Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout INFO: task syz-executor.2:9676 blocked for more than 140 seconds. Not tainted 4.14.221-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28992 9676 8306 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x11a/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x16e/0x8b0 fs/fs-writeback.c:2464 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x107/0x1f0 fs/sync.c:48 nilfs_remount+0x50/0x450 fs/nilfs2/super.c:1129 do_remount_sb+0x154/0x630 fs/super.c:868 do_remount fs/namespace.c:2370 [inline] do_mount+0x1031/0x2af0 fs/namespace.c:2870 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f4608025188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 000000000056c008 R13: 00007fff4980c7cf R14: 00007f4608025300 R15: 0000000000022000 INFO: task syz-executor.0:9727 blocked for more than 140 seconds. Not tainted 4.14.221-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29176 9727 8309 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x11a/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x16e/0x8b0 fs/fs-writeback.c:2464 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x107/0x1f0 fs/sync.c:48 nilfs_remount+0x50/0x450 fs/nilfs2/super.c:1129 do_remount_sb+0x154/0x630 fs/super.c:868 do_remount fs/namespace.c:2370 [inline] do_mount+0x1031/0x2af0 fs/namespace.c:2870 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f0666a61188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 000000000056c008 R13: 00007fff52af4bdf R14: 00007f0666a61300 R15: 0000000000022000 INFO: task syz-executor.4:9738 blocked for more than 140 seconds. Not tainted 4.14.221-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D26056 9738 8307 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x11a/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x16e/0x8b0 fs/fs-writeback.c:2464 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x107/0x1f0 fs/sync.c:48 nilfs_remount+0x50/0x450 fs/nilfs2/super.c:1129 do_remount_sb+0x154/0x630 fs/super.c:868 do_remount fs/namespace.c:2370 [inline] do_mount+0x1031/0x2af0 fs/namespace.c:2870 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f3c59366188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe3f538c4f R14: 00007f3c59366300 R15: 0000000000022000 INFO: task syz-executor.5:9801 blocked for more than 140 seconds. Not tainted 4.14.221-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D29288 9801 8312 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x11a/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x16e/0x8b0 fs/fs-writeback.c:2464 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x107/0x1f0 fs/sync.c:48 nilfs_remount+0x50/0x450 fs/nilfs2/super.c:1129 do_remount_sb+0x154/0x630 fs/super.c:868 do_remount fs/namespace.c:2370 [inline] do_mount+0x1031/0x2af0 fs/namespace.c:2870 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007eff59950188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffe648479df R14: 00007eff59950300 R15: 0000000000022000 INFO: task syz-executor.1:9808 blocked for more than 140 seconds. Not tainted 4.14.221-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29176 9808 8314 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x11a/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x16e/0x8b0 fs/fs-writeback.c:2464 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x107/0x1f0 fs/sync.c:48 nilfs_remount+0x50/0x450 fs/nilfs2/super.c:1129 do_remount_sb+0x154/0x630 fs/super.c:868 do_remount fs/namespace.c:2370 [inline] do_mount+0x1031/0x2af0 fs/namespace.c:2870 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f27ed7a5188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffc8d44d84f R14: 00007f27ed7a5300 R15: 0000000000022000 INFO: task syz-executor.3:9826 blocked for more than 140 seconds. Not tainted 4.14.221-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29064 9826 8313 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x11a/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x16e/0x8b0 fs/fs-writeback.c:2464 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x107/0x1f0 fs/sync.c:48 nilfs_remount+0x50/0x450 fs/nilfs2/super.c:1129 do_remount_sb+0x154/0x630 fs/super.c:868 do_remount fs/namespace.c:2370 [inline] do_mount+0x1031/0x2af0 fs/namespace.c:2870 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f66678b1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffd87cc075f R14: 00007f66678b1300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:2/25: #0: ("writeback"){+.