INFO: task syz-executor:15004 blocked for more than 155 seconds.
      Not tainted 6.10.0-rc6-next-20240703-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21024 pid:15004 tgid:15004 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6600
 __schedule_loop kernel/sched/core.c:6677 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6692
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6749
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 new_device_store+0x1b4/0x890 drivers/net/netdevsim/bus.c:166
 kernfs_fop_write_iter+0x3a1/0x500 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f075957475f
RSP: 002b:00007ffcc3dabac0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f075957475f
RDX: 0000000000000003 RSI: 00007ffcc3dabb10 RDI: 0000000000000005
RBP: 00007f07595e45c4 R08: 0000000000000000 R09: 00007ffcc3dab917
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007ffcc3dabb10 R14: 00007f075a234620 R15: 0000000000000003
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
 #0: ffff888029f5b948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
 #0: ffff888029f5b948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
 #1: ffffc90000107d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
 #1: ffffc90000107d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
 #2: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193
1 lock held by khungtaskd/30:
 #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:333 [inline]
 #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:845 [inline]
 #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6704
2 locks held by getty/4854:
 #0: ffff88802abcd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:11/6036:
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
 #1: ffffc9000407fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
 #1: ffffc9000407fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
 #2: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
5 locks held by kworker/1:13/6038:
1 lock held by syz.0.1251/9575:
5 locks held by kworker/u8:17/9868:
 #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
 #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
 #1: ffffc90003247d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
 #1: ffffc90003247d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
 #2: ffffffff8f5f2c10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
 #3: ffffffff8f5ff788 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe9/0xa90 net/core/dev.c:11887
 #4: ffffffff8e33ac38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
 #4: ffffffff8e33ac38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:980
3 locks held by kworker/u8:7/14247:
4 locks held by syz-executor/15004:
 #0: ffff88807cdb6420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #0: ffff88807cdb6420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
 #1: ffff88802330bc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
 #2: ffff888021d46008 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
 #3: 
ffffffff8ef05248
 (
nsim_bus_dev_list_lock
){+.+.}-{3:3}
, at: new_device_store+0x1b4/0x890 drivers/net/netdevsim/bus.c:166
4 locks held by syz-executor/15072:
 #0: 
ffff88807cdb6420
 (
sb_writers#8
){.+.+}-{0:0}
, at: file_start_write include/linux/fs.h:2876 [inline]
, at: vfs_write+0x227/0xc90 fs/read_write.c:586
 #1: 
ffff888067e5f088
 (
&of->mutex){+.+.}-{3:3}
, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
 #2: ffff888021d460f8
 (
kn->active
#49){.+.+}-{0:0}
, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
 #3: ffffffff8ef05248
 (
nsim_bus_dev_list_lock){+.+.}-{3:3}
, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
7 locks held by syz-executor/15077:
 #0: 
ffff88807cdb6420
 (
sb_writers
#8
){.+.+}-{0:0}
, at: file_start_write include/linux/fs.h:2876 [inline]
, at: vfs_write+0x227/0xc90 fs/read_write.c:586
 #1: ffff88806cff6488
 (
&of->mutex){+.+.}-{3:3}
, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
 #2: ffff888021d460f8
 (
kn->active
#49
){.+.+}-{0:0}
, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
 #3: 
ffffffff8ef05248
 (
nsim_bus_dev_list_lock
){+.+.}-{3:3}
, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
 #4: 
ffff8880615130e8
 (
&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1292
 #5: ffff888061514250
 (
&devlink->lock_key
#51
){+.+.}-{3:3}
, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
 #6: 
ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: unregister_nexthop_notifier+0x17/0x40 net/ipv4/nexthop.c:3899
1 lock held by syz-executor/15081:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15110:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15113:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15116:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: __rtnl_newlink net/core/rtnetlink.c:3807 [inline]
, at: rtnl_newlink+0xa0d/0x2070 net/core/rtnetlink.c:3830
1 lock held by syz-executor/15126:
 #0: ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15133:
 #0: 
ffffffff8f5ff788
 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15137:
 #0: ffffffff8f5ff788
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15138:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15144:
 #0: 
ffffffff8f5ff788
 (rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15149:
 #0: ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15151:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15155:
 #0: ffffffff8f5ff788
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15157:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15160:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15164:
 #0: 
ffffffff8f5ff788
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:149 [inline]
, at: rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
1 lock held by syz-executor/15166:
 #0: