Bluetooth: hci6: command 0x0409 tx timeout Bluetooth: hci6: command 0x041b tx timeout Bluetooth: hci6: command 0x040f tx timeout Bluetooth: hci6: command 0x0419 tx timeout NOHZ: local_softirq_pending 08 INFO: task syz-executor.4:14015 blocked for more than 140 seconds. Not tainted 4.18.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28248 14015 13002 0x00080004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x80c/0x1fc0 kernel/sched/core.c:3501 schedule+0x7f/0x1b0 kernel/sched/core.c:3545 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3603 __mutex_lock_common kernel/locking/mutex.c:834 [inline] __mutex_lock+0x58a/0x1300 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 hci_inquiry+0x606/0x820 net/bluetooth/hci_core.c:1263 hci_sock_ioctl+0x1a3/0x620 net/bluetooth/hci_sock.c:1046 sock_do_ioctl+0xd9/0x230 net/socket.c:970 sock_ioctl+0x281/0x500 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: 00 84 c9 0f 85 f1 fd ff ff 83 3d 81 00 3a 01 00 0f 85 c2 00 00 00 48 8d 0d 8c 2e 43 00 48 89 88 a8 00 00 00 0f 57 c0 0f 11 84 <24> 90 00 00 00 48 8b 0d 13 db 36 01 48 89 8c 24 90 00 00 00 48 8d RSP: 002b:00007fe893d67188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 00000000200000c0 RSI: 00000000800448f0 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd0056a94f R14: 00007fe893d67300 R15: 0000000000022000 INFO: task syz-executor.4:14016 blocked for more than 140 seconds. Not tainted 4.18.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28248 14016 14015 0x00080004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x80c/0x1fc0 kernel/sched/core.c:3501 schedule+0x7f/0x1b0 kernel/sched/core.c:3545 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3603 __mutex_lock_common kernel/locking/mutex.c:834 [inline] __mutex_lock+0x58a/0x1300 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 hci_inquiry+0x606/0x820 net/bluetooth/hci_core.c:1263 hci_sock_ioctl+0x1a3/0x620 net/bluetooth/hci_sock.c:1046 sock_do_ioctl+0xd9/0x230 net/socket.c:970 sock_ioctl+0x281/0x500 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: 00 84 c9 0f 85 f1 fd ff ff 83 3d 81 00 3a 01 00 0f 85 c2 00 00 00 48 8d 0d 8c 2e 43 00 48 89 88 a8 00 00 00 0f 57 c0 0f 11 84 <24> 90 00 00 00 48 8b 0d 13 db 36 01 48 89 8c 24 90 00 00 00 48 8d RSP: 002b:00007fe893d67188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 00000000200000c0 RSI: 00000000800448f0 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd0056a94f R14: 00007fe893d67300 R15: 0000000000022000 INFO: task syz-executor.2:14048 blocked for more than 140 seconds. Not tainted 4.18.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28248 14048 13004 0x00080004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x80c/0x1fc0 kernel/sched/core.c:3501 schedule+0x7f/0x1b0 kernel/sched/core.c:3545 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3603 __mutex_lock_common kernel/locking/mutex.c:834 [inline] __mutex_lock+0x58a/0x1300 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 hci_inquiry+0x606/0x820 net/bluetooth/hci_core.c:1263 hci_sock_ioctl+0x1a3/0x620 net/bluetooth/hci_sock.c:1046 sock_do_ioctl+0xd9/0x230 net/socket.c:970 sock_ioctl+0x281/0x500 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: 00 84 c9 0f 85 f1 fd ff ff 83 3d 81 00 3a 01 00 0f 85 c2 00 00 00 48 8d 0d 8c 2e 43 00 48 89 88 a8 00 00 00 0f 57 c0 0f 11 84 <24> 90 00 00 00 48 8b 0d 13 db 36 01 48 89 8c 24 90 00 00 00 48 8d RSP: 002b:00007fb8d46ae188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 00000000200000c0 RSI: 00000000800448f0 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff69d7238f R14: 00007fb8d46ae300 R15: 0000000000022000 INFO: task syz-executor.2:14049 blocked for more than 140 seconds. Not tainted 4.18.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28248 14049 14048 0x00080004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x80c/0x1fc0 kernel/sched/core.c:3501 schedule+0x7f/0x1b0 kernel/sched/core.c:3545 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3603 __mutex_lock_common kernel/locking/mutex.c:834 [inline] __mutex_lock+0x58a/0x1300 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 hci_inquiry+0x606/0x820 net/bluetooth/hci_core.c:1263 hci_sock_ioctl+0x1a3/0x620 net/bluetooth/hci_sock.c:1046 sock_do_ioctl+0xd9/0x230 net/socket.c:970 sock_ioctl+0x281/0x500 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: 00 84 c9 0f 85 f1 fd ff ff 83 3d 81 00 3a 01 00 0f 85 c2 00 00 00 48 8d 0d 8c 2e 43 00 48 89 88 a8 00 00 00 0f 57 c0 0f 11 84 <24> 90 00 00 00 48 8b 0d 13 db 36 01 48 89 8c 24 90 00 00 00 48 8d RSP: 002b:00007fb8d46ae188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 00000000200000c0 RSI: 00000000800448f0 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff69d7238f R14: 00007fb8d46ae300 R15: 0000000000022000 INFO: task syz-executor.1:14064 blocked for more than 140 seconds. Not tainted 4.18.