Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 INFO: task syz-executor.5:10063 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.5 D27480 10063 8570 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_timeout+0x70e/0xd20 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x3fb/0x5d0 kernel/sched/completion.c:115 wait_for_completion+0x18/0x20 kernel/sched/completion.c:136 kthread_stop+0xc9/0x550 kernel/kthread.c:548 ext4_fill_super+0x71af/0xaf00 fs/ext4/super.c:4497 mount_bdev+0x26f/0x330 fs/super.c:1174 ext4_mount+0x10/0x20 fs/ext4/super.c:5839 mount_fs+0x7f/0x2a9 fs/super.c:1277 vfs_kern_mount.part.9+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2542 [inline] do_mount+0x376/0x2710 fs/namespace.c:2872 ksys_mount+0xb1/0xd0 fs/namespace.c:3088 __do_sys_mount fs/namespace.c:3102 [inline] __se_sys_mount fs/namespace.c:3099 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3099 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467afa Code: 4c 8b 84 24 90 01 00 00 4c 8b 4c 24 50 4d 89 0c d8 e9 00 ff ff ff 48 89 44 24 58 48 89 94 24 60 01 00 00 48 8d 05 86 ee 1d 00 <48> 89 04 24 48 8b 8c 24 90 01 00 00 48 89 4c 24 08 48 89 5c 24 10 RSP: 002b:00007fd9c5e1cfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fd9c5e1d000 RBP: 00007fd9c5e1d040 R08: 00007fd9c5e1d040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007fd9c5e1d000 R15: 0000000020000200 INFO: task syz-executor.1:10085 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 D27480 10085 8566 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_timeout+0x70e/0xd20 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x3fb/0x5d0 kernel/sched/completion.c:115 wait_for_completion+0x18/0x20 kernel/sched/completion.c:136 kthread_stop+0xc9/0x550 kernel/kthread.c:548 ext4_fill_super+0x71af/0xaf00 fs/ext4/super.c:4497 mount_bdev+0x26f/0x330 fs/super.c:1174 ext4_mount+0x10/0x20 fs/ext4/super.c:5839 mount_fs+0x7f/0x2a9 fs/super.c:1277 vfs_kern_mount.part.9+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2542 [inline] do_mount+0x376/0x2710 fs/namespace.c:2872 ksys_mount+0xb1/0xd0 fs/namespace.c:3088 __do_sys_mount fs/namespace.c:3102 [inline] __se_sys_mount fs/namespace.c:3099 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3099 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467afa Code: 4c 8b 84 24 90 01 00 00 4c 8b 4c 24 50 4d 89 0c d8 e9 00 ff ff ff 48 89 44 24 58 48 89 94 24 60 01 00 00 48 8d 05 86 ee 1d 00 <48> 89 04 24 48 8b 8c 24 90 01 00 00 48 89 4c 24 08 48 89 5c 24 10 RSP: 002b:00007f7e872f7fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f7e872f8000 RBP: 00007f7e872f8040 R08: 00007f7e872f8040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007f7e872f8000 R15: 0000000020000200 INFO: task syz-executor.2:10120 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 D27480 10120 8562 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_timeout+0x70e/0xd20 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x3fb/0x5d0 kernel/sched/completion.c:115 wait_for_completion+0x18/0x20 kernel/sched/completion.c:136 kthread_stop+0xc9/0x550 kernel/kthread.c:548 ext4_fill_super+0x71af/0xaf00 fs/ext4/super.c:4497 mount_bdev+0x26f/0x330 fs/super.c:1174 ext4_mount+0x10/0x20 fs/ext4/super.c:5839 mount_fs+0x7f/0x2a9 fs/super.c:1277 vfs_kern_mount.part.9+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2542 [inline] do_mount+0x376/0x2710 fs/namespace.c:2872 ksys_mount+0xb1/0xd0 fs/namespace.c:3088 __do_sys_mount fs/namespace.c:3102 [inline] __se_sys_mount fs/namespace.c:3099 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3099 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467afa Code: 4c 8b 84 24 90 01 00 00 4c 8b 4c 24 50 4d 89 0c d8 e9 00 ff ff ff 48 89 44 24 58 48 89 94 24 60 01 00 00 48 8d 05 86 ee 1d 00 <48> 89 04 24 48 8b 8c 24 90 01 00 00 48 89 4c 24 08 48 89 5c 24 10 RSP: 002b:00007f2fa8446fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f2fa8447000 RBP: 00007f2fa8447040 R08: 00007f2fa8447040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007f2fa8447000 R15: 0000000020000200 INFO: task syz-executor.0:10151 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.0 D27480 10151 8571 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_timeout+0x70e/0xd20 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x3fb/0x5d0 kernel/sched/completion.c:115 wait_for_completion+0x18/0x20 kernel/sched/completion.c:136 kthread_stop+0xc9/0x550 kernel/kthread.c:548 ext4_fill_super+0x71af/0xaf00 fs/ext4/super.c:4497 mount_bdev+0x26f/0x330 fs/super.c:1174 ext4_mount+0x10/0x20 fs/ext4/super.c:5839 mount_fs+0x7f/0x2a9 fs/super.c:1277 vfs_kern_mount.part.9+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2542 [inline] do_mount+0x376/0x2710 fs/namespace.c:2872 ksys_mount+0xb1/0xd0 fs/namespace.c:3088 __do_sys_mount fs/namespace.c:3102 [inline] __se_sys_mount fs/namespace.c:3099 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3099 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467afa Code: 4c 8b 84 24 90 01 00 00 4c 8b 4c 24 50 4d 89 0c d8 e9 00 ff ff ff 48 89 44 24 58 48 89 94 24 60 01 00 00 48 8d 05 86 ee 1d 00 <48> 89 04 24 48 8b 8c 24 90 01 00 00 48 89 4c 24 08 48 89 5c 24 10 RSP: 002b:00007fc0229b0fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fc0229b1000 RBP: 00007fc0229b1040 R08: 00007fc0229b1040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007fc0229b1000 R15: 0000000020000200 Showing all locks held in the system: 1 lock held by khungtaskd/1509: #0: 0000000014eb75fa (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4461 1 lock held by in:imklog/7863: #0: 00000000e997430e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xa7/0xd0 fs/file.c:766 1 lock held by syz-executor.5/10063: #0: 00000000a9a8c9f9 (&type->s_umount_key#25/1){+.+.}, at: alloc_super fs/super.c:223 [inline] #0: 00000000a9a8c9f9 (&type->s_umount_key#25/1){+.+.}, at: sget_userns+0x1a1/0xb60 fs/super.c:516 1 lock held by syz-executor.1/10085: #0: 00000000031db7ef (&type->s_umount_key#25/1){+.+.}, at: alloc_super fs/super.c:223 [inline] #0: 00000000031db7ef (&type->s_umount_key#25/1){+.+.}, at: sget_userns+0x1a1/0xb60 fs/super.c:516 1 lock held by syz-executor.2/10120: #0: 00000000dd4cb7df (&type->s_umount_key#25/1){+.+.}, at: alloc_super fs/super.c:223 [inline] #0: 00000000dd4cb7df (&type->s_umount_key#25/1){+.+.}, at: sget_userns+0x1a1/0xb60 fs/super.c:516 1 lock held by syz-executor.0/10151: #0: 0000000077a2d79d (&type->s_umount_key#25/1){+.+.}, at: alloc_super fs/super.c:223 [inline] #0: 0000000077a2d79d (&type->s_umount_key#25/1){+.+.}, at: sget_userns+0x1a1/0xb60 fs/super.c:516 ============================================= NMI backtrace for cpu 1 CPU: 1 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 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54