INFO: task kworker/u4:0:8 blocked for more than 143 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:0 state:D stack:11296 pid: 8 ppid: 2 flags:0x00004000 Workqueue: cfg80211 cfg80211_event_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 cfg80211_event_work+0x9/0x20 net/wireless/core.c:319 process_one_work+0x26a/0x650 kernel/workqueue.c:2269 worker_thread+0x38/0x390 kernel/workqueue.c:2415 kthread+0x148/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/1:1:23 blocked for more than 143 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:12864 pid: 23 ppid: 2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 linkwatch_event+0x5/0x30 net/core/link_watch.c:250 process_one_work+0x26a/0x650 kernel/workqueue.c:2269 worker_thread+0x38/0x390 kernel/workqueue.c:2415 kthread+0x148/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/u4:2:27 blocked for more than 143 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:2 state:D stack:12320 pid: 27 ppid: 2 flags:0x00004000 Workqueue: tc_filter_workqueue rsvp_delete_filter_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 rsvp_delete_filter_work+0x9/0x20 net/sched/cls_rsvp.h:293 process_one_work+0x26a/0x650 kernel/workqueue.c:2269 worker_thread+0x38/0x390 kernel/workqueue.c:2415 kthread+0x148/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/1:2:3062 blocked for more than 143 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:13320 pid: 3062 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 addrconf_dad_work+0x3f/0x4f0 net/ipv6/addrconf.c:4027 process_one_work+0x26a/0x650 kernel/workqueue.c:2269 worker_thread+0x38/0x390 kernel/workqueue.c:2415 kthread+0x148/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/0:3:8625 blocked for more than 143 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:12336 pid: 8625 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 addrconf_dad_work+0x3f/0x4f0 net/ipv6/addrconf.c:4027 process_one_work+0x26a/0x650 kernel/workqueue.c:2269 worker_thread+0x38/0x390 kernel/workqueue.c:2415 kthread+0x148/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.3:8791 blocked for more than 144 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:11312 pid: 8791 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x220/0x2d0 net/netlink/genetlink.c:729 netlink_rcv_skb+0x41/0x110 net/netlink/af_netlink.c:2470 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:742 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x276/0x4c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 __sys_sendto+0xec/0x160 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0x1f/0x30 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417c97 Code: Bad RIP value. RSP: 002b:00007fff3a800d30 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 RDX: 0000000000000028 RSI: 00000000016b4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff3a800d40 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fff3a800da4 R13: 0000000000000010 R14: 00000000016b4350 R15: 0000000000000003 INFO: task syz-executor.2:8792 blocked for more than 144 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:11376 pid: 8792 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 netlink_rcv_skb+0x41/0x110 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x276/0x4c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 __sys_sendto+0xec/0x160 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0x1f/0x30 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417c97 Code: Bad RIP value. RSP: 002b:00007ffdf0212780 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 RDX: 0000000000000028 RSI: 00000000016b4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffdf0212790 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016b4350 R15: 0000000000000003 INFO: task syz-executor.4:8794 blocked for more than 144 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:11200 pid: 8794 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 netlink_rcv_skb+0x41/0x110 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x276/0x4c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 __sys_sendto+0xec/0x160 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0x1f/0x30 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417c97 Code: Bad RIP value. RSP: 002b:00007ffd0c113eb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 RDX: 0000000000000028 RSI: 00000000016b4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd0c113ec0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016b4350 R15: 0000000000000003 INFO: task syz-executor.1:8799 blocked for more than 144 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:11376 pid: 8799 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 wiphy_register+0x859/0xaa0 net/wireless/core.c:911 ieee80211_register_hw+0x683/0xdc0 net/mac80211/main.c:1279 mac80211_hwsim_new_radio+0xada/0x1730 drivers/net/wireless/mac80211_hwsim.c:3183 hwsim_new_radio_nl+0x302/0x570 drivers/net/wireless/mac80211_hwsim.c:3744 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline] genl_rcv_msg+0x1e3/0x2d0 net/netlink/genetlink.c:731 netlink_rcv_skb+0x41/0x110 net/netlink/af_netlink.c:2470 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:742 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x276/0x4c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 __sys_sendto+0xec/0x160 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0x1f/0x30 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417c97 Code: Bad RIP value. RSP: 002b:00007ffe77b17cb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 RDX: 0000000000000024 RSI: 00000000016b4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffe77b17cc0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016b4350 R15: 0000000000000003 INFO: task syz-executor.5:8800 blocked for more than 145 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:11216 pid: 8800 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x3af/0x9e0 kernel/sched/core.c:4527 schedule+0x37/0xe0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4a4/0xa30 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 netlink_rcv_skb+0x41/0x110 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x276/0x4c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 __sys_sendto+0xec/0x160 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0x1f/0x30 net/socket.c:2000 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417c97 Code: Bad RIP value. RSP: 002b:00007ffc51892ce0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 RDX: 0000000000000028 RSI: 00000000016b4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc51892cf0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016b4350 R15: 0000000000000003 Showing all locks held in the system: 3 locks held by kworker/u4:0/8: #0: ffff88813aa50938 ((wq_completion)cfg80211){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff88813aa50938 ((wq_completion)cfg80211){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88813aa50938 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #1: ffffc90000c97e70 ((work_completion)(&rdev->event_work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90000c97e70 ((work_completion)(&rdev->event_work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90000c97e70 ((work_completion)(&rdev->event_work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: cfg80211_event_work+0x9/0x20 net/wireless/core.c:319 3 locks held by kworker/1:1/23: #0: ffff88813b856738 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff88813b856738 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88813b856738 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #1: ffffc90000d1be70 ((linkwatch_work).