watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [kworker/1:8:4178]
Modules linked in:
irq event stamp: 16183
hardirqs last  enabled at (16182): [<ffff8000083782e0>] __call_rcu kernel/rcu/tree.c:3041 [inline]
hardirqs last  enabled at (16182): [<ffff8000083782e0>] call_rcu+0x644/0xb40 kernel/rcu/tree.c:3087
hardirqs last disabled at (16183): [<ffff800011b59384>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (15532): [<ffff800010bd138c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (15534): [<ffff800010a67f5c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
CPU: 1 PID: 4178 Comm: kworker/1:8 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: ipv6_addrconf addrconf_dad_work
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x410/0x938 kernel/locking/qspinlock.c:511
lr : queued_spin_lock_slowpath+0x41c/0x938 kernel/locking/qspinlock.c:511
sp : ffff800020856fe0
x29: ffff800020857080 x28: 1ffff0000410ae08 x27: 0000000000000000
x26: dfff800000000000 x25: ffff70000410ae00 x24: 0000000000080000
x23: 0000000000000000 x22: 0000000000080100 x21: ffff0001b41a8700
x20: 1fffe000368350e0 x19: ffff0000d1e7c0f0 x18: 0000000000000200
x17: 0000000000000000 x16: ffff800011b5ac80 x15: 0000000000000004
x14: 1ffff0000296e06c x13: dfff800000000000 x12: 0000000000000001
x11: 1fffe0001a3cf81e x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000080100 x7 : ffff80000ff8bea8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008304fa4
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+0x410/0x938 kernel/locking/qspinlock.c:511
 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]
 __dev_xmit_skb net/core/dev.c:3910 [inline]
 __dev_queue_xmit+0x8a0/0x2ac8 net/core/dev.c:4252
 dev_queue_xmit+0x24/0x34 net/core/dev.c:4320
 neigh_resolve_output+0x52c/0x5dc net/core/neighbour.c:1504
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0x1360/0x1cec net/ipv6/ip6_output.c:130
 __ip6_finish_output+0x580/0x6ec net/ipv6/ip6_output.c:201
 ip6_finish_output+0x40/0x218 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x274/0x594 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:452 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xc94/0x18a8 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x49c/0x604 net/ipv6/ndisc.c:707
 addrconf_dad_completed+0x5f8/0xb70 net/ipv6/addrconf.c:4278
 addrconf_dad_work+0xa6c/0x12f4
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870