rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10492 ticks this GP) idle=275/1/0x4000000000000000 softirq=6470/6470 fqs=5247 
	(t=10501 jiffies g=5705 q=2721)
NMI backtrace for cpu 1
CPU: 1 PID: 3951 Comm: syz-executor.5 Not tainted 5.18.0-rc7-syzkaller-00136-g3b5e1590a267 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x262/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:639 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:723 [inline]
 rcu_pending kernel/rcu/tree.c:3923 [inline]
 rcu_sched_clock_irq.cold+0xa1/0x8d6 kernel/rcu/tree.c:2625
 update_process_times+0x16d/0x200 kernel/time/timer.c:1788
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
 tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0xed/0x510 kernel/locking/lockdep.c:5614
Code: 5b 0c 0f 82 64 03 00 00 48 c7 c0 ac 5e b9 8d 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 <38> d0 7c 08 84 d2 0f 85 b1 03 00 00 8b 0d 6d aa 5b 0c 85 c9 0f 84
RSP: 0018:ffffc90004d7ef08 EFLAGS: 00000202
RAX: 0000000000000007 RBX: 1ffff920009afde3 RCX: 1ffffffff1b72bd5
RDX: 0000000000000000 RSI: 0000000000000403 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8db92ad7
R10: fffffbfff1b7255a R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888041166858 R15: 0000000000000000
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:354 [inline]
 batadv_tt_local_purge_pending_clients+0x112/0x4d0 net/batman-adv/translation-table.c:3655
 batadv_tt_local_resize_to_mtu+0x96/0x130 net/batman-adv/translation-table.c:3958
 batadv_hardif_activate_interface.part.0.cold+0x14c/0x1ba net/batman-adv/hard-interface.c:662
 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:753 [inline]
 batadv_hardif_enable_interface+0xaba/0xac0 net/batman-adv/hard-interface.c:745
 batadv_softif_slave_add+0x64/0x130 net/batman-adv/soft-interface.c:839
 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2534
 __rtnl_newlink+0x13b3/0x1760 net/core/rtnetlink.c:3500
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3531
 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5993
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:725
 ____sys_sendmsg+0x6e2/0x800 net/socket.c:2413
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2496
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd78ea890e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd78fccf168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd78eb9bf60 RCX: 00007fd78ea890e9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007fd78eae308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe9575accf R14: 00007fd78fccf300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	0f 82 64 03 00 00    	jb     0x36a
   6:	48 c7 c0 ac 5e b9 8d 	mov    $0xffffffff8db95eac,%rax
   d:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  14:	fc ff df
  17:	48 89 c1             	mov    %rax,%rcx
  1a:	83 e0 07             	and    $0x7,%eax
  1d:	48 c1 e9 03          	shr    $0x3,%rcx
  21:	83 c0 03             	add    $0x3,%eax
  24:	0f b6 14 11          	movzbl (%rcx,%rdx,1),%edx
* 28:	38 d0                	cmp    %dl,%al <-- trapping instruction
  2a:	7c 08                	jl     0x34
  2c:	84 d2                	test   %dl,%dl
  2e:	0f 85 b1 03 00 00    	jne    0x3e5
  34:	8b 0d 6d aa 5b 0c    	mov    0xc5baa6d(%rip),%ecx        # 0xc5baaa7
  3a:	85 c9                	test   %ecx,%ecx
  3c:	0f                   	.byte 0xf
  3d:	84                   	.byte 0x84