rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10493 ticks this GP) idle=9d9/1/0x4000000000000000 softirq=98302/98304 fqs=5208 
	(t=10500 jiffies g=117945 q=436)
NMI backtrace for cpu 0
CPU: 0 PID: 11866 Comm: syz-executor.5 Tainted: G        W         5.17.0-syzkaller-10748-g2975dbdc3989 #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:1785
 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:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:390
Code: 1d 8d d1 ba 7e 65 8b 05 86 d1 ba 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 d5 58 09 00 e8 10 46 37 00 fb 65 8b 05 68 d1 ba 7e <85> c0 74 58 5b 5d c3 65 8b 05 b6 d8 ba 7e 85 c0 75 a2 0f 0b eb 9e
RSP: 0018:ffffc9000c4e6fd8 EFLAGS: 00000246
RAX: 0000000000000201 RBX: 00000000fffffe00 RCX: 1ffffffff1b6d675
RDX: 0000000000000000 RSI: ffffffff817ee4b1 RDI: ffffffff81479e50
RBP: ffffffff88fb3a45 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817ee498 R11: 0000000000000000 R12: 0000000000000100
R13: ffff88807d6a2d18 R14: 00000000000001ff R15: dffffc0000000000
 spin_unlock_bh include/linux/spinlock.h:394 [inline]
 batadv_tt_local_purge+0x285/0x370 net/batman-adv/translation-table.c:1357
 batadv_tt_local_resize_to_mtu+0x8e/0x130 net/batman-adv/translation-table.c:3957
 batadv_hardif_activate_interface.part.0.cold+0x65/0x1ba 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:5990
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2496
 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+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f696ba89049
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:00007f696cbd7168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f696bb9c030 RCX: 00007f696ba89049
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007f696bae308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff543fd6bf R14: 00007f696cbd7300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	1d 8d d1 ba 7e       	sbb    $0x7ebad18d,%eax
   5:	65 8b 05 86 d1 ba 7e 	mov    %gs:0x7ebad186(%rip),%eax        # 0x7ebad192
   c:	a9 00 ff ff 00       	test   $0xffff00,%eax
  11:	74 45                	je     0x58
  13:	bf 01 00 00 00       	mov    $0x1,%edi
  18:	e8 d5 58 09 00       	callq  0x958f2
  1d:	e8 10 46 37 00       	callq  0x374632
  22:	fb                   	sti
  23:	65 8b 05 68 d1 ba 7e 	mov    %gs:0x7ebad168(%rip),%eax        # 0x7ebad192
* 2a:	85 c0                	test   %eax,%eax <-- trapping instruction
  2c:	74 58                	je     0x86
  2e:	5b                   	pop    %rbx
  2f:	5d                   	pop    %rbp
  30:	c3                   	retq
  31:	65 8b 05 b6 d8 ba 7e 	mov    %gs:0x7ebad8b6(%rip),%eax        # 0x7ebad8ee
  38:	85 c0                	test   %eax,%eax
  3a:	75 a2                	jne    0xffffffde
  3c:	0f 0b                	ud2
  3e:	eb 9e                	jmp    0xffffffde