watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [kworker/u4:7:4223]
Modules linked in:
irq event stamp: 1550016
hardirqs last  enabled at (1550015): [<ffff80000fa9f054>] seqcount_lockdep_reader_access+0x1fc/0x2c4 include/linux/seqlock.h:105
hardirqs last disabled at (1550016): [<ffff8000111baf54>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (1547012): [<ffff80000fb18e50>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (1547012): [<ffff80000fb18e50>] __nf_nat_cleanup_conntrack net/netfilter/nf_nat_core.c:801 [inline]
softirqs last  enabled at (1547012): [<ffff80000fb18e50>] nf_nat_cleanup_conntrack+0x134/0x15c net/netfilter/nf_nat_core.c:828
softirqs last disabled at (1547010): [<ffff80000fb18dbc>] spin_lock_bh include/linux/spinlock.h:368 [inline]
softirqs last disabled at (1547010): [<ffff80000fb18dbc>] __nf_nat_cleanup_conntrack net/netfilter/nf_nat_core.c:799 [inline]
softirqs last disabled at (1547010): [<ffff80000fb18dbc>] nf_nat_cleanup_conntrack+0xa0/0x15c net/netfilter/nf_nat_core.c:828
CPU: 1 PID: 4223 Comm: kworker/u4:7 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_power_efficient gc_worker
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : arch_local_irq_restore+0x8/0x10 arch/arm64/include/asm/irqflags.h:131
lr : lock_is_held_type+0x140/0x198 kernel/locking/lockdep.c:5668
sp : ffff800020617920
x29: ffff800020617920 x28: 000000000001c8e5 x27: ffff0000c2188c50
x26: ffff0000d7a79b40 x25: ffff8000140c3d40 x24: ffff8000142115c0
x23: 0000000000000002 x22: ffff0000d7a7a570 x21: ffff800014341420
x20: 0000000000000000 x19: 0000000000000000 x18: 1fffe0003421cd96
x17: ffff800016d04000 x16: ffff8000082bf708 x15: ffff8000167e4500
x14: ffff0000d7a7a540 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a770438
x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000010
x2 : 0000000000000000 x1 : ffff80001131c340 x0 : 0000000000000000
Call trace:
 arch_local_irq_restore+0x8/0x10 arch/arm64/include/asm/irqflags.h:122
 lock_is_held include/linux/lockdep.h:287 [inline]
 ___might_sleep+0x98/0x4d4 kernel/sched/core.c:9605
 gc_worker+0xb70/0x11a4 net/netfilter/nf_conntrack_core.c:1544
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 process_scheduled_works kernel/workqueue.c:2373 [inline]
 worker_thread+0xb64/0x101c kernel/workqueue.c:2459
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855