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28248 14064 13006 0x00080004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x80c/0x1fc0 kernel/sched/core.c:3501 schedule+0x7f/0x1b0 kernel/sched/core.c:3545 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3603 __mutex_lock_common kernel/locking/mutex.c:834 [inline] __mutex_lock+0x58a/0x1300 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 hci_inquiry+0x606/0x820 net/bluetooth/hci_core.c:1263 hci_sock_ioctl+0x1a3/0x620 net/bluetooth/hci_sock.c:1046 sock_do_ioctl+0xd9/0x230 net/socket.c:970 sock_ioctl+0x281/0x500 net/socket.c:1094 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: 00 84 c9 0f 85 f1 fd ff ff 83 3d 81 00 3a 01 00 0f 85 c2 00 00 00 48 8d 0d 8c 2e 43 00 48 89 88 a8 00 00 00 0f 57 c0 0f 11 84 <24> 90 00 00 00 48 8b 0d 13 db 36 01 48 89 8c 24 90 00 00 00 48 8d RSP: 002b:00007f57df218188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 00000000200000c0 RSI: 00000000800448f0 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc43be26cf R14: 00007f57df218300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1509: #0: 00000000f3ea9ccb (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4461 1 lock held by in:imklog/7890: 1 lock held by syz-executor.3/13975: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 1 lock held by syz-executor.4/14015: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 1 lock held by syz-executor.4/14016: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 1 lock held by syz-executor.2/14048: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 1 lock held by syz-executor.2/14049: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 1 lock held by syz-executor.1/14064: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 1 lock held by syz-executor648/14109: #0: 00000000edae5dc5 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x5b/0xb0 net/bluetooth/hci_request.c:273 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1509 Comm: khungtaskd Not tainted 4.18.0-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+0x15a/0x20d lib/dump_stack.c:113 nmi_cpu_backtrace.cold.0+0x13/0xb6 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0xf6/0x11a lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x512/0x940 kernel/hung_task.c:252 kthread+0x316/0x3d0 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10047 Comm: kworker/u4:6 Not tainted 4.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy36 ieee80211_iface_work RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:__call_rcu.constprop.47+0x28f/0x850 kernel/rcu/tree.c:2960 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d7 04 00 00 48 83 3d a5 e4 e4 07 00 0f 84 1d 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 80 3d RSP: 0018:ffff8800a163f3f8 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: ffff8800ab03ce88 RCX: 1ffff100143ef444 RDX: 1ffffffff12612c5 RSI: ffff8800a1f7a200 RDI: 0000000000000286 RBP: ffff8800a163f448 R08: ffff8800a1f7a220 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800ba748500 R13: ffff8800ba748590 R14: ffffffff893760c0 R15: ffff8800ba748580 FS: 0000000000000000(0000) GS:ffff8800ba700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9f7fc9c000 CR3: 00000000ac7bd000 CR4: 0000000000340ee0 Call Trace: kfree_call_rcu+0x15/0x20 kernel/rcu/tree.c:3027 cfg80211_bss_update+0x8f4/0x2a40 net/wireless/scan.c:969 cfg80211_inform_bss_frame_data+0x663/0xd20 net/wireless/scan.c:1245 ieee80211_bss_info_update+0x343/0x15a0 net/mac80211/scan.c:104 ieee80211_rx_bss_info net/mac80211/ibss.c:1125 [inline] ieee80211_rx_mgmt_probe_beacon+0x708/0x1460 net/mac80211/ibss.c:1607 ieee80211_ibss_rx_queued_mgmt+0x1d6/0x1860 net/mac80211/ibss.c:1634 ieee80211_iface_work+0x47e/0x690 net/mac80211/iface.c:1342 process_one_work+0x7b9/0x1580 kernel/workqueue.c:2153 worker_thread+0x85/0xb60 kernel/workqueue.c:2296 kthread+0x316/0x3d0 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:412