netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.15.122-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.2/4582 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
ffff800014b95880 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:206 [inline]
ffff800014b95880 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492

and this task is already holding:
ffff0000c65ec908 (&sch->q.lock){+.-.}-{2:2}, at: netem_change+0x22c/0x1a90 net/sched/sch_netem.c:972
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+0x240/0x77c kernel/locking/lockdep.c:5622
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0xb0/0x10c kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:363 [inline]
  __dev_xmit_skb net/core/dev.c:3848 [inline]
  __dev_queue_xmit+0x8d0/0x2a6c net/core/dev.c:4190
  dev_queue_xmit+0x24/0x34 net/core/dev.c:4258
  bond_start_xmit+0xdb0/0x1550 drivers/net/bonding/bond_main.c:5160
  __netdev_start_xmit include/linux/netdevice.h:5018 [inline]
  netdev_start_xmit include/linux/netdevice.h:5032 [inline]
  xmit_one net/core/dev.c:3594 [inline]
  dev_hard_start_xmit+0x2bc/0x92c net/core/dev.c:3610
  __dev_queue_xmit+0x13a8/0x2a6c net/core/dev.c:4225
  dev_queue_xmit+0x24/0x34 net/core/dev.c:4258
  neigh_resolve_output+0x52c/0x5dc net/core/neighbour.c:1493
  neigh_output include/net/neighbour.h:509 [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:291 [inline]
  ip6_output+0x270/0x594 net/ipv6/ip6_output.c:224
  dst_output include/net/dst.h:443 [inline]
  NF_HOOK include/linux/netfilter.h:302 [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:3931
  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:758
  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
  arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
  __call_rcu kernel/rcu/tree.c:3028 [inline]
  call_rcu+0x654/0xb40 kernel/rcu/tree.c:3074
  security_inode_free+0xbc/0xd8 security/security.c:1065
  __destroy_inode+0x300/0x89c fs/inode.c:261
  destroy_inode fs/inode.c:284 [inline]
  evict+0x564/0x68c fs/inode.c:602
  iput_final fs/inode.c:1705 [inline]
  iput+0x744/0x824 fs/inode.c:1731
  dentry_unlink_inode+0x370/0x4b0 fs/dcache.c:376
  __dentry_kill+0x324/0x5e4 fs/dcache.c:582
  dentry_kill+0xc8/0x250
  dput+0x21c/0x458 fs/dcache.c:888
  __fput+0x500/0x7f0 fs/file_table.c:288
  ____fput+0x20/0x30 fs/file_table.c:308
  task_work_run+0x130/0x1e4 kernel/task_work.c:164
  tracehook_notify_resume include/linux/tracehook.h:189 [inline]
  do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
  prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
  exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
  el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
  el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
  el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
  __fs_reclaim_acquire mm/page_alloc.c:4547 [inline]
  fs_reclaim_acquire+0xf0/0x1d0 mm/page_alloc.c:4561
  might_alloc include/linux/sched/mm.h:206 [inline]
  slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492
  slab_alloc_node mm/slub.c:3134 [inline]
  kmem_cache_alloc_node_trace+0xa0/0x4c4 mm/slub.c:3270
  kmalloc_node include/linux/slab.h:609 [inline]
  kzalloc_node include/linux/slab.h:732 [inline]
  alloc_worker kernel/workqueue.c:1861 [inline]
  init_rescuer+0xa4/0x264 kernel/workqueue.c:4279
  workqueue_init+0x2b4/0x640 kernel/workqueue.c:6136
  kernel_init_freeable+0x448/0x650 init/main.c:1603
  kernel_init+0x24/0x294 init/main.c:1510
  ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

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.2/4582:
 #0: ffff8000169f7028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff8000169f7028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac net/core/rtnetlink.c:5596
 #1: ffff0000c65ec908 (&sch->q.lock){+.-.}-{2:2}, at: netem_change+0x22c/0x1a90 net/sched/sch_netem.c:972

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&sch->q.lock){+.-.}-{2:2} {
   HARDIRQ-ON-W at:
                    lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
                    __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
                    _raw_spin_lock_bh+0x124/0x1c4 kernel/locking/spinlock.c:178
                    spin_lock_bh include/linux/spinlock.h:368 [inline]
                    dev_reset_queue+0xb4/0x190 net/sched/sch_generic.c:1245
                    netdev_for_each_tx_queue include/linux/netdevice.h:2379 [inline]
                    dev_deactivate_many+0x718/0xbe4 net/sched/sch_generic.c:1313
                    dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1336
                    linkwatch_do_dev+0x2a8/0x3c8 net/core/link_watch.c:165
                    __linkwatch_run_queue+0x424/0x730 net/core/link_watch.c:213
                    linkwatch_event+0x58/0x68 net/core/link_watch.c:252
                    process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
                    worker_thread+0x910/0x1034 kernel/workqueue.c:2457
                    kthread+0x37c/0x45c kernel/kthread.c:319
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
   IN-SOFTIRQ-W at:
                    lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
                    __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                    _raw_spin_lock+0xb0/0x10c kernel/locking/spinlock.c:154
                    spin_lock include/linux/spinlock.h:363 [inline]
