watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [gfs2_quotad:6290]
Modules linked in:
irq event stamp: 1128041
hardirqs last  enabled at (1128040): [<ffff8000083c750c>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (1128040): [<ffff8000083c750c>] timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
hardirqs last  enabled at (1128040): [<ffff8000083c750c>] timekeeping_get_ns+0x120/0x3b8 kernel/time/timekeeping.c:388
hardirqs last disabled at (1128041): [<ffff800011b8c3ac>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (1128041): [<ffff800011b8c3ac>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (0): [<ffff80000818be70>] copy_process+0x1370/0x38f4 kernel/fork.c:2303
softirqs last disabled at (81): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
CPU: 0 PID: 6290 Comm: gfs2_quotad Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : cake_heap_get_backlog net/sched/sch_cake.c:1469 [inline]
pc : cake_heapify+0xd8/0x464 net/sched/sch_cake.c:1475
lr : cake_heapify+0x58/0x464 net/sched/sch_cake.c:1478
sp : ffff800008007110
x29: ffff800008007120 x28: 0000000000000000 x27: ffff0000e9b08000
x26: ffff0000e9b082d8 x25: dfff800000000000 x24: 1fffe0001d36105a
x23: ffff0000e9b0c2d8 x22: 00000000000006cb x21: ffff0000e9a60dd4
x20: ffff0000e9b082d0 x19: 00000000000006cb x18: 1fffe00033e7277e
x17: 0000000000000000 x16: ffff8000082dd248 x15: ffff8000184cd000
x14: 0000000000000001 x13: 1ffff00002a70071 x12: 00000000de747133
x11: ff0080001019a518 x10: 00000000000198d0 x9 : 0000000000000007
x8 : 0000000000000000 x7 : ffff8000083c791c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000002 x1 : 00000000000006cb x0 : 0000000000002000
Call trace:
 cake_heap_get_backlog net/sched/sch_cake.c:1469 [inline]
 cake_heapify+0xd8/0x464 net/sched/sch_cake.c:1475
 cake_drop net/sched/sch_cake.c:1572 [inline]
 cake_enqueue+0x357c/0x6960 net/sched/sch_cake.c:1946
 qdisc_enqueue include/net/sch_generic.h:854 [inline]
 netem_dequeue+0xa00/0x1018 net/sched/sch_netem.c:736
 dequeue_skb net/sched/sch_generic.c:295 [inline]
 qdisc_restart net/sched/sch_generic.c:400 [inline]
 __qdisc_run+0x1b4/0x1300 net/sched/sch_generic.c:418
 __dev_xmit_skb net/core/dev.c:3995 [inline]
 __dev_queue_xmit+0xc38/0x3154 net/core/dev.c:4337
 dev_queue_xmit include/linux/netdevice.h:3051 [inline]
 tipc_l2_send_msg+0x2a0/0x364 net/tipc/bearer.c:519
 tipc_bearer_xmit_skb+0x240/0x380 net/tipc/bearer.c:578
 tipc_disc_timeout+0x4e8/0x630 net/tipc/discover.c:338
 call_timer_fn+0x1b8/0x96c kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x478/0x6d8 kernel/time/timer.c:2023
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2036
 handle_softirqs+0x318/0xc90 kernel/softirq.c:596
 __do_softirq+0x14/0x20 kernel/softirq.c:630
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:897
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 invoke_softirq kernel/softirq.c:477 [inline]
 __irq_exit_rcu+0x23c/0x430 kernel/softirq.c:679
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:691
 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
 el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 finish_wait+0x180/0x1ac kernel/sched/wait.c:412
 gfs2_quotad+0x3c4/0x520 fs/gfs2/quota.c:1579
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850