netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'.
IPVS: ftp: loaded support on port[0] = 21
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=73a/1/0x4000000000000004 softirq=397891/397892 fqs=35 
rcu: 	 (t=10500 jiffies g=361821 q=1852)
NMI backtrace for cpu 1
CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 4.19.93-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+0x197/0x210 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x189/0x1d5 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+0x5e3/0xd90 kernel/rcu/tree.c:2682
 update_process_times+0x32/0x80 kernel/time/timer.c:1638
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:preempt_count_sub+0x67/0x160 kernel/sched/core.c:3272
Code: 75 18 65 8b 05 ba dd b8 7e 25 ff ff ff 7f 39 c3 7f 1b 81 fb fe 00 00 00 76 6b 65 8b 05 a2 dd b8 7e f7 db 65 01 1d 99 dd b8 7e <5b> 5d c3 e8 81 38 1d 02 85 c0 74 f4 48 c7 c0 00 4c dc 8a 48 ba 00
RSP: 0018:ffff8880ae907c88 EFLAGS: 00000213 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000102 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff836649b3 RDI: 0000000000000001
RBP: ffff8880ae907c90 R08: ffff888094e36680 R09: ffff888094e36f48
R10: 0000000000000000 R11: 0000000000000000 R12: 000000005539fc2b
R13: ffff888095533d00 R14: 1ffff11015d20fa6 R15: 0000000000000000
 prandom_u32+0x64/0xb0 lib/random32.c:85
 mrp_join_timer_arm+0x26/0x80 net/802/mrp.c:585
 mrp_join_timer+0x79/0x80 net/802/mrp.c:599
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1684 [inline]
 __run_timers kernel/time/timer.c:1652 [inline]
 run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:write_comp_data+0x68/0x70 kernel/kcov.c:146
Code: 00 00 4e 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 <c3> 0f 1f 80 00 00 00 00 55 40 0f b6 d6 40 0f b6 f7 31 ff 48 89 e5
RSP: 0018:ffff8880596376b0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffff888059637948 RCX: ffffffff81953e7d
RDX: 0000000000001000 RSI: 0000000000001000 RDI: 0000000000000004
RBP: ffff8880596376b8 R08: ffff888094e36680 R09: fffff940004c143f
R10: fffff940004c143e R11: ffffea000260a1f3 R12: 0000000000001000
R13: 0000000000001000 R14: ffffea000260a1c0 R15: ffffea000260a1c0
 __tlb_remove_page_size+0x9d/0x500 mm/memory.c:297
 __tlb_remove_page include/asm-generic/tlb.h:161 [inline]
 zap_pte_range mm/memory.c:1341 [inline]
 zap_pmd_range mm/memory.c:1440 [inline]
 zap_pud_range mm/memory.c:1469 [inline]
 zap_p4d_range mm/memory.c:1490 [inline]
 unmap_page_range+0xf0e/0x1fb0 mm/memory.c:1511
 unmap_single_vma+0x19d/0x300 mm/memory.c:1556
 unmap_vmas+0xae/0x180 mm/memory.c:1586
 exit_mmap+0x2c2/0x530 mm/mmap.c:3097
 __mmput kernel/fork.c:1005 [inline]
 mmput+0x15f/0x4c0 kernel/fork.c:1026
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0x899/0x3080 kernel/exit.c:863
 do_group_exit+0x135/0x370 kernel/exit.c:979
 get_signal+0x3ec/0x1fc0 kernel/signal.c:2578
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 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+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
Code: Bad RIP value.
RSP: 002b:00007f6a07cc5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000075bf28 RCX: 000000000045af49
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00007ffcb0f5ea8f R14: 00007f6a07cc69c0 R15: 000000000075bf2c