watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:12:8457] Modules linked in: irq event stamp: 241453 hardirqs last enabled at (241452): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (241452): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (241453): [] __el1_irq arch/arm64/kernel/entry-common.c:470 [inline] hardirqs last disabled at (241453): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (236630): [] neigh_hh_init net/core/neighbour.c:1527 [inline] softirqs last enabled at (236630): [] neigh_resolve_output+0x25c/0x618 net/core/neighbour.c:1542 softirqs last disabled at (236634): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 PID: 8457 Comm: kworker/1:12 Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: mld mld_ifc_work pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_kcov_mode kernel/kcov.c:175 [inline] pc : __sanitizer_cov_trace_pc+0x44/0x7c kernel/kcov.c:207 lr : find_entry_to_transmit+0x624/0x6d0 net/sched/sch_taprio.c:345 sp : ffff800099176530 x29: ffff800099176600 x28: 05248185edbf3cb5 x27: ffff0000d033cd10 x26: ffff0000d033c800 x25: 0000000000000000 x24: 0000000000000080 x23: 052481866dbf3c00 x22: 052481866dbf3c00 x21: ffff800099176750 x20: dfff800000000000 x19: 7fffffffffffffff x18: ffff800092e4e080 x17: 0000000000020010 x16: ffff80008050b28c x15: 0000000000000200 x14: 1ffff00011bde0ac x13: ffffffff80000040 x12: 0000000080000040 x11: 0000000000000401 x10: 0000000000000000 x9 : 0000000000000000 x8 : ffff0001296ad340 x7 : 0000000000000000 x6 : ffff800099176750 x5 : ffff800099176770 x4 : 05248185edbf3cb5 x3 : ffff80008898bde8 x2 : 0000000000000000 x1 : 7fffffffffffffff x0 : 052481866dbf3c41 Call trace: check_kcov_mode kernel/kcov.c:173 [inline] __sanitizer_cov_trace_pc+0x44/0x7c kernel/kcov.c:207 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] br_dev_queue_push_xmit+0x570/0x70c net/bridge/br_forward.c:53 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:303 br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66 NF_HOOK+0x35c/0x408 include/linux/netfilter.h:303 __br_forward+0x2ec/0x44c net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver+0xc8/0x160 net/bridge/br_forward.c:189 br_flood+0x2d0/0x420 net/bridge/br_forward.c:233 br_dev_xmit+0xe68/0x14ec __netdev_start_xmit include/linux/netdevice.h:4918 [inline] netdev_start_xmit include/linux/netdevice.h:4932 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x240/0x8ac net/core/dev.c:3594 __dev_queue_xmit+0x167c/0x3318 net/core/dev.c:4244 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+0x160/0x4f0 include/linux/netfilter.h:303 mld_sendpack+0x904/0x1358 net/ipv6/mcast.c:1820 mld_send_cr net/ipv6/mcast.c:2121 [inline] mld_ifc_work+0x848/0xc20 net/ipv6/mcast.c:2653 process_one_work+0x788/0x12d4 kernel/workqueue.c:2405 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2552 kthread+0x288/0x310 kernel/kthread.c:379 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853