                    __dev_xmit_skb net/core/dev.c:3848 [inline]
                    __dev_queue_xmit+0x8d0/0x2a6c net/core/dev.c:4190
                    dev_queue_xmit+0x24/0x34 net/core/dev.c:4258
                    bond_start_xmit+0xdb0/0x1550 drivers/net/bonding/bond_main.c:5160
                    __netdev_start_xmit include/linux/netdevice.h:5018 [inline]
                    netdev_start_xmit include/linux/netdevice.h:5032 [inline]
                    xmit_one net/core/dev.c:3594 [inline]
                    dev_hard_start_xmit+0x2bc/0x92c net/core/dev.c:3610
                    __dev_queue_xmit+0x13a8/0x2a6c net/core/dev.c:4225
                    dev_queue_xmit+0x24/0x34 net/core/dev.c:4258
                    neigh_resolve_output+0x52c/0x5dc net/core/neighbour.c:1493
                    neigh_output include/net/neighbour.h:509 [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:291 [inline]
                    ip6_output+0x270/0x594 net/ipv6/ip6_output.c:224
                    dst_output include/net/dst.h:443 [inline]
                    NF_HOOK include/linux/netfilter.h:302 [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:3931
                    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:758
                    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
                    arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
                    __call_rcu kernel/rcu/tree.c:3028 [inline]
                    call_rcu+0x654/0xb40 kernel/rcu/tree.c:3074
                    security_inode_free+0xbc/0xd8 security/security.c:1065
                    __destroy_inode+0x300/0x89c fs/inode.c:261
                    destroy_inode fs/inode.c:284 [inline]
                    evict+0x564/0x68c fs/inode.c:602
                    iput_final fs/inode.c:1705 [inline]
                    iput+0x744/0x824 fs/inode.c:1731
                    dentry_unlink_inode+0x370/0x4b0 fs/dcache.c:376
                    __dentry_kill+0x324/0x5e4 fs/dcache.c:582
                    dentry_kill+0xc8/0x250
                    dput+0x21c/0x458 fs/dcache.c:888
                    __fput+0x500/0x7f0 fs/file_table.c:288
                    ____fput+0x20/0x30 fs/file_table.c:308
                    task_work_run+0x130/0x1e4 kernel/task_work.c:164
                    tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                    do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
                    prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
                    exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
                    el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
                    el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
                    el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
   INITIAL USE at:
                   lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
                   __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
                   _raw_spin_lock_bh+0x124/0x1c4 kernel/locking/spinlock.c:178
                   spin_lock_bh include/linux/spinlock.h:368 [inline]
                   dev_reset_queue+0xb4/0x190 net/sched/sch_generic.c:1245
                   netdev_for_each_tx_queue include/linux/netdevice.h:2379 [inline]
                   dev_deactivate_many+0x718/0xbe4 net/sched/sch_generic.c:1313
                   dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1336
                   linkwatch_do_dev+0x2a8/0x3c8 net/core/link_watch.c:165
                   __linkwatch_run_queue+0x424/0x730 net/core/link_watch.c:213
                   linkwatch_event+0x58/0x68 net/core/link_watch.c:252
                   process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
                   worker_thread+0x910/0x1034 kernel/workqueue.c:2457
                   kthread+0x37c/0x45c kernel/kthread.c:319
                   ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
 }
 ... key      at: [<ffff8000187ef340>] 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+0x240/0x77c kernel/locking/lockdep.c:5622
                    __fs_reclaim_acquire mm/page_alloc.c:4547 [inline]
                    fs_reclaim_acquire+0xf0/0x1d0 mm/page_alloc.c:4561
                    might_alloc include/linux/sched/mm.h:206 [inline]
                    slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492
                    slab_alloc_node mm/slub.c:3134 [inline]
                    kmem_cache_alloc_node_trace+0xa0/0x4c4 mm/slub.c:3270
                    kmalloc_node include/linux/slab.h:609 [inline]
                    kzalloc_node include/linux/slab.h:732 [inline]
                    alloc_worker kernel/workqueue.c:1861 [inline]
                    init_rescuer+0xa4/0x264 kernel/workqueue.c:4279
                    workqueue_init+0x2b4/0x640 kernel/workqueue.c:6136
                    kernel_init_freeable+0x448/0x650 init/main.c:1603
                    kernel_init+0x24/0x294 init/main.c:1510
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
   SOFTIRQ-ON-W at:
                    lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
                    __fs_reclaim_acquire mm/page_alloc.c:4547 [inline]
                    fs_reclaim_acquire+0xf0/0x1d0 mm/page_alloc.c:4561
                    might_alloc include/linux/sched/mm.h:206 [inline]
                    slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492
