ieee802154 phy1 wpan1: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task kworker/u4:3:2844 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:3 D25256 2844 2 0x80000000 Workqueue: phy12 ieee80211_iface_work Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 sdata_lock net/mac80211/ieee80211_i.h:977 [inline] ieee80211_ibss_rx_queued_mgmt+0xe9/0x18b0 net/mac80211/ibss.c:1623 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task kworker/1:3:4699 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D26040 4699 2 0x80000000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 linkwatch_event+0xb/0x60 net/core/link_watch.c:236 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task kworker/0:4:9330 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:4 D25264 9330 2 0x80000000 Workqueue: events rfkill_global_led_trigger_worker Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:191 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.4:9869 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D25872 9869 8114 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 rfkill_fop_open+0x10d/0x6d0 net/rfkill/core.c:1129 misc_open+0x372/0x4a0 drivers/char/misc.c:141 chrdev_open+0x266/0x770 fs/char_dev.c:423 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007fe29f9f6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000002 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fff117a1a4f R14: 00007fe29f9f6300 R15: 0000000000022000 INFO: task syz-executor.4:9882 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D26592 9882 8114 0x00000006 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline] _synchronize_rcu_expedited+0x60c/0x6f0 kernel/rcu/tree_exp.h:667 synchronize_net+0x37/0x50 net/core/dev.c:9279 __sta_info_flush+0x389/0x540 net/mac80211/sta_info.c:1151 sta_info_flush net/mac80211/sta_info.h:773 [inline] ieee80211_ibss_disconnect+0x104/0xe40 net/mac80211/ibss.c:711 ieee80211_ibss_leave+0x12/0x150 net/mac80211/ibss.c:1858 rdev_leave_ibss net/wireless/rdev-ops.h:531 [inline] __cfg80211_leave_ibss+0x191/0x7c0 net/wireless/ibss.c:206 __cfg80211_leave+0x318/0x430 net/wireless/core.c:1079 cfg80211_leave net/wireless/core.c:1130 [inline] cfg80211_netdev_notifier_call+0xcb0/0x1aa0 net/wireless/core.c:1229 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers net/core/dev.c:1762 [inline] __dev_close_many+0xee/0x2e0 net/core/dev.c:1459 dev_close_many+0x24a/0x670 net/core/dev.c:1510 dev_close net/core/dev.c:1536 [inline] dev_close+0x179/0x220 net/core/dev.c:1530 cfg80211_shutdown_all_interfaces+0x12d/0x1d0 net/wireless/core.c:257 cfg80211_rfkill_set_block net/wireless/core.c:283 [inline] cfg80211_rfkill_set_block+0x2f/0x40 net/wireless/core.c:275 rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:353 rfkill_fop_write+0x250/0x4a0 net/rfkill/core.c:1249 __vfs_write+0xf7/0x770 fs/read_write.c:485 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007fe29f9d5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000007 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007fff117a1a4f R14: 00007fe29f9d5300 R15: 0000000000022000 INFO: task syz-executor.0:9983 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27408 9983 8106 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 setup_net+0x3d1/0x720 net/core/net_namespace.c:332 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:438 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2541 __do_sys_unshare kernel/fork.c:2609 [inline] __se_sys_unshare kernel/fork.c:2607 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2607 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007f5b59e24188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff60a745cf R14: 00007f5b59e24300 R15: 0000000000022000 INFO: task syz-executor.0:9988 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27696 9988 8106 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 tc_action_net_exit include/net/act_api.h:135 [inline] tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 setup_net+0x3d1/0x720 net/core/net_namespace.c:332 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:438 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2541 __do_sys_unshare kernel/fork.c:2609 [inline] __se_sys_unshare kernel/fork.c:2607 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2607 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007f5b59e03188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fff60a745cf R14: 00007f5b59e03300 R15: 0000000000022000 INFO: task syz-executor.1:9989 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28352 9989 8108 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 misc_open+0x55/0x4a0 drivers/char/misc.c:107 chrdev_open+0x266/0x770 fs/char_dev.c:423 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007fad8ad72188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000042 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcfa1d8eaf R14: 00007fad8ad72300 R15: 0000000000022000 INFO: task syz-executor.1:9995 blocked for more than 140 seconds. Not tainted 4.19.204-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28312 9995 8108 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083 misc_open+0x55/0x4a0 drivers/char/misc.c:107 chrdev_open+0x266/0x770 fs/char_dev.c:423 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007fad8ad51188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000042 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffcfa1d8eaf R14: 00007fad8ad51300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:1/23: #0: 000000009f2525ef (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9702 [inline] #0: 000000009f2525ef (&rq->lock){-.-.}, at: pick_next_task_fair+0x556/0x1570 kernel/sched/fair.c:6841 #1: 0000000058540106 (rcu_read_lock){....