netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.1.43-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.2/11863 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
ffff800015b3c2e0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:271 [inline]
ffff800015b3c2e0 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slab.h:710 [inline]
ffff800015b3c2e0 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3318 [inline]
ffff800015b3c2e0 (fs_reclaim){+.+.}-{0:0}, at: __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437

and this task is already holding:
ffff0000d05d8908 (&sch->q.lock){+.-.}-{2:2}, at: sch_tree_lock+0x120/0x1d4
which would create a new lock dependency:
 (&sch->q.lock){+.-.}-{2:2} -> (fs_reclaim){+.+.}-{0:0}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (&sch->q.lock){+.-.}-{2:2}

... which became SOFTIRQ-irq-safe at:
  lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
  __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
  _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:350 [inline]
  __dev_xmit_skb net/core/dev.c:3854 [inline]
  __dev_queue_xmit+0xb14/0x38d8 net/core/dev.c:4227
  dev_queue_xmit include/linux/netdevice.h:3021 [inline]
  br_dev_queue_push_xmit+0x570/0x710 net/bridge/br_forward.c:53
  br_nf_dev_queue_xmit+0x434/0x1844
  NF_HOOK+0x6a0/0x750 include/linux/netfilter.h:302
  br_nf_post_routing+0x83c/0xc18 net/bridge/br_netfilter_hooks.c:855
  nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
  nf_hook_slow+0xc8/0x1f4 net/netfilter/core.c:614
  nf_hook include/linux/netfilter.h:257 [inline]
  NF_HOOK+0x258/0x408 include/linux/netfilter.h:300
  br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66
  br_nf_forward_finish+0x844/0xbfc net/bridge/br_netfilter_hooks.c:566
  NF_HOOK+0x6a0/0x750 include/linux/netfilter.h:302
  br_nf_forward_ip+0xa10/0xe78 net/bridge/br_netfilter_hooks.c:636
  nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
  nf_hook_slow+0xc8/0x1f4 net/netfilter/core.c:614
  nf_hook include/linux/netfilter.h:257 [inline]
  NF_HOOK+0x258/0x408 include/linux/netfilter.h:300
  __br_forward+0x2f0/0x458 net/bridge/br_forward.c:115
  br_flood+0x370/0x3e0
  br_handle_frame_finish+0x1198/0x16ac net/bridge/br_input.c:193
  br_nf_hook_thresh+0x38c/0x480
  br_nf_pre_routing_finish_ipv6+0x858/0xb4c
  NF_HOOK include/linux/netfilter.h:302 [inline]
  br_nf_pre_routing_ipv6+0x2ac/0x62c net/bridge/br_netfilter_ipv6.c:237
  br_nf_pre_routing+0x5a0/0x11cc net/bridge/br_netfilter_hooks.c:507
  nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
  nf_hook_bridge_pre net/bridge/br_input.c:255 [inline]
  br_handle_frame+0x800/0xff0 net/bridge/br_input.c:399
  __netif_receive_skb_core+0xef0/0x3788 net/core/dev.c:5390
  __netif_receive_skb_one_core net/core/dev.c:5494 [inline]
  __netif_receive_skb+0x114/0x400 net/core/dev.c:5610
  process_backlog+0x410/0x784 net/core/dev.c:5938
  __napi_poll+0xb4/0x3f0 net/core/dev.c:6505
  napi_poll net/core/dev.c:6572 [inline]
  net_rx_action+0x5cc/0xd3c net/core/dev.c:6683
  __do_softirq+0x30c/0xea0 kernel/softirq.c:571
  run_ksoftirqd+0x68/0x258 kernel/softirq.c:934
  smpboot_thread_fn+0x4b0/0x96c kernel/smpboot.c:164
  kthread+0x250/0x2d8 kernel/kthread.c:376
  ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

to a SOFTIRQ-irq-unsafe lock:
 (fs_reclaim){+.+.}-{0:0}

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
  __fs_reclaim_acquire mm/page_alloc.c:4683 [inline]
  fs_reclaim_acquire+0x90/0x12c mm/page_alloc.c:4697
  might_alloc include/linux/sched/mm.h:271 [inline]
  slab_pre_alloc_hook mm/slab.h:710 [inline]
  slab_alloc_node mm/slub.c:3318 [inline]
  __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437
  kmalloc_node_trace+0x44/0x90 mm/slab_common.c:1058
  kmalloc_node include/linux/slab.h:575 [inline]
  kzalloc_node include/linux/slab.h:700 [inline]
  alloc_worker kernel/workqueue.c:1843 [inline]
  init_rescuer+0xa4/0x264 kernel/workqueue.c:4272
  workqueue_init+0x298/0x5b4 kernel/workqueue.c:6101
  kernel_init_freeable+0x33c/0x528 init/main.c:1614
  kernel_init+0x24/0x29c init/main.c:1519
  ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

other info that might help us debug this:

