rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=466/1/0x4000000000000002 softirq=12503/12504 fqs=5218 
	(t=10500 jiffies g=15365 q=1432)
NMI backtrace for cpu 1
CPU: 1 PID: 9492 Comm: syz-executor.3 Not tainted 5.7.0-rc2-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+0x188/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x19b/0x1e5 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:475 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:549 [inline]
 rcu_pending kernel/rcu/tree.c:3225 [inline]
 rcu_sched_clock_irq.cold+0x55d/0xcfa kernel/rcu/tree.c:2296
 update_process_times+0x25/0x60 kernel/time/timer.c:1727
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x5ca/0xed0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline]
RIP: 0010:lock_acquire+0x267/0x8f0 kernel/locking/lockdep.c:4937
Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c6 05 00 00 48 83 3d d5 3c 3b 08 00 0f 84 65 04 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 08 48 c7
RSP: 0018:ffffc90002126c00 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1329804 RBX: ffff88805b19e2c0 RCX: 1a74e3e68667b7c2
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff185cf55
R10: ffffffff8c2e7aa7 R11: fffffbfff185cf54 R12: 0000000000000000
R13: ffff888061acf158 R14: 0000000000000000 R15: 0000000000000000
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:358 [inline]
 batadv_tt_local_purge_pending_clients+0x11f/0x3b0 net/batman-adv/translation-table.c:3895
 batadv_tt_local_resize_to_mtu+0x96/0x130 net/batman-adv/translation-table.c:4198
 batadv_update_min_mtu net/batman-adv/hard-interface.c:626 [inline]
 batadv_hardif_activate_interface.part.0.cold+0xc6/0x294 net/batman-adv/hard-interface.c:653
 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:800 [inline]
 batadv_hardif_enable_interface+0x9f2/0xaa0 net/batman-adv/hard-interface.c:792
 batadv_softif_slave_add+0x92/0x150 net/batman-adv/soft-interface.c:859
 do_set_master net/core/rtnetlink.c:2470 [inline]
 do_set_master+0x1d7/0x230 net/core/rtnetlink.c:2443
 do_setlink+0xaa2/0x3680 net/core/rtnetlink.c:2605
 __rtnl_newlink+0xad5/0x1590 net/core/rtnetlink.c:3266
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3391
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5454
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362
 ___sys_sendmsg+0x100/0x170 net/socket.c:2416
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c829
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f93e0a8dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000500ce0 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a04 R14: 00000000004ccbcc R15: 00007f93e0a8e6d4