                    slab_alloc_node mm/slub.c:3134 [inline]
                    kmem_cache_alloc_node_trace+0xa0/0x4c4 mm/slub.c:3270
                    kmalloc_node include/linux/slab.h:609 [inline]
                    kzalloc_node include/linux/slab.h:732 [inline]
                    alloc_worker kernel/workqueue.c:1861 [inline]
                    init_rescuer+0xa4/0x264 kernel/workqueue.c:4279
                    workqueue_init+0x2b4/0x640 kernel/workqueue.c:6136
                    kernel_init_freeable+0x448/0x650 init/main.c:1603
                    kernel_init+0x24/0x294 init/main.c:1510
                    ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
   INITIAL USE at:
                   lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
                   __fs_reclaim_acquire mm/page_alloc.c:4547 [inline]
                   fs_reclaim_acquire+0xf0/0x1d0 mm/page_alloc.c:4561
                   might_alloc include/linux/sched/mm.h:206 [inline]
                   slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492
                   slab_alloc_node mm/slub.c:3134 [inline]
                   kmem_cache_alloc_node_trace+0xa0/0x4c4 mm/slub.c:3270
                   kmalloc_node include/linux/slab.h:609 [inline]
                   kzalloc_node include/linux/slab.h:732 [inline]
                   alloc_worker kernel/workqueue.c:1861 [inline]
                   init_rescuer+0xa4/0x264 kernel/workqueue.c:4279
                   workqueue_init+0x2b4/0x640 kernel/workqueue.c:6136
                   kernel_init_freeable+0x448/0x650 init/main.c:1603
                   kernel_init+0x24/0x294 init/main.c:1510
                   ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
 }
 ... key      at: [<ffff800014b95880>] __fs_reclaim_map+0x0/0x200
 ... acquired at:
   __fs_reclaim_acquire mm/page_alloc.c:4547 [inline]
   fs_reclaim_acquire+0xf0/0x1d0 mm/page_alloc.c:4561
   might_alloc include/linux/sched/mm.h:206 [inline]
   slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492
   slab_alloc_node mm/slub.c:3134 [inline]
   __kmalloc_node+0xbc/0x5b8 mm/slub.c:4451
   kmalloc_node include/linux/slab.h:614 [inline]
   kvmalloc_node+0x88/0x204 mm/util.c:619
   kvmalloc include/linux/mm.h:805 [inline]
   get_dist_table+0x9c/0x2a4 net/sched/sch_netem.c:788
   netem_change+0x7cc/0x1a90 net/sched/sch_netem.c:988
   netem_init+0x54/0xb8 net/sched/sch_netem.c:1075
   qdisc_create+0x6fc/0xf44 net/sched/sch_api.c:1264
   tc_modify_qdisc+0x8dc/0x1344
   rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5599
   netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2505
   rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5617
   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:1924
   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


stack backtrace:
CPU: 0 PID: 4582 Comm: syz-executor.2 Not tainted 5.15.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __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+0x62b4/0x7620 kernel/locking/lockdep.c:5011
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
 __fs_reclaim_acquire mm/page_alloc.c:4547 [inline]
 fs_reclaim_acquire+0xf0/0x1d0 mm/page_alloc.c:4561
 might_alloc include/linux/sched/mm.h:206 [inline]
 slab_pre_alloc_hook+0x38/0xe8 mm/slab.h:492
 slab_alloc_node mm/slub.c:3134 [inline]
 __kmalloc_node+0xbc/0x5b8 mm/slub.c:4451
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x88/0x204 mm/util.c:619
 kvmalloc include/linux/mm.h:805 [inline]
 get_dist_table+0x9c/0x2a4 net/sched/sch_netem.c:788
 netem_change+0x7cc/0x1a90 net/sched/sch_netem.c:988
 netem_init+0x54/0xb8 net/sched/sch_netem.c:1075
 qdisc_create+0x6fc/0xf44 net/sched/sch_api.c:1264
 tc_modify_qdisc+0x8dc/0x1344
 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5599
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2505
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5617
 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:1924
 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
BUG: sleeping function called from invalid context at include/linux/sched/mm.h:209
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4582, name: syz-executor.2
INFO: lockdep is turned off.
Preemption disabled at:
[<ffff80001005175c>] netem_change+0x22c/0x1a90 net/sched/sch_netem.c:972
CPU: 0 PID: 4582 Comm: syz-executor.2 Not tainted 5.15.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __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_sleep+0x380/0x4dc kernel/sched/core.c:9625
 __might_sleep+0x98/0xf0 kernel/sched/core.c:9579
 might_alloc include/linux/sched/mm.h:209 [inline]
 slab_pre_alloc_hook+0x58/0xe8 mm/slab.h:492
 slab_alloc_node mm/slub.c:3134 [inline]
 __kmalloc_node+0xbc/0x5b8 mm/slub.c:4451
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x88/0x204 mm/util.c:619
 kvmalloc include/linux/mm.h:805 [inline]
 get_dist_table+0x9c/0x2a4 net/sched/sch_netem.c:788
 netem_change+0x7cc/0x1a90 net/sched/sch_netem.c:988
 netem_init+0x54/0xb8 net/sched/sch_netem.c:1075
 qdisc_create+0x6fc/0xf44 net/sched/sch_api.c:1264
 tc_modify_qdisc+0x8dc/0x1344
 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5599
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2505
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5617
 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:1924
 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