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(fs_reclaim);
                               local_irq_disable();
                               lock(&sch->q.lock);
                               lock(fs_reclaim);
  <Interrupt>
    lock(&sch->q.lock);

 *** DEADLOCK ***

2 locks held by syz-executor.2/11863:
 #0: ffff800017e6fac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
 #0: ffff800017e6fac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e8/0xd94 net/core/rtnetlink.c:6100
 #1: ffff0000d05d8908 (&sch->q.lock){+.-.}-{2:2}, at: sch_tree_lock+0x120/0x1d4

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&sch->q.lock){+.-.}-{2:2} {
   HARDIRQ-ON-W at:
                    lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
                    __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
                    _raw_spin_lock_bh+0x54/0x6c kernel/locking/spinlock.c:178
                    spin_lock_bh include/linux/spinlock.h:355 [inline]
                    dev_reset_queue+0x130/0x1fc net/sched/sch_generic.c:1291
                    netdev_for_each_tx_queue include/linux/netdevice.h:2453 [inline]
                    dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1359
                    dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1382
                    linkwatch_do_dev+0x29c/0x3a4 net/core/link_watch.c:166
                    __linkwatch_run_queue+0x3a0/0x700 net/core/link_watch.c:221
                    linkwatch_event+0x58/0x68 net/core/link_watch.c:264
                    process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292
                    worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
                    kthread+0x250/0x2d8 kernel/kthread.c:376
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
   IN-SOFTIRQ-W at:
                    lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
                    __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
                    _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154
                    spin_lock include/linux/spinlock.h:350 [inline]
                    __dev_xmit_skb net/core/dev.c:3854 [inline]
                    __dev_queue_xmit+0xb14/0x38d8 net/core/dev.c:4227
                    dev_queue_xmit include/linux/netdevice.h:3021 [inline]
                    br_dev_queue_push_xmit+0x570/0x710 net/bridge/br_forward.c:53
                    br_nf_dev_queue_xmit+0x434/0x1844
                    NF_HOOK+0x6a0/0x750 include/linux/netfilter.h:302
                    br_nf_post_routing+0x83c/0xc18 net/bridge/br_netfilter_hooks.c:855
                    nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
                    nf_hook_slow+0xc8/0x1f4 net/netfilter/core.c:614
                    nf_hook include/linux/netfilter.h:257 [inline]
                    NF_HOOK+0x258/0x408 include/linux/netfilter.h:300
                    br_forward_finish+0xd0/0x118 net/bridge/br_forward.c:66
                    br_nf_forward_finish+0x844/0xbfc net/bridge/br_netfilter_hooks.c:566
                    NF_HOOK+0x6a0/0x750 include/linux/netfilter.h:302
                    br_nf_forward_ip+0xa10/0xe78 net/bridge/br_netfilter_hooks.c:636
                    nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
                    nf_hook_slow+0xc8/0x1f4 net/netfilter/core.c:614
                    nf_hook include/linux/netfilter.h:257 [inline]
                    NF_HOOK+0x258/0x408 include/linux/netfilter.h:300
                    __br_forward+0x2f0/0x458 net/bridge/br_forward.c:115
                    br_flood+0x370/0x3e0
                    br_handle_frame_finish+0x1198/0x16ac net/bridge/br_input.c:193
                    br_nf_hook_thresh+0x38c/0x480
                    br_nf_pre_routing_finish_ipv6+0x858/0xb4c
                    NF_HOOK include/linux/netfilter.h:302 [inline]
                    br_nf_pre_routing_ipv6+0x2ac/0x62c net/bridge/br_netfilter_ipv6.c:237
                    br_nf_pre_routing+0x5a0/0x11cc net/bridge/br_netfilter_hooks.c:507
                    nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
                    nf_hook_bridge_pre net/bridge/br_input.c:255 [inline]
                    br_handle_frame+0x800/0xff0 net/bridge/br_input.c:399
                    __netif_receive_skb_core+0xef0/0x3788 net/core/dev.c:5390
                    __netif_receive_skb_one_core net/core/dev.c:5494 [inline]
                    __netif_receive_skb+0x114/0x400 net/core/dev.c:5610
                    process_backlog+0x410/0x784 net/core/dev.c:5938
                    __napi_poll+0xb4/0x3f0 net/core/dev.c:6505
                    napi_poll net/core/dev.c:6572 [inline]
                    net_rx_action+0x5cc/0xd3c net/core/dev.c:6683
                    __do_softirq+0x30c/0xea0 kernel/softirq.c:571
                    run_ksoftirqd+0x68/0x258 kernel/softirq.c:934
                    smpboot_thread_fn+0x4b0/0x96c kernel/smpboot.c:164
                    kthread+0x250/0x2d8 kernel/kthread.c:376
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
   INITIAL USE at:
                   lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
                   __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
                   _raw_spin_lock_bh+0x54/0x6c kernel/locking/spinlock.c:178
                   spin_lock_bh include/linux/spinlock.h:355 [inline]
                   dev_reset_queue+0x130/0x1fc net/sched/sch_generic.c:1291
                   netdev_for_each_tx_queue include/linux/netdevice.h:2453 [inline]
                   dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1359
                   dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1382
                   linkwatch_do_dev+0x29c/0x3a4 net/core/link_watch.c:166
                   __linkwatch_run_queue+0x3a0/0x700 net/core/link_watch.c:221
                   linkwatch_event+0x58/0x68 net/core/link_watch.c:264
                   process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292
                   worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
                   kthread+0x250/0x2d8 kernel/kthread.c:376
                   ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
 }
 ... key      at: [<ffff800019d20ae0>] qdisc_alloc.__key+0x0/0x20

