:151 [inline] RSP: ffff8801c666f698
RIP: kvm_cpu_has_pending_timer+0xd/0x70 arch/x86/kvm/irq.c:36 RSP:
ffff8801c666f698
CR2: fffffffffffffff8
---[ end trace e304b48527225e98 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
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[Dmitry Vyukov]

On Mon, Dec 4, 2017 at 1:25 PM, syzbot
<bot+f8b526f284f9ef5f5e...@syzkaller.appspotmail.com>
wrote:

#syz dup: BUG: unable to handle kernel paging request in __switch_to

> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
> Direct all questions to syzk...@googlegroups.com.
> Please credit me with: Reported-by: syzbot <syzk...@googlegroups.com>
>
> syzbot will keep track of this bug report.
> Once a fix for this bug is committed, please reply to this email with:
> #syz fix: exact-commit-title
> To mark this as a duplicate of another syzbot report, please reply with:
> #syz dup: exact-subject-of-another-report
> If it's a one-off invalid bug report, please reply with:
> #syz invalid
> Note: if the crash happens again, it will cause creation of a new bug
> report.
> Note: all commands must start from beginning of the line in the email body.
>

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