watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [udevd:5594] Modules linked in: irq event stamp: 5145119 hardirqs last enabled at (5145118): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (5145118): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (5145119): [] __el1_irq arch/arm64/kernel/entry-common.c:470 [inline] hardirqs last disabled at (5145119): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (5138054): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (5140621): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 CPU: 1 PID: 5594 Comm: udevd Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : netdev_get_prio_tc_map include/linux/netdevice.h:2443 [inline] pc : find_entry_to_transmit+0xb0/0x6d0 net/sched/sch_taprio.c:331 lr : find_entry_to_transmit+0x50/0x6d0 net/sched/sch_taprio.c:321 sp : ffff800080017000 x29: ffff8000800170c0 x28: 046acc15ca99f4dd x27: ffff800080017230 x26: 0000000000000000 x25: ffff800080017210 x24: ffff0000d61a6000 x23: ffff0000d61a6b8a x22: ffff0000d6ddc500 x21: ffff0000cc867000 x20: dfff800000000000 x19: ffff0000d64e2c00 x18: dfff800000000000 x17: 0000000000000000 x16: ffff80008050b28c x15: 0000000000000101 x14: 1ffff00011bde0ac x13: ffffffff80000040 x12: 0000000080000040 x11: 0000000000000302 x10: 0000000000000100 x9 : 0000000000000002 x8 : 0000000000000000 x7 : 0000000000000000 x6 : ffff800080017210 x5 : ffff800080017230 x4 : 046acc15ca99f4dd x3 : 0000000000000000 x2 : ffff0000d64e2c00 x1 : ffff0000cc867000 x0 : ffff0000d6ddc500 Call trace: netdev_get_prio_tc_map include/linux/netdevice.h:2443 [inline] find_entry_to_transmit+0xb0/0x6d0 net/sched/sch_taprio.c:331 get_packet_txtime net/sched/sch_taprio.c:505 [inline] taprio_enqueue_one+0xdb0/0x146c net/sched/sch_taprio.c:574 taprio_enqueue+0x328/0x544 net/sched/sch_taprio.c:655 dev_qdisc_enqueue+0x60/0x35c net/core/dev.c:3773 __dev_xmit_skb net/core/dev.c:3862 [inline] __dev_queue_xmit+0xb24/0x3318 net/core/dev.c:4210 dev_queue_xmit include/linux/netdevice.h:3088 [inline] neigh_resolve_output+0x518/0x618 net/core/neighbour.c:1552 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xd60/0x1a1c net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x538/0x8c8 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ndisc_send_skb+0xc30/0x1790 net/ipv6/ndisc.c:508 ndisc_send_rs+0x47c/0x5d4 net/ipv6/ndisc.c:718 addrconf_rs_timer+0x300/0x58c net/ipv6/addrconf.c:3936 call_timer_fn+0x19c/0x8cc kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x55c/0x734 kernel/time/timer.c:2022 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2035 __do_softirq+0x2d0/0xd54 kernel/softirq.c:571 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:882 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:650 irq_exit_rcu+0x14/0x84 kernel/softirq.c:662 __el1_irq arch/arm64/kernel/entry-common.c:474 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:488 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:493 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:587 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:182 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:202 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 __debug_check_no_obj_freed lib/debugobjects.c:1033 [inline] debug_check_no_obj_freed+0x50c/0x528 lib/debugobjects.c:1054 slab_free_hook mm/slub.c:1756 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3786 [inline] kmem_cache_free+0x288/0x56c mm/slub.c:3808 putname+0x108/0x160 fs/namei.c:273 vfs_fstatat fs/stat.c:277 [inline] __do_sys_newfstatat fs/stat.c:446 [inline] __se_sys_newfstatat fs/stat.c:440 [inline] __arm64_sys_newfstatat+0x138/0x1b4 fs/stat.c:440 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591