}, at: cpu_of kernel/sched/sched.h:921 [inline] #1: 0000000058540106 (rcu_read_lock){....}, at: __update_idle_core+0x39/0x3e0 kernel/sched/fair.c:6057 1 lock held by khungtaskd/1569: #0: 0000000058540106 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 3 locks held by kworker/u4:3/2844: #0: 0000000094b54e06 ((wq_completion)"%s"wiphy_name(local->hw.wiphy)){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000f5cbff49 ((work_completion)(&sdata->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: sdata_lock net/mac80211/ieee80211_i.h:977 [inline] #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: ieee80211_ibss_rx_queued_mgmt+0xe9/0x18b0 net/mac80211/ibss.c:1623 3 locks held by kworker/0:2/3386: #0: 000000009876bcd6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000cbf867ff ((addr_chk_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000003130ec0e (rtnl_mutex){+.+.}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4476 3 locks held by kworker/1:3/4699: #0: 000000009ddb1c7b ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000f2fd0743 ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000003130ec0e (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236 2 locks held by in:imklog/7800: #0: 00000000599b99fa (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 00000000bd9384af (logbuf_lock){-...}, at: is_bpf_text_address+0x0/0x1b0 kernel/bpf/core.c:532 3 locks held by syz-fuzzer/8081: #0: 00000000f31b307e (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline] #0: 00000000f31b307e (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 0000000058540106 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 0000000058540106 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 000000001e8e973d (&(ptlock_ptr(page))->rlock#2){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline] #2: 000000001e8e973d (&(ptlock_ptr(page))->rlock#2){+.+.}, at: map_pte mm/page_vma_mapped.c:51 [inline] #2: 000000001e8e973d (&(ptlock_ptr(page))->rlock#2){+.+.}, at: page_vma_mapped_walk+0x1172/0x27d0 mm/page_vma_mapped.c:254 3 locks held by kworker/0:3/9130: #0: 00000000a322acd4 ((wq_completion)"events_power_efficient"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000008ff53eb3 ((check_lifetime_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000003130ec0e (rtnl_mutex){+.+.}, at: check_lifetime+0x485/0x870 net/ipv4/devinet.c:716 3 locks held by kworker/0:4/9330: #0: 000000009ddb1c7b ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000d4b6b4a2 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000277b201f (rfkill_global_mutex){+.+.}, at: rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:191 2 locks held by syz-executor.4/9869: #0: 0000000068c1d969 (misc_mtx){+.+.}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107 #1: 00000000277b201f (rfkill_global_mutex){+.+.}, at: rfkill_fop_open+0x10d/0x6d0 net/rfkill/core.c:1129 4 locks held by syz-executor.4/9882: #0: 00000000277b201f (rfkill_global_mutex){+.+.}, at: rfkill_fop_write+0xfe/0x4a0 net/rfkill/core.c:1241 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: cfg80211_rfkill_set_block net/wireless/core.c:282 [inline] #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: cfg80211_rfkill_set_block+0x23/0x40 net/wireless/core.c:275 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: wdev_lock net/wireless/core.h:193 [inline] #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: cfg80211_leave net/wireless/core.c:1129 [inline] #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: cfg80211_netdev_notifier_call+0xca3/0x1aa0 net/wireless/core.c:1229 #3: 00000000bccc5f2d (&local->sta_mtx){+.+.}, at: __sta_info_flush+0x166/0x540 net/mac80211/sta_info.c:1140 2 locks held by syz-executor.0/9983: #0: 0000000094cf5911 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:434 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032 2 locks held by syz-executor.0/9988: #0: 0000000094cf5911 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:434 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: tc_action_net_exit include/net/act_api.h:135 [inline] #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591 1 lock held by syz-executor.1/9989: #0: 0000000068c1d969 (misc_mtx){+.+.}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107 1 lock held by syz-executor.1/9995: #0: 0000000068c1d969 (misc_mtx){+.+.}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.204-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+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 80 df 01 00 65 8b 15 6c 4c 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 RSP: 0018:ffff8880b5047c50 EFLAGS: 00000246 RAX: ffff8880b503c600 RBX: 0000000000000000 RCX: ffffffff87d8baed RDX: 0000000000000000 RSI: ffffffff83771f55 RDI: ffffffff88b3e020 RBP: ffffffff88b3e020 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88b3dfe0 R14: 000000000000014b R15: ffff8880a4b5bc00 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f45d54d8000 CR3: 00000000b3799000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x15/0x280 lib/smp_processor_id.c:13 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_unlock include/linux/rcupdate.h:677 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline] batadv_nc_worker+0x936/0xd50 net/batman-adv/network-coding.c:730 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 48 8b 34 24 mov (%rsp),%rsi c: 65 48 8b 04 25 80 df mov %gs:0x1df80,%rax 13: 01 00 15: 65 8b 15 6c 4c 9f 7e mov %gs:0x7e9f4c6c(%rip),%edx # 0x7e9f4c88 1c: 81 e2 00 01 1f 00 and $0x1f0100,%edx 22: 75 2b jne 0x4f 24: 8b 90 60 13 00 00 mov 0x1360(%rax),%edx * 2a: 83 fa 02 cmp $0x2,%edx <-- trapping instruction 2d: 75 20 jne 0x4f 2f: 48 8b 88 68 13 00 00 mov 0x1368(%rax),%rcx 36: 8b 80 64 13 00 00 mov 0x1364(%rax),%eax 3c: 48 8b 11 mov (%rcx),%rdx 3f: 48 rex.W