+.}, at: [] process_one_work+0x681/0x1620 kernel/workqueue.c:2087 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x6b4/0x1620 kernel/workqueue.c:2091 2 locks held by kworker/u4:3/223: #0: ("writeback"){+.+.}, at: [] process_one_work+0x681/0x1620 kernel/workqueue.c:2087 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x6b4/0x1620 kernel/workqueue.c:2091 2 locks held by kworker/u4:4/697: #0: ("writeback"){+.+.}, at: [] process_one_work+0x681/0x1620 kernel/workqueue.c:2087 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x6b4/0x1620 kernel/workqueue.c:2091 1 lock held by khungtaskd/1531: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4548 2 locks held by syz-executor.2/9676: #0: (&type->s_umount_key#49){+.+.}, at: [] do_remount fs/namespace.c:2364 [inline] #0: (&type->s_umount_key#49){+.+.}, at: [] do_mount+0x769/0x2af0 fs/namespace.c:2870 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x155/0x8b0 fs/fs-writeback.c:2462 2 locks held by syz-executor.0/9727: #0: (&type->s_umount_key#49){+.+.}, at: [] do_remount fs/namespace.c:2364 [inline] #0: (&type->s_umount_key#49){+.+.}, at: [] do_mount+0x769/0x2af0 fs/namespace.c:2870 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x155/0x8b0 fs/fs-writeback.c:2462 2 locks held by kworker/u4:6/9723: #0: ("writeback"){+.+.}, at: [] process_one_work+0x681/0x1620 kernel/workqueue.c:2087 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x6b4/0x1620 kernel/workqueue.c:2091 2 locks held by syz-executor.4/9738: #0: (&type->s_umount_key#49){+.+.}, at: [] do_remount fs/namespace.c:2364 [inline] #0: (&type->s_umount_key#49){+.+.}, at: [] do_mount+0x769/0x2af0 fs/namespace.c:2870 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x155/0x8b0 fs/fs-writeback.c:2462 2 locks held by syz-executor.5/9801: #0: (&type->s_umount_key#49){+.+.}, at: [] do_remount fs/namespace.c:2364 [inline] #0: (&type->s_umount_key#49){+.+.}, at: [] do_mount+0x769/0x2af0 fs/namespace.c:2870 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x155/0x8b0 fs/fs-writeback.c:2462 2 locks held by syz-executor.1/9808: #0: (&type->s_umount_key#49){+.+.}, at: [] do_remount fs/namespace.c:2364 [inline] #0: (&type->s_umount_key#49){+.+.}, at: [] do_mount+0x769/0x2af0 fs/namespace.c:2870 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x155/0x8b0 fs/fs-writeback.c:2462 2 locks held by syz-executor.3/9826: #0: (&type->s_umount_key#49){+.+.}, at: [] do_remount fs/namespace.c:2364 [inline] #0: (&type->s_umount_key#49){+.+.}, at: [] do_mount+0x769/0x2af0 fs/namespace.c:2870 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x155/0x8b0 fs/fs-writeback.c:2462 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1531 Comm: khungtaskd Not tainted 4.14.221-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x14b/0x1e7 lib/dump_stack.c:58 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf6/0x120 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:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x51b/0xa70 kernel/hung_task.c:274 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9823 Comm: segctord Not tainted 4.14.221-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880b39ec580 task.stack: ffff88809d228000 RIP: 0010:nilfs_segctor_scan_file+0x1a4/0x5c0 fs/nilfs2/segment.c:1063 RSP: 0018:ffff88809d22f9f8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888096672a24 RCX: 0000000000000007 RDX: 1ffff1101166cc6b RSI: dffffc0000000000 RDI: ffff88808b366538 RBP: ffff88809d22fae0 R08: 1ffff11010ec1838 R09: ffff88808b3713a8 R10: 0000000000000006 R11: ffff88809d22fa38 R12: ffff88808b366328 R13: ffff888096672940 R14: ffff88809d22fa78 R15: ffffffff87b97ba0 FS: 0000000000000000(0000) GS:ffff8880ba600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f38ca2db000 CR3: 00000000b0475000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1238 [inline] nilfs_segctor_collect fs/nilfs2/segment.c:1507 [inline] nilfs_segctor_do_construct+0x1764/0x84b0 fs/nilfs2/segment.c:2049 nilfs_segctor_construct+0x614/0x910 fs/nilfs2/segment.c:2385 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2493 [inline] nilfs_segctor_thread+0x386/0xc00 fs/nilfs2/segment.c:2577 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 48 2b 42 28 48 89 fa 48 c1 ea 03 48 8d 48 01 49 89 c2 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 df 03 00 00 49 8b 7c 24 30 <45> 31 c0 4c 89 da 49 b9 ff ff ff ff ff ff ff 7f 49 8d b4 24 c4