page:ffffea0006821bc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 14547 Comm: syz-executor.2 Tainted: G    B           4.14.152+ #0
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 panic+0x1f1/0x3da kernel/panic.c:183
 end_report+0x43/0x49 mm/kasan/report.c:95
 __kasan_report.cold+0xd/0x41 mm/kasan/report.c:323
 deref_stack_regs arch/x86/kernel/unwind_orc.c:308 [inline]
 unwind_next_frame+0x1757/0x1810 arch/x86/kernel/unwind_orc.c:437
 perf_callchain_kernel+0x3a0/0x540 arch/x86/events/core.c:2338
 get_perf_callchain+0x2f5/0x770 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0x6a8/0x1360 kernel/events/core.c:6148
 __perf_event_output kernel/events/core.c:6264 [inline]
 perf_event_output_forward+0xdc/0x220 kernel/events/core.c:6282
 __perf_event_overflow+0x12d/0x340 kernel/events/core.c:7520
 perf_swevent_hrtimer+0x238/0x390 kernel/events/core.c:8730
 __run_hrtimer kernel/time/hrtimer.c:1259 [inline]
 __hrtimer_run_queues+0x28b/0xc40 kernel/time/hrtimer.c:1323
 hrtimer_interrupt+0x1bd/0x490 kernel/time/hrtimer.c:1357
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x147/0x650 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:796 [inline]
RIP: 0010:lock_acquire+0x69/0x360 kernel/locking/lockdep.c:3989
RSP: 0018:ffff8881a086f480 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff8881d12c8000 RSI: 0000000000000000 RDI: ffff8881d12c882c
RBP: ffffffffa9180020 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8881a086f668 R11: ffff88816bcd60e3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 kernfs_find_and_get_ns+0x21/0x60 fs/kernfs/dir.c:892
 kernfs_find_and_get_ns+0x21/0x60 fs/kernfs/dir.c:892
 retint_kernel+0x2d/0x2d
RIP: 0000:0xffff8881d12c87fc
RSP: aaf4e1a0:ffff8881d9194958 EFLAGS: ffffffffa8600a3a ORIG_RAX: ffffc90003559000
RAX: ffffed103b7444fa RBX: 0000000000000000 RCX: ffff88821ffff01c
RDX: ffff8881a086f5a8 RSI: 1ffffffff51d5684 RDI: 0000000000000000
RBP: ffffffffa6dfd88b R08: ffffed103b7444f9 R09: ffffffffa849a090
R10: ffffffffa8e474d8 R11: 0000000041b58ab3 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000000 R15: 1ffff1103410dea8
Kernel Offset: 0x25c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..