the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
-> (fs_reclaim){+.+.}-{0:0} {
   HARDIRQ-ON-W at:
                    lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
                    __fs_reclaim_acquire mm/page_alloc.c:4683 [inline]
                    fs_reclaim_acquire+0x90/0x12c mm/page_alloc.c:4697
                    might_alloc include/linux/sched/mm.h:271 [inline]
                    slab_pre_alloc_hook mm/slab.h:710 [inline]
                    slab_alloc_node mm/slub.c:3318 [inline]
                    __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437
                    kmalloc_node_trace+0x44/0x90 mm/slab_common.c:1058
                    kmalloc_node include/linux/slab.h:575 [inline]
                    kzalloc_node include/linux/slab.h:700 [inline]
                    alloc_worker kernel/workqueue.c:1843 [inline]
                    init_rescuer+0xa4/0x264 kernel/workqueue.c:4272
                    workqueue_init+0x298/0x5b4 kernel/workqueue.c:6101
                    kernel_init_freeable+0x33c/0x528 init/main.c:1614
                    kernel_init+0x24/0x29c init/main.c:1519
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
   SOFTIRQ-ON-W at:
                    lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
                    __fs_reclaim_acquire mm/page_alloc.c:4683 [inline]
                    fs_reclaim_acquire+0x90/0x12c mm/page_alloc.c:4697
                    might_alloc include/linux/sched/mm.h:271 [inline]
                    slab_pre_alloc_hook mm/slab.h:710 [inline]
                    slab_alloc_node mm/slub.c:3318 [inline]
                    __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437
                    kmalloc_node_trace+0x44/0x90 mm/slab_common.c:1058
                    kmalloc_node include/linux/slab.h:575 [inline]
                    kzalloc_node include/linux/slab.h:700 [inline]
                    alloc_worker kernel/workqueue.c:1843 [inline]
                    init_rescuer+0xa4/0x264 kernel/workqueue.c:4272
                    workqueue_init+0x298/0x5b4 kernel/workqueue.c:6101
                    kernel_init_freeable+0x33c/0x528 init/main.c:1614
                    kernel_init+0x24/0x29c init/main.c:1519
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
   INITIAL USE at:
                   lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
                   __fs_reclaim_acquire mm/page_alloc.c:4683 [inline]
                   fs_reclaim_acquire+0x90/0x12c mm/page_alloc.c:4697
                   might_alloc include/linux/sched/mm.h:271 [inline]
                   slab_pre_alloc_hook mm/slab.h:710 [inline]
                   slab_alloc_node mm/slub.c:3318 [inline]
                   __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437
                   kmalloc_node_trace+0x44/0x90 mm/slab_common.c:1058
                   kmalloc_node include/linux/slab.h:575 [inline]
                   kzalloc_node include/linux/slab.h:700 [inline]
                   alloc_worker kernel/workqueue.c:1843 [inline]
                   init_rescuer+0xa4/0x264 kernel/workqueue.c:4272
                   workqueue_init+0x298/0x5b4 kernel/workqueue.c:6101
                   kernel_init_freeable+0x33c/0x528 init/main.c:1614
                   kernel_init+0x24/0x29c init/main.c:1519
                   ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
 }
 ... key      at: [<ffff800015b3c2e0>] __fs_reclaim_map+0x0/0xe0
 ... acquired at:
   __fs_reclaim_acquire mm/page_alloc.c:4683 [inline]
   fs_reclaim_acquire+0x90/0x12c mm/page_alloc.c:4697
   might_alloc include/linux/sched/mm.h:271 [inline]
   slab_pre_alloc_hook mm/slab.h:710 [inline]
   slab_alloc_node mm/slub.c:3318 [inline]
   __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437
   __do_kmalloc_node mm/slab_common.c:954 [inline]
   __kmalloc_node+0xcc/0x1d0 mm/slab_common.c:962
   kmalloc_node include/linux/slab.h:579 [inline]
   kvmalloc_node+0x84/0x1e4 mm/util.c:581
   kvmalloc include/linux/slab.h:706 [inline]
   get_dist_table+0xa0/0x354 net/sched/sch_netem.c:788
   netem_change+0x754/0x1900 net/sched/sch_netem.c:985
   netem_init+0x54/0xb8 net/sched/sch_netem.c:1072
   qdisc_create+0x70c/0xe64 net/sched/sch_api.c:1314
   tc_modify_qdisc+0x9f0/0x1840
   rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6103
   netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2525
   rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6121
   netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
   netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1354
   netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1903
   sock_sendmsg_nosec net/socket.c:716 [inline]
   sock_sendmsg net/socket.c:736 [inline]
   ____sys_sendmsg+0x558/0x844 net/socket.c:2482
   ___sys_sendmsg net/socket.c:2536 [inline]
   __sys_sendmsg+0x26c/0x33c net/socket.c:2565
   __do_sys_sendmsg net/socket.c:2574 [inline]
   __se_sys_sendmsg net/socket.c:2572 [inline]
   __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2572
   __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
   invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
   el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
   do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
   el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
   el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
   el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581


