INFO: task kworker/0:2:2484 blocked for more than 143 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:13216 pid: 2484 ppid: 2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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+0x273/0x600 kernel/workqueue.c:2272 worker_thread+0x38/0x380 kernel/workqueue.c:2418 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/1:3:3336 blocked for more than 143 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:13512 pid: 3336 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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+0x273/0x600 kernel/workqueue.c:2272 worker_thread+0x38/0x380 kernel/workqueue.c:2418 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.0:6170 blocked for more than 143 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:11224 pid: 6170 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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:5559 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494 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_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: 0033:0x4178d7 RSP: 002b:00007ffc3180a4c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016a4300 RCX: 00000000004178d7 RDX: 0000000000000028 RSI: 00000000016a4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc3180a4d0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016a4350 R15: 0000000000000003 INFO: task syz-executor.5:6175 blocked for more than 143 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:11776 pid: 6175 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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:5559 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494 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_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: 0033:0x4178d7 RSP: 002b:00007ffec02380e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016a4300 RCX: 00000000004178d7 RDX: 0000000000000040 RSI: 00000000016a4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffec02380f0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016a4350 R15: 0000000000000003 INFO: task syz-executor.4:6177 blocked for more than 144 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:11800 pid: 6177 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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:5559 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494 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_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: 0033:0x4178d7 RSP: 002b:00007fffe70d5df0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016a4300 RCX: 00000000004178d7 RDX: 000000000000002c RSI: 00000000016a4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffe70d5e00 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016a4350 R15: 0000000000000003 INFO: task syz-executor.1:6178 blocked for more than 144 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:11800 pid: 6178 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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:5559 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494 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_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: 0033:0x4178d7 RSP: 002b:00007ffea97b7bb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016a4300 RCX: 00000000004178d7 RDX: 0000000000000040 RSI: 00000000016a4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffea97b7bc0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016a4350 R15: 0000000000000003 INFO: task syz-executor.3:6179 blocked for more than 144 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:11568 pid: 6179 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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:5559 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494 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_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: 0033:0x4178d7 RSP: 002b:00007fff8be0ee50 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016a4300 RCX: 00000000004178d7 RDX: 0000000000000028 RSI: 00000000016a4350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff8be0ee60 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016a4350 R15: 0000000000000003 INFO: task kworker/0:4:6227 blocked for more than 144 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:13184 pid: 6227 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __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+0x273/0x600 kernel/workqueue.c:2272 worker_thread+0x38/0x380 kernel/workqueue.c:2418 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/0:5:7487 blocked for more than 144 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:5 state:D stack:13544 pid: 7487 ppid: 2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 reg_check_chans_work+0x23/0x490 net/wireless/reg.c:2404 process_one_work+0x273/0x600 kernel/workqueue.c:2272 worker_thread+0x38/0x380 kernel/workqueue.c:2418 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.2:7513 blocked for more than 144 seconds. Not tainted 5.10.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:12504 pid: 7513 ppid: 6169 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4528 schedule+0x38/0xe0 kernel/sched/core.c:4606 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4665 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 tcf_action_init_1+0x238/0x4b0 net/sched/act_api.c:968 tcf_action_init+0xcf/0x1f0 net/sched/act_api.c:1043 tcf_action_add+0x7d/0x190 net/sched/act_api.c:1456 tc_ctl_action+0xdb/0x140 net/sched/act_api.c:1509 rtnetlink_rcv_msg+0x173/0x480 net/core/rtnetlink.c:5562 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494 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+0x1ed/0x230 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: 0033:0x45de59 RSP: 002b:00007f0665c44c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002e600 RCX: 000000000045de59 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffdaf52c1cf R14: 00007f0665c459c0 R15: 000000000118bf2c Showing all locks held in the system: 1 lock held by khungtaskd/1180: #0: ffffffff847fbf40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0x17a kernel/locking/lockdep.c:6255 3 locks held by kworker/0:2/2484: #0: ffff888100055738 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888100055738 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888100055738 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #1: ffffc9000476fe70 ((linkwatch_work).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc9000476fe70 ((linkwatch_work).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc9000476fe70 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #2: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x30 net/core/link_watch.c:250 3 locks held by kworker/1:3/3336: #0: ffff888106a7eb38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888106a7eb38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888106a7eb38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #1: ffffc90005b2be70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90005b2be70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90005b2be70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #2: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x3f/0x500 net/ipv6/addrconf.c:4027 1 lock held by in:imklog/5786: #0: ffff88810af350f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x45/0x50 fs/file.c:932 1 lock held by syz-executor.0/6170: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5559 1 lock held by syz-executor.5/6175: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5559 1 lock held by syz-executor.4/6177: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5559 1 lock held by syz-executor.1/6178: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5559 1 lock held by syz-executor.3/6179: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5559 3 locks held by kworker/0:4/6227: #0: ffff888106a7eb38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888106a7eb38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888106a7eb38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #1: ffffc9000052be70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc9000052be70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc9000052be70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #2: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x3f/0x500 net/ipv6/addrconf.c:4027 3 locks held by kworker/0:5/7487: #0: ffff888100055f38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff888100055f38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888100055f38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #1: ffffc90001fdbe70 ((reg_check_chans).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #1: ffffc90001fdbe70 ((reg_check_chans).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #1: ffffc90001fdbe70 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x1e6/0x600 kernel/workqueue.c:2243 #2: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x23/0x490 net/wireless/reg.c:2404 1 lock held by syz-executor.2/7513: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x238/0x4b0 net/sched/act_api.c:968 2 locks held by syz-executor.2/7517: 1 lock held by syz-executor.2/7523: #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff84b63928 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x14a/0x480 net/core/rtnetlink.c:5559 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1180 Comm: khungtaskd Not tainted 5.10.0-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+0xa3/0xc8 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.8+0x53/0x6d lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0xd5/0xf0 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+0x57f/0x670 kernel/hung_task.c:294 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2831 Comm: kworker/u4:5 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:648 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:670 [inline] RIP: 0010:lock_acquire+0x88/0x420 kernel/locking/lockdep.c:5433 Code: d6 00 00 00 65 8b 05 d7 47 dc 7e 85 c0 0f 85 8e 01 00 00 65 48 8b 04 25 c0 7e 01 00 8b 90 14 09 00 00 85 d2 0f 85 77 01 00 00 <48> 83 3d 30 fc 48 03 00 0f 84 4c 02 00 00 9c 58 0f 1f 44 00 00 48 RSP: 0018:ffffc90004cf7db0 EFLAGS: 00000246 RAX: ffff888105d84240 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff840a2807 RDI: 0000000000000282 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffff888105d84b58 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff847fbf40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9449b89000 CR3: 0000000116bfc003 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:248 [inline] rcu_read_lock include/linux/rcupdate.h:641 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline] batadv_nc_worker+0x66/0x240 net/batman-adv/network-coding.c:718 process_one_work+0x273/0x600 kernel/workqueue.c:2272 worker_thread+0x38/0x380 kernel/workqueue.c:2418 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296