watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u4:6:4097]
Modules linked in:
irq event stamp: 1663483
hardirqs last  enabled at (1663482): [<ffff80001194e720>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (1663482): [<ffff80001194e720>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (1663483): [<ffff80001194e968>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (1659134): [<ffff800011777b9c>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (1659134): [<ffff800011777b9c>] batadv_nc_purge_paths+0x308/0x38c net/batman-adv/network-coding.c:475
softirqs last disabled at (1659135): [<ffff8000081b5144>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (1659135): [<ffff8000081b5144>] do_softirq+0x120/0x20c kernel/softirq.c:459
CPU: 0 PID: 4097 Comm: kworker/u4:6 Not tainted 5.15.116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: bat_events batadv_nc_worker
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x160/0x938 kernel/locking/qspinlock.c:382
lr : queued_spin_lock_slowpath+0x16c/0x938 kernel/locking/qspinlock.c:382
sp : ffff80001ccb7340
x29: ffff80001ccb73e0 x28: 1ffff00003996e74 x27: 1fffe0001816a21f
x26: dfff800000000000 x25: ffff700003996e6c x24: ffff80001ccb7360
x23: 1fffe0001816a21e x22: ffff80001ccb73a0 x21: 0000000000000001
x20: 0000000000000001 x19: ffff0000c0b510f0 x18: 1fffe000368ff38e
x17: 1fffe000368ff38e x16: ffff80000830309c x15: ffff80001498f100
x14: 1ffff0000291e06a x13: ffffffffffffffff x12: 0000000000000001
x11: 1fffe0001816a21e x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000101 x7 : ffff80001009bd78 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000083023a8
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 queued_spin_lock_slowpath+0x160/0x938 kernel/locking/qspinlock.c:382
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x334/0x35c kernel/locking/spinlock_debug.c:115
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0xb8/0x10c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 fq_pie_timer+0x94/0x248 net/sched/sch_fq_pie.c:380
 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x554/0x718 kernel/time/timer.c:1737
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1750
 __do_softirq+0x344/0xe20 kernel/softirq.c:558
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 do_softirq+0x120/0x20c kernel/softirq.c:459
 __local_bh_enable_ip+0x2c0/0x4d0 kernel/softirq.c:383
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0xf8/0x180 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:408 [inline]
 batadv_nc_purge_paths+0x308/0x38c net/batman-adv/network-coding.c:475
 batadv_nc_worker+0x2e4/0x580 net/batman-adv/network-coding.c:724
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2307
 worker_thread+0x910/0x1034 kernel/workqueue.c:2454
 kthread+0x37c/0x45c kernel/kthread.c:319
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870