RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000028
RBP: 00007fc550725ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00007ffe93110a7f R14: 00007fc5507269c0 R15: 000000000078bf0c
WARNING: can't dereference registers at 1ffff11015d60f8e for ip apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
kvm_set_msr_common: 700 callbacks suppressed
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x400000000e7
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x400000000bf
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x4000000007a
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x40000000087
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x400000000af
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x400000000a2
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x400000000c3
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x40000000099
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x40000000093
kvm [16211]: vcpu0, guest rIP: 0xcc disabled perfctr wrmsr: 0xc2 data 0x400000000cb
==================================================================
BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:311 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:441
Read of size 8 at addr ffff88808b4afb20 by task syz-executor.4/16282

CPU: 1 PID: 16282 Comm: syz-executor.4 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 deref_stack_regs arch/x86/kernel/unwind_orc.c:311 [inline]
 unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:441
 perf_callchain_kernel+0x38c/0x520 arch/x86/events/core.c:2343
 get_perf_callchain+0x2df/0x740 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0xd77/0x1380 kernel/events/core.c:6162
 __perf_event_output kernel/events/core.c:6278 [inline]
 perf_event_output_forward+0xc9/0x1f0 kernel/events/core.c:6296
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7541
 perf_swevent_overflow kernel/events/core.c:7617 [inline]
 perf_swevent_event+0x3c8/0x460 kernel/events/core.c:7655
 perf_tp_event+0x540/0x6e0 kernel/events/core.c:8079
 perf_trace_run_bpf_submit+0x119/0x200 kernel/events/core.c:8049
 perf_trace_lock+0x2d6/0x490 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x4df/0x870 kernel/locking/lockdep.c:4016
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:184
 spin_unlock include/linux/spinlock.h:357 [inline]
 inode_doinit_with_dentry+0x244/0xe50 security/selinux/hooks.c:1543
 selinux_d_instantiate+0x23/0x30 security/selinux/hooks.c:5937
 security_d_instantiate+0x54/0xd0 security/security.c:1261
 d_instantiate+0x5a/0x90 fs/dcache.c:1876
 __debugfs_create_file+0x197/0x480 fs/debugfs/inode.c:368
 kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:622 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3298 [inline]
 kvm_dev_ioctl+0xe7c/0x1420 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3321
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c369
RSP: 002b:00007fc550725c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000fe80 RCX: 000000000045c369
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe93110a7f R14: 00007fc5507269c0 R15: 000000000078bf0c

The buggy address belongs to the page:
page:ffffea00022d2bc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 0000000100000001 ffff88821ac0d3c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808b4afa00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2
 ffff88808b4afa80: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 f1 f1
>ffff88808b4afb00: f1 f1 04 f3 f3 f3 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff88808b4afb80: 00 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00
 ffff88808b4afc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================