watchdog: BUG: soft lockup - CPU#0 stuck for 103s! [kworker/u4:2:27]
Modules linked in:
irq event stamp: 1068869
hardirqs last  enabled at (1068867): [<ffffffff8141997f>] __local_bh_enable_ip+0x11f/0x220 kernel/softirq.c:389
hardirqs last disabled at (1068869): [<ffffffff8773680b>] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1100
softirqs last  enabled at (1068866): [<ffffffff873015bb>] spin_unlock_bh include/linux/spinlock.h:399 [inline]
softirqs last  enabled at (1068866): [<ffffffff873015bb>] __batadv_dat_purge.part.0+0x20b/0x330 net/batman-adv/distributed-arp-table.c:184
softirqs last disabled at (1068868): [<ffffffff8730149d>] spin_lock_bh include/linux/spinlock.h:359 [inline]
softirqs last disabled at (1068868): [<ffffffff8730149d>] __batadv_dat_purge.part.0+0xed/0x330 net/batman-adv/distributed-arp-table.c:172
CPU: 0 PID: 27 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_dat_purge
RIP: 0010:arch_local_irq_enable+0x2c/0x40 arch/x86/include/asm/paravirt.h:694
Code: c0 80 41 37 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 14 48 83 3d 9d d3 e3 07 00 74 08 fb 66 0f 1f 44 00 00 <c3> 0f 0b 48 c7 c7 80 41 37 89 e8 d5 e4 51 00 eb de 0f 1f 00 48 b8
RSP: 0018:ffffc900001d7b78 EFLAGS: 00000282
RAX: 1ffffffff126e830 RBX: 0000000000000003 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff87cb4900 RDI: ffffffff88132660
RBP: ffffffff894c8300 R08: 0000000000000000 R09: ffffffff8a441017
R10: fffffbfff1488202 R11: 0000000000000001 R12: ffff888100b181c0
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff888100b18bb0
FS:  0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c0ec3c06c CR3: 0000000124c18001 CR4: 00000000001706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 arch_local_irq_restore arch/x86/include/asm/irqflags.h:140 [inline]
 lock_is_held_type+0xfa/0x130 kernel/locking/lockdep.c:5557
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x3a/0xb0 kernel/rcu/update.c:125
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x60e/0x7e0 kernel/locking/lockdep.c:5523
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:174 [inline]
 _raw_spin_unlock_bh+0x12/0x30 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 __batadv_dat_purge.part.0+0x20b/0x330 net/batman-adv/distributed-arp-table.c:184
 __batadv_dat_purge net/batman-adv/distributed-arp-table.c:165 [inline]
 batadv_dat_purge+0x3d/0x50 net/batman-adv/distributed-arp-table.c:203
 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275
 worker_thread+0x598/0xf80 kernel/workqueue.c:2421
 kthread+0x36f/0x450 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294