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90000d1be70 ((linkwatch_work).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90000d1be70 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x30 net/core/link_watch.c:250 3 locks held by kworker/u4:2/27: #0: ffff888139cff938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888139cff938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888139cff938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #1: ffffc90000d4be70 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90000d4be70 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90000d4be70 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rsvp_delete_filter_work+0x9/0x20 net/sched/cls_rsvp.h:293 1 lock held by khungtaskd/1201: #0: ffffffff84f43180 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0x1a6 kernel/locking/lockdep.c:5853 3 locks held by kworker/0:2/2977: #0: ffff88813b856f38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff88813b856f38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88813b856f38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #1: ffffc900067efe70 ((reg_check_chans).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc900067efe70 ((reg_check_chans).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc900067efe70 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x28/0x4e0 net/wireless/reg.c:2199 3 locks held by kworker/1:2/3062: #0: ffff888237347138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888237347138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888237347138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #1: ffffc90006acfe70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90006acfe70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90006acfe70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x3f/0x4f0 net/ipv6/addrconf.c:4027 1 lock held by in:imklog/8009: #0: ffff888133a598f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x45/0x50 fs/file.c:930 3 locks held by kworker/0:3/8625: #0: ffff888237347138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888237347138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888237347138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #1: ffffc90001217e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90001217e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90001217e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x650 kernel/workqueue.c:2240 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x3f/0x4f0 net/ipv6/addrconf.c:4027 2 locks held by syz-executor.3/8791: #0: ffffffff85582bf0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:741 #1: ffffffff85582c88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff85582c88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x220/0x2d0 net/netlink/genetlink.c:729 1 lock held by syz-executor.2/8792: #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 1 lock held by syz-executor.4/8794: #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 3 locks held by syz-executor.1/8799: #0: ffffffff85582bf0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:741 #1: ffffffff85582c88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff85582c88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x220/0x2d0 net/netlink/genetlink.c:729 #2: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: wiphy_register+0x859/0xaa0 net/wireless/core.c:911 1 lock held by syz-executor.5/8800: #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 1 lock held by syz-executor.0/10125: 1 lock held by syz-executor.0/10134: #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: tc_new_tfilter+0x391/0xc80 net/sched/cls_api.c:2020 1 lock held by syz-executor.0/10139: #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8555a3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x15e/0x4c0 net/core/rtnetlink.c:5560 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1201 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x77/0xa0 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.7+0x2e/0x33 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xd5/0xec lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0x600/0x7b0 kernel/hung_task.c:295 kthread+0x148/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10125 Comm: syz-executor.0 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x641/0x3590 kernel/locking/lockdep.c:4351 Code: ff 41 89 dc 49 83 fc 01 0f 87 5e 23 00 00 4b 8b 44 e6 08 48 85 c0 0f 85 63 fa ff ff e9 35 fa ff ff 48 8d 74 38 d8 0f b7 4e 20 <81> e1 ff 1f 00 00 39 d9 0f 85 a2 fa ff ff 48 83 3c 24 00 0f 84 97 RSP: 0018:ffffc90002ee33f0 EFLAGS: 00000002 RAX: 0000000000000028 RBX: 0000000000000919 RCX: 00000000000000ea RDX: 0000000000000000 RSI: ffff88811f2f3ae8 RDI: ffff88811f2f3ae8 RBP: ffff88811f2f3200 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888131bd2168 R15: 0000000000000000 FS: 00007f24b0549700(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbb73354fcc CR3: 000000011d5b7000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0xb0/0x410 kernel/locking/lockdep.c:5029 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x94/0xa30 kernel/locking/mutex.c:1103 tcf_idr_check_alloc+0x43/0x120 net/sched/act_api.c:499 tcf_police_init+0x180/0x800 net/sched/act_police.c:81 tcf_action_init_1+0x10f/0x540 net/sched/act_api.c:998 tcf_exts_validate+0x58/0xe0 net/sched/cls_api.c:3058 rsvp_change+0x15d/0x112e net/sched/cls_rsvp.h:508 tc_new_tfilter+0x923/0xc80 net/sched/cls_api.c:2129 rtnetlink_rcv_msg+0x38d/0x4c0 net/core/rtnetlink.c:5554 netlink_rcv_skb+0x41/0x110 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x276/0x4c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 ____sys_sendmsg+0x1ed/0x240 net/socket.c:2353 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407 __sys_sendmsg+0x52/0xa0 net/socket.c:2440 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f24b0548c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000006 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd0f9d5a7f R14: 00007f24b05499c0 R15: 000000000119bf8c