INFO: task kworker/1:0:17 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/1:0 state:D stack:13208 pid: 17 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 addrconf_dad_work+0x3f/0x500 net/ipv6/addrconf.c:4027 process_one_work+0x26a/0x5f0 kernel/workqueue.c:2269 worker_thread+0x38/0x380 kernel/workqueue.c:2415 kthread+0x147/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/u4:4:551 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/u4:4 state:D stack:12440 pid: 551 ppid: 2 flags:0x00004000 Workqueue: cfg80211 cfg80211_event_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 cfg80211_event_work+0x9/0x20 net/wireless/core.c:319 process_one_work+0x26a/0x5f0 kernel/workqueue.c:2269 worker_thread+0x38/0x380 kernel/workqueue.c:2415 kthread+0x147/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/0:2:2985 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/0:2 state:D stack:12472 pid: 2985 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 addrconf_dad_work+0x3f/0x500 net/ipv6/addrconf.c:4027 process_one_work+0x26a/0x5f0 kernel/workqueue.c:2269 worker_thread+0x38/0x380 kernel/workqueue.c:2415 kthread+0x147/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/1:2:3030 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:13336 pid: 3030 ppid: 2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 linkwatch_event+0x5/0x30 net/core/link_watch.c:250 process_one_work+0x26a/0x5f0 kernel/workqueue.c:2269 worker_thread+0x38/0x380 kernel/workqueue.c:2415 kthread+0x147/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.4:8855 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:syz-executor.4 state:D stack:11136 pid: 8855 ppid: 1 flags:0x20024004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x14a/0x480 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+0x248/0x480 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_compat_sys_socketcall net/compat.c:476 [inline] __se_compat_sys_socketcall net/compat.c:424 [inline] __ia32_compat_sys_socketcall+0x256/0x380 net/compat.c:424 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fd2549 Code: Bad RIP value. RSP: 002b:00000000fffea8a0 EFLAGS: 00000282 ORIG_RAX: 0000000000000066 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000fffea8b8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000fffea968 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.3:8857 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:11320 pid: 8857 ppid: 1 flags:0x20024004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x14a/0x480 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+0x248/0x480 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_compat_sys_socketcall net/compat.c:476 [inline] __se_compat_sys_socketcall net/compat.c:424 [inline] __ia32_compat_sys_socketcall+0x256/0x380 net/compat.c:424 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f70549 Code: Bad RIP value. RSP: 002b:00000000ff94f800 EFLAGS: 00000282 ORIG_RAX: 0000000000000066 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000ff94f818 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:8861 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:11272 pid: 8861 ppid: 1 flags:0x20020004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x14a/0x480 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+0x248/0x480 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_compat_sys_socketcall net/compat.c:476 [inline] __se_compat_sys_socketcall net/compat.c:424 [inline] __ia32_compat_sys_socketcall+0x256/0x380 net/compat.c:424 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fb6549 Code: Bad RIP value. RSP: 002b:00000000ffd77fc0 EFLAGS: 00000282 ORIG_RAX: 0000000000000066 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000ffd77fd8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.0:8862 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.0 state:D stack:11544 pid: 8862 ppid: 1 flags:0x20020004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x14a/0x480 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+0x248/0x480 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_compat_sys_socketcall net/compat.c:476 [inline] __se_compat_sys_socketcall net/compat.c:424 [inline] __ia32_compat_sys_socketcall+0x256/0x380 net/compat.c:424 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fdd549 Code: Bad RIP value. RSP: 002b:00000000ff84c3f0 EFLAGS: 00000282 ORIG_RAX: 0000000000000066 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000ff84c408 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.5:8863 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.5 state:D stack:11160 pid: 8863 ppid: 1 flags:0x20020004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 nl80211_pre_doit+0xf9/0x1b0 net/wireless/nl80211.c:14304 genl_family_rcv_msg_doit net/netlink/genetlink.c:664 [inline] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline] genl_rcv_msg+0x1b8/0x2ef 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+0x248/0x480 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_compat_sys_socketcall net/compat.c:476 [inline] __se_compat_sys_socketcall net/compat.c:424 [inline] __ia32_compat_sys_socketcall+0x256/0x380 net/compat.c:424 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f3d549 Code: Bad RIP value. RSP: 002b:00000000ffadceb0 EFLAGS: 00000286 ORIG_RAX: 0000000000000066 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000ffadcec8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.2:10216 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.2 state:D stack:13544 pid:10216 ppid: 8853 flags:0x20024004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x381/0x8d0 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+0x472/0x9f0 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x14a/0x480 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+0x248/0x480 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 ____sys_sendmsg+0x124/0x230 net/socket.c:2353 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407 __sys_sendmmsg+0x13b/0x1e0 net/socket.c:2490 __compat_sys_sendmmsg net/compat.c:361 [inline] __do_compat_sys_sendmmsg net/compat.c:368 [inline] __se_compat_sys_sendmmsg net/compat.c:365 [inline] __ia32_compat_sys_sendmmsg+0x1c/0x20 net/compat.c:365 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fd2549 Code: Bad RIP value. RSP: 002b:00000000f778a0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000159 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000200 