stack backtrace:
CPU: 1 PID: 11863 Comm: syz-executor.2 Not tainted 6.1.43-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __lock_acquire+0x6310/0x764c kernel/locking/lockdep.c:5056
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline]
 fs_reclaim_acquire+0x90/0x12c mm/page_alloc.c:4697
 might_alloc include/linux/sched/mm.h:271 [inline]
 slab_pre_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3318 [inline]
 __kmem_cache_alloc_node+0x58/0x388 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node+0xcc/0x1d0 mm/slab_common.c:962
 kmalloc_node include/linux/slab.h:579 [inline]
 kvmalloc_node+0x84/0x1e4 mm/util.c:581
 kvmalloc include/linux/slab.h:706 [inline]
 get_dist_table+0xa0/0x354 net/sched/sch_netem.c:788
 netem_change+0x754/0x1900 net/sched/sch_netem.c:985
 netem_init+0x54/0xb8 net/sched/sch_netem.c:1072
 qdisc_create+0x70c/0xe64 net/sched/sch_api.c:1314
 tc_modify_qdisc+0x9f0/0x1840
 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6103
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2525
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6121
 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
 netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1354
 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1903
 sock_sendmsg_nosec net/socket.c:716 [inline]
 sock_sendmsg net/socket.c:736 [inline]
 ____sys_sendmsg+0x558/0x844 net/socket.c:2482
 ___sys_sendmsg net/socket.c:2536 [inline]
 __sys_sendmsg+0x26c/0x33c net/socket.c:2565
 __do_sys_sendmsg net/socket.c:2574 [inline]
 __se_sys_sendmsg net/socket.c:2572 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2572
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 11863, name: syz-executor.2
preempt_count: 201, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<ffff8000106c9ce0>] sch_tree_lock+0x120/0x1d4
CPU: 1 PID: 11863 Comm: syz-executor.2 Not tainted 6.1.43-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __might_resched+0x37c/0x4d8 kernel/sched/core.c:9941
 __might_sleep+0x90/0xe4 kernel/sched/core.c:9870
 might_alloc include/linux/sched/mm.h:274 [inline]
 slab_pre_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3318 [inline]
 __kmem_cache_alloc_node+0x74/0x388 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node+0xcc/0x1d0 mm/slab_common.c:962
 kmalloc_node include/linux/slab.h:579 [inline]
 kvmalloc_node+0x84/0x1e4 mm/util.c:581
 kvmalloc include/linux/slab.h:706 [inline]
 get_dist_table+0xa0/0x354 net/sched/sch_netem.c:788
 netem_change+0x754/0x1900 net/sched/sch_netem.c:985
 netem_init+0x54/0xb8 net/sched/sch_netem.c:1072
 qdisc_create+0x70c/0xe64 net/sched/sch_api.c:1314
 tc_modify_qdisc+0x9f0/0x1840
 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6103
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2525
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6121
 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
 netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1354
 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1903
 sock_sendmsg_nosec net/socket.c:716 [inline]
 sock_sendmsg net/socket.c:736 [inline]
 ____sys_sendmsg+0x558/0x844 net/socket.c:2482
 ___sys_sendmsg net/socket.c:2536 [inline]
 __sys_sendmsg+0x26c/0x33c net/socket.c:2565
 __do_sys_sendmsg net/socket.c:2574 [inline]
 __se_sys_sendmsg net/socket.c:2572 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2572
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581