netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
xt_policy: output policy not valid in PREROUTING and INPUT
xt_policy: output policy not valid in PREROUTING and INPUT
block nbd4: shutting down sockets
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	1-....: (1 GPs behind) idle=18e/1/0x4000000000000004 softirq=348014/348015 fqs=5243 
rcu: 	(detected by 0, t=10502 jiffies, g=29045, q=27)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11799 Comm: syz-executor.1 Not tainted 4.19.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hlist_add_head include/linux/list.h:701 [inline]
RIP: 0010:enqueue_timer kernel/time/timer.c:538 [inline]
RIP: 0010:__internal_add_timer kernel/time/timer.c:549 [inline]
RIP: 0010:internal_add_timer+0x89/0x1d0 kernel/time/timer.c:599
Code: 7d 10 e8 ba 6f ff ff 41 89 c7 48 b8 00 00 00 00 00 fc ff df 4f 8d ac fc 98 00 00 00 4c 89 fb 4c 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 0c 01 00 00 48 89 ea 4d 8b 75 00 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffff8880ae707bf0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000035 RCX: ffffffff815a2952
RDX: 1ffff11015ce4790 RSI: ffffffff815a296a RDI: 0000000000000007
RBP: ffff8880a3f347d0 R08: 0000000000000000 R09: 000000000000003e
R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880ae723a40
R13: ffff8880ae723c80 R14: 0000000000000000 R15: 0000000000000035
FS:  00007f266c91c700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000744138 CR3: 0000000008c6d000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __mod_timer kernel/time/timer.c:1067 [inline]
 mod_timer+0x4d6/0x1010 kernel/time/timer.c:1114
 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:zap_pte_range mm/memory.c:1323 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1440 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1469 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1490 [inline]
RIP: 0010:unmap_page_range+0xfc9/0x2a70 mm/memory.c:1511
Code: d6 ff 48 8b 7c 24 20 4c 89 e2 b9 01 00 00 00 49 8d b7 00 f0 ff ff e8 86 e6 ff ff 48 83 7c 24 60 00 49 89 c5 0f 85 9c 09 00 00 <e8> 12 aa d6 ff 48 8b 44 24 18 48 8d 78 20 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffff88804b557768 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffea0002411740 RBX: 8000000000000007 RCX: ffffffff8192ef3c
RDX: 0000000000000000 RSI: ffffffff8192ee92 RDI: 0000000000000006
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000021ffff
R10: 0000000000000006 R11: 0000000000000000 R12: 800000009045d007
R13: ffffea0002411740 R14: dffffc0000000000 R15: 00007f266d4ff000
 unmap_single_vma+0x198/0x300 mm/memory.c:1556
 unmap_vmas+0xa9/0x180 mm/memory.c:1586
 exit_mmap+0x2b9/0x530 mm/mmap.c:3091
 __mmput kernel/fork.c:1015 [inline]
 mmput+0x14e/0x4a0 kernel/fork.c:1036
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0xab5/0x2b70 kernel/exit.c:874
 do_group_exit+0x125/0x310 kernel/exit.c:990
 get_signal+0x3f2/0x1f70 kernel/signal.c:2588
 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: 0033:0x45d579
Code: Bad RIP value.
RSP: 002b:00007f266c91bcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000118cf48 RCX: 000000000045d579
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf48
RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fff37e943ef R14: 00007f266c91c9c0 R15: 000000000118cf4c
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=455725, q=7903)
rcu: All QSes seen, last rcu_preempt kthread activity 1 (4295213043-4295213042), jiffies_till_next_fqs=1, root ->qsmask 0x0
kworker/u4:4    R  running task    25536 11094      2 0x80000008
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <IRQ>
 sched_show_task.cold+0x332/0x396 kernel/sched/core.c:5341
 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline]
 check_cpu_stall kernel/rcu/tree.c:1557 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0xb37/0xe19 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
 </IRQ>
RIP: 0010:current_gfp_context include/linux/sched/mm.h:185 [inline]
RIP: 0010:__need_fs_reclaim mm/page_alloc.c:3731 [inline]
RIP: 0010:fs_reclaim_release+0x22/0x110 mm/page_alloc.c:3770
Code: 31 c0 c3 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 65 48 8b 2c 25 40 ee 01 00 53 89 fb 48 8d 7d 24 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b2
RSP: 0018:ffff88803d6b7aa0 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 0000000000480020 RCX: ffffffff85b3152b
RDX: 1ffff11008067464 RSI: 0000000000480020 RDI: ffff88804033a324
RBP: ffff88804033a300 R08: ffff8880ae62afe8 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000480020
R13: ffff88821b685e40 R14: 0000000000000293 R15: 0000000000000200
 slab_pre_alloc_hook mm/slab.h:420 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 kmem_cache_alloc+0x28/0x370 mm/slab.c:3557
 __build_skb+0x39/0x300 net/core/skbuff.c:281
 __netdev_alloc_skb+0x2a7/0x460 net/core/skbuff.c:426
 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2683 [inline]
 netdev_alloc_skb_ip_align include/linux/skbuff.h:2693 [inline]
 batadv_iv_ogm_aggregate_new+0x106/0x4d0 net/batman-adv/bat_iv_ogm.c:743
 batadv_iv_ogm_queue_add net/batman-adv/bat_iv_ogm.c:855 [inline]
 batadv_iv_ogm_schedule_buff+0xeb2/0x1340 net/batman-adv/bat_iv_ogm.c:1030
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1050 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1043 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x5e0/0x7a0 net/batman-adv/bat_iv_ogm.c:1869
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415