INFO: task kworker/1:9:6673 blocked for more than 143 seconds.
      Not tainted 6.4.0-next-20230628-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:9     state:D stack:25520 pid:6673  ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6710
 schedule+0xde/0x1a0 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task syz-executor.1:25343 blocked for more than 143 seconds.
      Not tainted 6.4.0-next-20230628-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:24456 pid:25343 ppid:1      flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6710
 schedule+0xde/0x1a0 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 wiphy_lock include/net/cfg80211.h:5773 [inline]
 reg_process_self_managed_hints+0x78/0x170 net/wireless/reg.c:3181
 wiphy_register+0x20e1/0x2ad0 net/wireless/core.c:983
 ieee80211_register_hw+0x23c1/0x40e0 net/mac80211/main.c:1392
 mac80211_hwsim_new_radio+0x26e6/0x4c70 drivers/net/wireless/virtual/mac80211_hwsim.c:5303
 hwsim_new_radio_nl+0xacf/0x1210 drivers/net/wireless/virtual/mac80211_hwsim.c:5983
 genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:970
 genl_family_rcv_msg net/netlink/genetlink.c:1050 [inline]
 genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1067
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2549
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1078
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1914
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:748
 __sys_sendto+0x254/0x350 net/socket.c:2134
 __do_sys_sendto net/socket.c:2146 [inline]
 __se_sys_sendto net/socket.c:2142 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2142
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7faa6143e2ac
RSP: 002b:00007ffc425ed660 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007faa620d4620 RCX: 00007faa6143e2ac
RDX: 0000000000000024 RSI: 00007faa620d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc425ed6b4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007faa620d4670 R14: 0000000000000003 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8c9a2170 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8c9a1e70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
 #0: ffffffff8c9a2d80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
3 locks held by ipv6_addrconf/2597:
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc9000b98fd50 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
2 locks held by getty/4783:
 #0: ffff888028989098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf08/0x13f0 drivers/tty/n_tty.c:2187
3 locks held by kworker/1:9/6673:
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff888027fc7138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc9000567fdb0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
4 locks held by kworker/0:16/7456:
4 locks held by kworker/0:28/7636:
2 locks held by kworker/u4:70/11802:
4 locks held by kworker/0:1/14169:
4 locks held by kworker/0:4/17067:
4 locks held by kworker/0:5/17205:
4 locks held by kworker/0:0/19602:
7 locks held by kworker/0:2/19614:
4 locks held by kworker/0:3/20117:
4 locks held by kworker/0:6/20725:
4 locks held by kworker/0:7/21214:
4 locks held by kworker/0:8/23253:
1 lock held by syz-executor.1/25246:
4 locks held by syz-executor.1/25343:
 #0: ffffffff8e467970 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1077
 #1: ffffffff8e467a28 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffffffff8e467a28 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x51a/0x7e0 net/netlink/genetlink.c:1065
 #2: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: wiphy_register+0x1f53/0x2ad0 net/wireless/core.c:962
 #3: ffff88803bdf8768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5773 [inline]
 #3: ffff88803bdf8768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_process_self_managed_hints+0x78/0x170 net/wireless/reg.c:3181
3 locks held by kworker/0:19/25365:
2 locks held by kworker/0:20/25366:
2 locks held by kworker/0:22/25368:
1 lock held by syz-executor.1/25370:
 #0: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline]
 #0: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421
1 lock held by syz-executor.1/25382:
 #0: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline]
 #0: ffffffff8e3cdf68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-next-20230628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe16/0x1090 kernel/hung_task.c:379
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 19614 Comm: kworker/0:2 Not tainted 6.4.0-next-20230628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: events cfg80211_wiphy_work
RIP: 0010:unwind_next_frame+0x4d5/0x1f70 arch/x86/kernel/unwind_orc.c:517
Code: 39 03 00 00 41 80 fe 04 0f 84 c3 0d 00 00 41 80 fe 05 0f 85 e8 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 <80> 3c 02 00 0f 85 57 1a 00 00 48 89 c8 4d 8b 75 38 48 ba 00 00 00
RSP: 0018:ffffc90000006ec8 EFLAGS: 00000a06
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff8f33f3d8
RDX: 1ffff92000000dee RSI: 0000000000000001 RDI: ffffffff8ebab718
RBP: ffffc90000006f80 R08: ffffffff8f33f3dc R09: ffffc90008147f18
R10: ffffc90000006f38 R11: 0000000000096001 R12: ffffc90000006f88
R13: ffffc90000006f38 R14: 0000000000000005 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020200030 CR3: 0000000095f84000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1792 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1818
 slab_free mm/slub.c:3801 [inline]
 kmem_cache_free+0xf0/0x490 mm/slub.c:3823
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:959
 __kfree_skb net/core/skbuff.c:1017 [inline]
 consume_skb net/core/skbuff.c:1232 [inline]
 consume_skb+0xdf/0x170 net/core/skbuff.c:1226
 netlink_broadcast+0x360/0xd90 net/netlink/af_netlink.c:1538
 nlmsg_multicast include/net/netlink.h:1083 [inline]
 nlmsg_notify+0x93/0x280 net/netlink/af_netlink.c:2592
 fdb_notify+0xf3/0x190 net/bridge/br_fdb.c:209
 br_fdb_update+0x330/0x790 net/bridge/br_fdb.c:900
 br_handle_frame_finish+0x7a1/0x1de0 net/bridge/br_input.c:138
 br_nf_hook_thresh+0x2fb/0x3f0 net/bridge/br_netfilter_hooks.c:1048
 br_nf_pre_routing_finish_ipv6+0x695/0xf30 net/bridge/br_netfilter_ipv6.c:148
 NF_HOOK include/linux/netfilter.h:303 [inline]
 br_nf_pre_routing_ipv6+0x41b/0x830 net/bridge/br_netfilter_ipv6.c:178
 br_nf_pre_routing+0xda4/0x1520 net/bridge/br_netfilter_hooks.c:508
 nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:272 [inline]
 br_handle_frame+0xac1/0x1440 net/bridge/br_input.c:417
 __netif_receive_skb_core+0xa10/0x3900 net/core/dev.c:5346
 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5450
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5566
 process_backlog+0x101/0x670 net/core/dev.c:5894
 __napi_poll+0xb7/0x6f0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x8a9/0xcb0 net/core/dev.c:6660
 __do_softirq+0x1d4/0x905 kernel/softirq.c:553
 do_softirq.part.0+0x87/0xc0 kernel/softirq.c:454
 </IRQ>
 <TASK>
 do_softirq kernel/softirq.c:446 [inline]
 __local_bh_enable_ip+0x106/0x130 kernel/softirq.c:381
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 cfg80211_inform_single_bss_frame_data+0x7a5/0xfe0 net/wireless/scan.c:2887
 cfg80211_inform_bss_frame_data+0xc2/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x371/0x9b0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1a1d/0x3080 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa4a/0xd70 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x253/0x330 net/wireless/core.c:435
 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>