INFO: task kworker/0:16:12601 blocked for more than 143 seconds. Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:16 state:D stack:26760 pid:12601 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: 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_dad_work+0xa7/0x1390 net/ipv6/addrconf.c:4088 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 INFO: task kworker/u4:3:12796 blocked for more than 143 seconds. Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:3 state:D stack:25408 pid:12796 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: 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 wg_destruct+0x29/0x400 drivers/net/wireguard/device.c:247 netdev_run_todo+0x6bf/0x1100 net/core/dev.c:10358 default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11360 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 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 INFO: task syz-executor.5:15627 blocked for more than 144 seconds. Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:25088 pid:15627 ppid:1 flags:0x00004004 Call Trace: 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: 0033:0x7ff179a3e2ac RSP: 002b:00007ffcae3f4c70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ff17a6d4620 RCX: 00007ff179a3e2ac RDX: 0000000000000024 RSI: 00007ff17a6d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffcae3f4cc4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ff17a6d4670 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.2:15636 blocked for more than 146 seconds. Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:25088 pid:15636 ppid:1 flags:0x00000004 Call Trace: 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 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x51a/0x7e0 net/netlink/genetlink.c:1065 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: 0033:0x7f3be6a3e2ac RSP: 002b:00007ffe7d0ff760 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f3be76d4620 RCX: 00007f3be6a3e2ac RDX: 0000000000000028 RSI: 00007f3be76d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffe7d0ff7b4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe7d0ff808 R13: 00007f3be76d4670 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.5:15708 blocked for more than 147 seconds. Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28464 pid:15708 ppid:1 flags:0x00000004 Call Trace: 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 rtnl_lock net/core/rtnetlink.c:78 [inline] rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2549 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: 0033:0x7f256103e2ac RSP: 002b:00007fff904a1020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2561cd4620 RCX: 00007f256103e2ac RDX: 0000000000000028 RSI: 00007f2561cd4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff904a1074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f2561cd4670 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.2:15712 blocked for more than 148 seconds. Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28352 pid:15712 ppid:1 flags:0x00000004 Call Trace: 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 rtnl_lock net/core/rtnetlink.c:78 [inline] rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2549 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: 0033:0x7f2bb543e2ac RSP: 002b:00007fff1c37b0c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2bb60d4620 RCX: 00007f2bb543e2ac RDX: 0000000000000028 RSI: 00007f2bb60d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff1c37b114 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f2bb60d4670 R14: 0000000000000003 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8c9a0ab0 (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/13: #0: ffffffff8c9a07b0 (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/27: #0: ffffffff8c9a16c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 2 locks held by getty/4764: #0: ffff88801ec90098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900020382f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf08/0x13f0 drivers/tty/n_tty.c:2187 3 locks held by kworker/1:4/5116: #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567 #1: ffffc9000479fdb0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571 #2: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630 4 locks held by kworker/1:6/5178: 4 locks held by kworker/1:7/5197: 6 locks held by kworker/1:9/6287: 4 locks held by kworker/1:0/11127: 3 locks held by kworker/0:16/12601: #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff88814a98dd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567 #1: ffffc9000953fdb0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571 #2: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa7/0x1390 net/ipv6/addrconf.c:4088 4 locks held by kworker/u4:3/12796: #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff888017a51138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567 #1: ffffc9000b347db0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571 #2: ffffffff8e3b1650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:576 #3: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: wg_destruct+0x29/0x400 drivers/net/wireguard/device.c:247 3 locks held by kworker/1:3/15543: 4 locks held by syz-executor.5/15627: #0: ffffffff8e45ea90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1077 #1: ffffffff8e45eb48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e45eb48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x51a/0x7e0 net/netlink/genetlink.c:1065 #2: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: wiphy_register+0x1f53/0x2ad0 net/wireless/core.c:962 #3: ffff888072290768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5773 [inline] #3: ffff888072290768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_process_self_managed_hints+0x78/0x170 net/wireless/reg.c:3181 2 locks held by syz-executor.2/15636: #0: ffffffff8e45ea90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1077 #1: ffffffff8e45eb48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8e45eb48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x51a/0x7e0 net/netlink/genetlink.c:1065 1 lock held by syz-executor.5/15708: #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 1 lock held by syz-executor.2/15712: #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 1 lock held by syz-executor.5/15716: #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 1 lock held by syz-executor.2/15721: #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 1 lock held by syz-executor.5/15731: #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 1 lock held by syz-executor.2/15735: #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e3c5928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6421 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __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 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 11127 Comm: kworker/1:0 Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: events cfg80211_wiphy_work RIP: 0010:match_held_lock+0x70/0xc0 kernel/locking/lockdep.c:5237 Code: 04 48 0f af c2 0f b7 53 20 81 e2 ff 1f 00 00 48 39 d0 0f 94 c0 48 83 c4 08 0f b6 c0 5b c3 31 f6 e8 65 fe ff ff 48 85 c0 75 b2 <31> c0 48 83 c4 08 5b c3 48 83 c4 08 b8 01 00 00 00 5b c3 e8 08 db RSP: 0018:ffffc900003e7a98 EFLAGS: 00000046 RAX: 000000000000000f RBX: ffff88807e9e8d40 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8e3c5928 RDI: ffff88807e9e8d40 RBP: ffffffff8e3c5928 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88807e9e8200 R13: ffff88807e9e8cc8 R14: 00000000ffffffff R15: ffff88807e9e8d40 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0d02f385b0 CR3: 000000007665c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_is_held kernel/locking/lockdep.c:5502 [inline] lock_is_held_type+0xab/0x140 kernel/locking/lockdep.c:5832 lock_is_held include/linux/lockdep.h:288 [inline] lockdep_rtnl_is_held+0x1b/0x30 net/core/rtnetlink.c:176 find_match.part.0+0x260/0xd80 include/net/addrconf.h:315 find_match net/ipv6/route.c:827 [inline] __find_rr_leaf+0x17f/0xdc0 net/ipv6/route.c:828 find_rr_leaf net/ipv6/route.c:849 [inline] rt6_select net/ipv6/route.c:893 [inline] fib6_table_lookup+0x62e/0xa20 net/ipv6/route.c:2181 ip6_pol_route+0x1c9/0x1230 net/ipv6/route.c:2217 pol_lookup_func include/net/ip6_fib.h:576 [inline] fib6_rule_lookup+0x115/0x6e0 net/ipv6/fib6_rules.c:116 ip6_route_input_lookup net/ipv6/route.c:2286 [inline] ip6_route_input+0x5d8/0xbb0 net/ipv6/route.c:2582 ip6_rcv_finish_core.constprop.0+0x1a4/0x5d0 net/ipv6/ip6_input.c:66 ip6_rcv_finish+0x130/0x2c0 net/ipv6/ip6_input.c:77 ip_sabotage_in+0x22a/0x2a0 net/bridge/br_netfilter_hooks.c:880 nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline] nf_hook_slow+0xc9/0x1f0 net/netfilter/core.c:626 nf_hook.constprop.0+0x408/0x710 include/linux/netfilter.h:258 NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0xa2/0x380 net/ipv6/ip6_input.c:309 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5452 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5566 netif_receive_skb_internal net/core/dev.c:5652 [inline] netif_receive_skb+0x133/0x7a0 net/core/dev.c:5711 NF_HOOK include/linux/netfilter.h:303 [inline] NF_HOOK include/linux/netfilter.h:297 [inline] br_pass_frame_up+0x303/0x430 net/bridge/br_input.c:68 br_handle_frame_finish+0xd1f/0x1de0 net/bridge/br_input.c:216 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 do_softirq kernel/softirq.c:446 [inline] __local_bh_enable_ip+0x106/0x130 kernel/softirq.c:381 spin_unlock_bh include/linux/spinlock.h:396 [inline] cfg80211_put_bss+0x1b4/0x280 net/wireless/scan.c:2959 ieee80211_rx_bss_put net/mac80211/scan.c:37 [inline] ieee80211_rx_bss_put+0x43/0x60 net/mac80211/scan.c:32 ieee80211_rx_bss_info net/mac80211/ibss.c:1196 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline] ieee80211_ibss_rx_queued_mgmt+0x1b5b/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