netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=952/1/0x4000000000000004 softirq=256173/256173 fqs=0 
rcu: 	 (t=10500 jiffies g=333013 q=99)
rcu: rcu_preempt kthread starved for 10500 jiffies! g333013 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29208    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_timeout+0x4cf/0xfe0 kernel/time/timer.c:1825
 rcu_gp_kthread+0xdad/0x21c0 kernel/rcu/tree.c:2202
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
NMI backtrace for cpu 0
CPU: 0 PID: 20981 Comm: syz-executor.3 Not tainted 4.19.139-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682
 update_process_times+0x2a/0xb0 kernel/time/timer.c:1650
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:mrp_mad_event net/802/mrp.c:574 [inline]
RIP: 0010:mrp_join_timer+0x32/0xc0 net/802/mrp.c:594
Code: 48 89 fb e8 f0 f4 9d fb 4c 8d ab 90 00 00 00 4c 8d 63 f0 4c 89 ef e8 2d a2 71 01 48 8d bb 20 01 00 00 e8 c1 1c 6c 01 48 85 c0 <48> 89 c5 74 28 e8 c4 f4 9d fb 48 89 ef 49 89 ee e8 29 3e 6c 01 ba
RSP: 0018:ffff8880ae607ce8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: ffff8880a95b0080 RBX: ffff88809418f790 RCX: ffffffff815255fb
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a95b0090
RBP: 0000000000000101 R08: 0000000000000001 R09: ffffed1012831f04
R10: ffff88809418f823 R11: 0000000000000000 R12: ffff88809418f780
R13: ffff88809418f820 R14: 0000000000000000 R15: 0000000000000000
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1716
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:628 [inline]
RIP: 0010:do_notify_parent_cldstop+0x74d/0xa40 kernel/signal.c:1945
Code: e0 7f 89 44 24 48 e9 74 fe ff ff e8 dd 79 28 00 b9 01 00 00 00 4c 89 e2 4c 89 f6 bf 11 00 00 00 e8 e8 f7 ff ff e9 07 ff ff ff <e8> be 79 28 00 e8 09 36 17 00 31 ff 41 89 c5 89 c6 e8 dd 7a 28 00
RSP: 0018:ffff88821265fae0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000002 RBX: 0000000000000005 RCX: ffffffff81412fd6
RDX: 0000000000000000 RSI: ffff8880103cc180 RDI: 0000000000000001
RBP: ffff888040014540 R08: 00000000ca3e2522 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809b52a440
R13: 0000000000000000 R14: ffff88821265fb10 R15: dffffc0000000000
 do_signal_stop+0x6e8/0x860 kernel/signal.c:2293
 get_signal+0xf17/0x1f70 kernel/signal.c:2463
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45d239
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8c295ddc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 00000000000251c0 RCX: 000000000045d239
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffd0d5af27f R14: 00007f8c295de9c0 R15: 000000000118cf4c