watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [udevd:5590] Modules linked in: irq event stamp: 3089387 hardirqs last enabled at (3089386): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (3089386): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (3089387): [] __el1_irq arch/arm64/kernel/entry-common.c:470 [inline] hardirqs last disabled at (3089387): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (3084718): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (3085067): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 CPU: 0 PID: 5590 Comm: udevd Not tainted 6.4.0-rc5-syzkaller-gd8b213732169 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_del_entry_valid+0xac/0x158 lib/list_debug.c:62 lr : __list_del_entry include/linux/list.h:134 [inline] lr : list_move_tail include/linux/list.h:229 [inline] lr : fq_pie_qdisc_dequeue+0x288/0x8ac net/sched/sch_fq_pie.c:248 sp : ffff8000800071e0 x29: ffff8000800071e0 x28: ffff00012ad306d0 x27: ffff000129d472e8 x26: ffff000129d472f0 x25: dfff800000000000 x24: ffff000129d472e0 x23: ffff00012ad306c0 x22: dfff800000000000 x21: ffff000129d472e8 x20: ffff000129d472e0 x19: ffff00012ad306d0 x18: ffff800080006e40 x17: 0000000000000000 x16: ffff80008050c56c x15: 0000000000000302 x14: 0000000000000100 x13: 0000000000000000 x12: 0000000000000001 x11: 0000000000000302 x10: 0000000000000100 x9 : ffff000129d47328 x8 : 0000000000000000 x7 : ffff80008041c668 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff00012ad306d0 x1 : 0000000000000000 x0 : ffff00012ad306d8 Call trace: __list_del_entry_valid+0xac/0x158 lib/list_debug.c:62 __list_del_entry include/linux/list.h:134 [inline] list_move_tail include/linux/list.h:229 [inline] fq_pie_qdisc_dequeue+0x288/0x8ac net/sched/sch_fq_pie.c:248 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1fc/0x231c net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3868 [inline] __dev_queue_xmit+0xc80/0x3318 net/core/dev.c:4210 dev_queue_xmit include/linux/netdevice.h:3085 [inline] neigh_connected_output+0x2f8/0x38c net/core/neighbour.c:1581 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] console_emit_next_record kernel/printk/printk.c:2884 [inline] console_flush_all+0x670/0xb54 kernel/printk/printk.c:2933 console_unlock+0x148/0x274 kernel/printk/printk.c:3007 vprintk_emit+0x14c/0x2e4 kernel/printk/printk.c:2307 vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2318 vprintk+0x218/0x2f0 kernel/printk/printk_safe.c:50 _printk+0xdc/0x128 kernel/printk/printk.c:2328 check_partition block/partitions/core.c:165 [inline] blk_add_partitions block/partitions/core.c:594 [inline] bdev_disk_changed+0xe1c/0x116c block/partitions/core.c:680 blkdev_get_whole+0x2a4/0x354 block/bdev.c:619 blkdev_get_by_dev+0x390/0x8f8 block/bdev.c:756 disk_scan_partitions+0x1b0/0x2dc block/genhd.c:379 blkdev_common_ioctl+0x14a4/0x26b4 block/ioctl.c:531 blkdev_ioctl+0x380/0xb40 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __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