watchdog: BUG: soft lockup - CPU#1 stuck for 27s! [kworker/u8:4:163] Modules linked in: irq event stamp: 245667 hardirqs last enabled at (245666): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (245666): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (245667): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (245667): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (240564): [] neigh_hh_init net/core/neighbour.c:1538 [inline] softirqs last enabled at (240564): [] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 softirqs last disabled at (240568): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 PID: 163 Comm: kworker/u8:4 Not tainted 6.9.0-rc7-syzkaller-00077-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: ipv6_addrconf addrconf_dad_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_del_entry include/linux/list.h:218 [inline] pc : list_move_tail include/linux/list.h:310 [inline] pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] pc : ieee80211_tx_dequeue+0x690/0x3b4c net/mac80211/tx.c:3854 lr : __list_del_entry include/linux/list.h:218 [inline] lr : list_move_tail include/linux/list.h:310 [inline] lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 sp : ffff800097ab66a0 x29: ffff800097ab6a00 x28: ffff800097ab6900 x27: dfff800000000000 x26: ffff0000c93d2d50 x25: ffff0000c93d2be0 x24: ffff0000c93d2bf0 x23: ffff0000e3f5cee8 x22: ffff0000e3f5cf54 x21: ffff0000c93d2bf8 x20: 00000000ffffffff x19: 00000000db397ace x18: 1fffe000367bd196 x17: 0000000000000000 x16: ffff8000805519dc x15: ffff700012f56cbc x14: 1ffff00012f56cbc x13: 0000000000000004 x12: ffffffffffffffff x11: ffff700012f56cbc x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff80008a752da0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008034c7fc x2 : ffff0000e3f5cee8 x1 : 00000000db397ace x0 : ffff0000e3f5cef0 Call trace: __list_del_entry include/linux/list.h:218 [inline] list_move_tail include/linux/list.h:310 [inline] fq_tin_dequeue include/net/fq_impl.h:112 [inline] ieee80211_tx_dequeue+0x690/0x3b4c net/mac80211/tx.c:3854 wake_tx_push_queue net/mac80211/util.c:294 [inline] ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 dev_queue_xmit include/linux/netdevice.h:3091 [inline] neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xaa8/0x14f0 net/ipv6/ndisc.c:509 ndisc_send_ns+0xd4/0x164 net/ipv6/ndisc.c:667 addrconf_dad_work+0x988/0x1350 net/ipv6/addrconf.c:4280 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:3429 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 42 Comm: kworker/u8:3 Not tainted 6.9.0-rc7-syzkaller-00077-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events_unbound cfg80211_wiphy_work pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : lock_acquire+0x284/0x73c lr : lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] lr : lock_acquire+0x254/0x73c kernel/locking/lockdep.c:5756 sp : ffff8000952b7700 x29: ffff8000952b7800 x28: dfff800000000000 x27: ffff700012a56eec x26: ffff0001b3dc4dc0 x25: ffff0000c93d1a28 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80008ee01dc0 x19: ffff0001b3dc4dc0 x18: 1fffe000367b8996 x17: ffff80008eead000 x16: ffff80008ae89f60 x15: 0000000000000001 x14: ffff80008eeb0668 x13: dfff800000000000 x12: 00000000e046965f x11: 00000000cdd355df x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff80008a6ca70c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000008 x1 : ffff80008b000c80 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] lock_acquire+0x284/0x73c kernel/locking/lockdep.c:5757 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x48/0x60 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] ieee80211_ibss_work+0xd0/0x11f0 net/mac80211/ibss.c:1652 ieee80211_iface_work+0xbd0/0xc80 net/mac80211/iface.c:1681 cfg80211_wiphy_work+0x1fc/0x240 net/wireless/core.c:437 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:3429 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860