RDX: 00000000924926d3 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 3 locks held by kworker/1:0/17: #0: ffff888237067138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888237067138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888237067138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #1: ffffc90000ce7e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90000ce7e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90000ce7e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #2: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x3f/0x500 net/ipv6/addrconf.c:4027 3 locks held by kworker/u4:4/551: #0: ffff88813aa25538 ((wq_completion)cfg80211){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff88813aa25538 ((wq_completion)cfg80211){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88813aa25538 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #1: ffffc900015fbe70 ((work_completion)(&rdev->event_work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc900015fbe70 ((work_completion)(&rdev->event_work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc900015fbe70 ((work_completion)(&rdev->event_work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #2: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: cfg80211_event_work+0x9/0x20 net/wireless/core.c:319 1 lock held by khungtaskd/1546: #0: ffffffff84b0eea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0x17a kernel/locking/lockdep.c:5853 3 locks held by kworker/0:2/2985: #0: ffff888237067138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888237067138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888237067138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #1: ffffc90006523e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90006523e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90006523e70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #2: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x3f/0x500 net/ipv6/addrconf.c:4027 3 locks held by kworker/1:2/3030: #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/0x5f0 kernel/workqueue.c:2240 #1: ffffc90006593e70 ((linkwatch_work).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90006593e70 ((linkwatch_work).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90006593e70 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #2: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x30 net/core/link_watch.c:250 1 lock held by in:imklog/8040: #0: ffff88812de112f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x45/0x50 fs/file.c:930 3 locks held by kworker/0:4/8678: #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/0x5f0 kernel/workqueue.c:2240 #1: ffffc900011a3e70 ((reg_check_chans).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc900011a3e70 ((reg_check_chans).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc900011a3e70 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x1de/0x5f0 kernel/workqueue.c:2240 #2: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x28/0x4b0 net/wireless/reg.c:2199 1 lock held by syz-executor.4/8855: #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5560 1 lock held by syz-executor.3/8857: #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5560 1 lock held by syz-executor.1/8861: #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5560 1 lock held by syz-executor.0/8862: #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5560 2 locks held by syz-executor.5/8863: #0: ffffffff84f422b0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:741 #1: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0xf9/0x1b0 net/wireless/nl80211.c:14304 2 locks held by syz-executor.2/10187: 1 lock held by syz-executor.2/10216: #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84f2a408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5560 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1546 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.8+0x3e/0x58 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+0x58e/0x680 kernel/hung_task.c:295 kthread+0x147/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10187 Comm: syz-executor.2 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_lockdep_current_cpu_online+0x4c/0x90 kernel/rcu/tree.c:1160 Code: 06 48 83 c4 08 5b c3 65 ff 05 90 96 db 7e e8 6b ff 2d 02 48 c7 c3 40 d6 02 00 89 c0 48 83 f8 07 77 27 48 03 1c c5 c0 36 78 84 <48> 8b 43 18 48 8b 40 70 48 85 43 20 0f 95 c0 65 ff 0d 5e 96 db 7e RSP: 0018:ffffc900027cb420 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff88813bc2d640 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff846be3e6 RDI: ffffffff8445c831 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88812f507fd8 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88812f507f68 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88813bc00000(0063) knlGS:00000000f77ccb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007f0f714a0020 CR3: 000000011c8cf000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common+0x25/0x40 kernel/rcu/update.c:123 rcu_read_lock_sched_held+0x1e/0x80 kernel/rcu/update.c:134 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x346/0x3c0 kernel/locking/lockdep.c:5003 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x94/0x9f0 kernel/locking/mutex.c:1103 tcf_idr_check_alloc+0x43/0x120 net/sched/act_api.c:499 tcf_police_init+0x175/0x740 net/sched/act_police.c:81 tcf_action_init_1+0xfd/0x4f0 net/sched/act_api.c:998 tcf_exts_validate+0x58/0xe0 net/sched/cls_api.c:3058 rsvp_change+0x114/0xe30 net/sched/cls_rsvp.h:502 tc_new_tfilter+0x8d2/0xcf0 net/sched/cls_api.c:2129 rtnetlink_rcv_msg+0x352/0x480 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+0x248/0x480 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x2b/0x40 net/socket.c:671 ____sys_sendmsg+0x124/0x230 net/socket.c:2353 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407 __sys_sendmmsg+0x13b/0x1e0 net/socket.c:2490 __compat_sys_sendmmsg net/compat.c:361 [inline] __do_compat_sys_sendmmsg net/compat.c:368 [inline] __se_compat_sys_sendmmsg net/compat.c:365 [inline] __ia32_compat_sys_sendmmsg+0x1c/0x20 net/compat.c:365 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fd2549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f77cc0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000159 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000200 RDX: 00000000924926d3 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000