watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:7077] Modules linked in: irq event stamp: 5615 hardirqs last enabled at (5614): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (5614): [] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (5615): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (1156): [] spin_unlock_bh include/linux/spinlock.h:408 [inline] softirqs last enabled at (1156): [] netif_addr_unlock_bh include/linux/netdevice.h:4617 [inline] softirqs last enabled at (1156): [] __dev_mc_add net/core/dev_addr_lists.c:837 [inline] softirqs last enabled at (1156): [] dev_mc_add+0xc4/0x110 net/core/dev_addr_lists.c:850 softirqs last disabled at (1215): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (1215): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (1215): [] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 CPU: 0 PID: 7077 Comm: syz-executor.1 Not tainted 5.15.115-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __sanitizer_cov_trace_pc+0x2c/0xa4 kernel/kcov.c:193 lr : fq_pie_qdisc_dequeue+0xe4/0x874 net/sched/sch_fq_pie.c:240 sp : ffff800008007120 x29: ffff8000080071a0 x28: ffff000127648fd0 x27: 1fffe00024ec91f8 x26: dfff800000000000 x25: ffff0000d6556ae8 x24: ffff0000d6556af0 x23: ffff000127648fc0 x22: ffff0000d6556ae0 x21: ffff0000d6556ae0 x20: ffff000127648fd8 x19: ffff0000d6556ae0 x18: 0000000000000501 x17: ff8080000ff51148 x16: 0000000000000000 x15: ffff80000ff51148 x14: 0000000000000001 x13: ffffffffffffffff x12: 0000000000000501 x11: 0000000000000501 x10: 0000000000000501 x9 : 0000000000000030 x8 : ffff0000ce4fb680 x7 : ffff80000fd8ab98 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000d6556ae0 x1 : ffff0000d6556ae0 x0 : 0000000000000001 Call trace: preempt_count arch/arm64/include/asm/preempt.h:12 [inline] check_kcov_mode kernel/kcov.c:163 [inline] __sanitizer_cov_trace_pc+0x2c/0xa4 kernel/kcov.c:197 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1ec/0x1fc0 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3879 [inline] __dev_queue_xmit+0x1068/0x2a6c net/core/dev.c:4190 dev_queue_xmit+0x24/0x34 net/core/dev.c:4258 neigh_connected_output+0x334/0x378 net/core/neighbour.c:1553 neigh_output include/net/neighbour.h:516 [inline] ip6_finish_output2+0x1344/0x1c48 net/ipv6/ip6_output.c:126 __ip6_finish_output+0x518/0x67c net/ipv6/ip6_output.c:191 ip6_finish_output+0x40/0x218 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:449 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0xbf8/0x1788 net/ipv6/ndisc.c:508 ndisc_send_rs+0x494/0x5fc net/ipv6/ndisc.c:702 addrconf_rs_timer+0x308/0x5a8 net/ipv6/addrconf.c:3932 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x554/0x718 kernel/time/timer.c:1737 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1750 __do_softirq+0x344/0xe20 kernel/softirq.c:558 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:439 [inline] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 irq_exit+0x14/0x88 kernel/softirq.c:660 handle_domain_irq+0xf4/0x178 kernel/irq/irqdesc.c:710 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:757 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:442 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:458 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:580 unwind_frame+0x46c/0x550 arch/arm64/kernel/stacktrace.c:134 walk_stackframe arch/arm64/kernel/stacktrace.c:148 [inline] arch_stack_walk+0x270/0x32c arch/arm64/kernel/stacktrace.c:238 stack_trace_save+0xfc/0x1a0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x84 mm/kasan/common.c:46 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0xdc/0x3c4 mm/slub.c:3515 kernfs_put+0x31c/0x4e4 fs/kernfs/dir.c:547 sysfs_remove_group+0x25c/0x288 fs/sysfs/group.c:293 netdev_queue_update_kobjects+0x388/0x404 net/core/net-sysfs.c:1724 netif_set_real_num_tx_queues+0x154/0x738 net/core/dev.c:2920 veth_init_queues drivers/net/veth.c:1624 [inline] veth_newlink+0x7b8/0xc08 drivers/net/veth.c:1745 __rtnl_newlink net/core/rtnetlink.c:3462 [inline] rtnl_newlink+0x1048/0x1ab8 net/core/rtnetlink.c:3510 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5587 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2504 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5605 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2412 ___sys_sendmsg+0x214/0x294 net/socket.c:2466 __sys_sendmsg net/socket.c:2495 [inline] __do_sys_sendmsg net/socket.c:2504 [inline] __se_sys_sendmsg net/socket.c:2502 [inline] __arm64_sys_sendmsg+0x1ac/0x25c net/socket.c:2502 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584