9pnet: Insufficient options for proto=fd
9pnet: Insufficient options for proto=fd
INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=93465, c=93464, q=112)
All QSes seen, last rcu_preempt kthread activity 10500 (4295195644-4295185144), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.3  R  running task    27632 27809   6356 0x80000008
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
 check_cpu_stall kernel/rcu/tree.c:1616 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x90 kernel/rcu/update.c:299
RSP: 0018:ffff8880aeb07d48 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffff888056ff6400 RBX: ffff88805e6d2ac0 RCX: 1ffff11015d60f9b
RDX: 0000000000000100 RSI: ffff888056ff6cb0 RDI: 0000000000000001
RBP: ffff88805e6d2000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000c8
R13: ffff88805e6d2ba0 R14: ffff88805e6d2ac0 R15: 0000000000000001
 rcu_read_unlock include/linux/rcupdate.h:681 [inline]
 hsr_announce+0x19a/0x330 net/hsr/hsr_device.c:359
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:pte_lockptr include/linux/mm.h:1739 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1303 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1444 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1473 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1494 [inline]
RIP: 0010:unmap_page_range+0x703/0x1930 mm/memory.c:1515
RSP: 0018:ffff8881f25477d8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 1ffffd4000fb6c86 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffea0007db6430
RBP: ffffea0007db6400 R08: 0000000000000000 R09: ffff8881f25478c8
R10: ffffed103e4a8f1a R11: ffff8881f25478d7 R12: ffffc00000000fff
R13: 00007f8641313000 R14: 00007f8641313000 R15: ffff8881ff7bb048
 unmap_single_vma+0x147/0x2b0 mm/memory.c:1560
 unmap_vmas+0x9d/0x160 mm/memory.c:1590
 exit_mmap+0x26d/0x4b0 mm/mmap.c:3056
 __mmput kernel/fork.c:930 [inline]
 mmput+0x103/0x420 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x933/0x2b00 kernel/exit.c:845
 do_group_exit+0x100/0x310 kernel/exit.c:955
 get_signal+0x385/0x1ca0 kernel/signal.c:2423
 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007f8640911cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000078bf08 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078bf08
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffd1896569f R14: 00007f86409129c0 R15: 000000000078bf0c
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.