Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout INFO: task syz-executor.3:7984 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D25840 7984 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1634 __blkdev_get+0x306/0x1090 fs/block_dev.c:1470 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7feb3300bf64 RSP: 002b:00007ffd5c5782b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffd5c5783b0 RCX: 00007feb3300bf64 RDX: 0000000000000002 RSI: 00007ffd5c5783f0 RDI: 00000000ffffff9c RBP: 00007ffd5c5783f0 R08: 0000000000000000 R09: 00007ffd5c5781c0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007feb33139140 R14: 00007feb33139e48 R15: 00007ffd5c5783f0 INFO: task syz-executor.1:7985 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25840 7985 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1634 __blkdev_get+0x306/0x1090 fs/block_dev.c:1470 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fbd40ea3f64 RSP: 002b:00007ffd02cc1540 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffd02cc1640 RCX: 00007fbd40ea3f64 RDX: 0000000000000002 RSI: 00007ffd02cc1680 RDI: 00000000ffffff9c RBP: 00007ffd02cc1680 R08: 0000000000000000 R09: 00007ffd02cc1450 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007fbd40fd1140 R14: 00007fbd40fd1e48 R15: 00007ffd02cc1680 INFO: task syz-executor.2:7986 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D25640 7986 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1634 __blkdev_get+0x306/0x1090 fs/block_dev.c:1470 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f727d7cbf64 RSP: 002b:00007ffd79f283e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffd79f284e0 RCX: 00007f727d7cbf64 RDX: 0000000000000002 RSI: 00007ffd79f28520 RDI: 00000000ffffff9c RBP: 00007ffd79f28520 R08: 0000000000000000 R09: 00007ffd79f282f0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007f727d8f9140 R14: 00007f727d8f9e48 R15: 00007ffd79f28520 INFO: task syz-executor.4:7987 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D25240 7987 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1634 __blkdev_get+0x306/0x1090 fs/block_dev.c:1470 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f43ec8e9f64 RSP: 002b:00007ffcc3b0add0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffcc3b0aed0 RCX: 00007f43ec8e9f64 RDX: 0000000000000002 RSI: 00007ffcc3b0af10 RDI: 00000000ffffff9c RBP: 00007ffcc3b0af10 R08: 0000000000000000 R09: 00007ffcc3b0ace0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007f43eca17140 R14: 00007f43eca17e48 R15: 00007ffcc3b0af10 INFO: task systemd-udevd:9359 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28712 9359 4626 0x00000300 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1634 __blkdev_get+0xa8c/0x1090 fs/block_dev.c:1537 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f296b844840 RSP: 002b:00007ffc4bb05558 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005654e44597c0 RCX: 00007f296b844840 RDX: 00005654e3cb9fe3 RSI: 00000000000a0800 RDI: 00005654e4459360 RBP: 00007ffc4bb056d0 R08: 00005654e3cb9670 R09: 0000000000000010 R10: 00005654e3cb9d0c R11: 0000000000000246 R12: 00007ffc4bb05620 R13: 00005654e44593b0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.5:9365 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D30016 9365 7979 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 loop_control_ioctl+0x181/0x3f0 drivers/block/loop.c:2007 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f42a561f049 RSP: 002b:00007f42a3f94168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f42a5731f60 RCX: 00007f42a561f049 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003 RBP: 00007f42a567908d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffceff2108f R14: 00007f42a3f94300 R15: 0000000000022000 INFO: task syz-executor.0:9364 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29248 9364 7982 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 loop_reread_partitions drivers/block/loop.c:624 [inline] loop_set_status+0xeeb/0x12b0 drivers/block/loop.c:1193 loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311 lo_ioctl+0x587/0x1cd0 drivers/block/loop.c:1441 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x540/0x1830 block/ioctl.c:594 block_ioctl+0xd9/0x120 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fa56603ce07 RSP: 002b:00007fa5649b1ed8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fa5649b1f20 RCX: 00007fa56603ce07 RDX: 00007fa5649b2030 RSI: 0000000000004c04 RDI: 0000000000000004 RBP: 00007fa56609708d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00007fa5649b2030 R13: 00007ffed3c7215f R14: 00007fa5649b2300 R15: 0000000000022000 INFO: task systemd-udevd:9373 blocked for more than 140 seconds. Not tainted 4.14.274-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28544 9373 4626 0x00000300 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1634 __blkdev_get+0x306/0x1090 fs/block_dev.c:1470 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f296b844840 RSP: 002b:00007ffc4bb05558 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005654e44597c0 RCX: 00007f296b844840 RDX: 00005654e3cb9fe3 RSI: 00000000000a0800 RDI: 00005654e4447510 RBP: 00007ffc4bb056d0 R08: 00005654e3cb9670 R09: 0000000000000010 R10: 00005654e3cb9d0c R11: 0000000000000246 R12: 00007ffc4bb05620 R13: 00005654e4447320 R14: 0000000000000003 R15: 000000000000000e Showing all locks held in the system: 1 lock held by khungtaskd/1532: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7616: #0: (&f->f_pos_lock){+.+.}, at: [] try_to_wake_up+0x6a/0x1100 kernel/sched/core.c:2000 2 locks held by syz-executor.3/7984: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 2 locks held by syz-executor.1/7985: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 2 locks held by syz-executor.2/7986: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 2 locks held by syz-executor.4/7987: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 2 locks held by systemd-udevd/9359: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 2 locks held by syz-executor.5/9365: #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 drivers/block/loop.c:1993 #1: (&lo->lo_ctl_mutex){+.+.}, at: [] loop_control_ioctl+0x181/0x3f0 drivers/block/loop.c:2007 2 locks held by syz-executor.0/9364: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 2 locks held by systemd-udevd/9373: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.274-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+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7965 Comm: syz-fuzzer Not tainted 4.14.274-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880979a4280 task.stack: ffff8880a1bf0000 RIP: 0010:__lock_is_held+0x2e/0x160 kernel/locking/lockdep.c:3811 RSP: 0018:ffff8880ba507d80 EFLAGS: 00000806 RAX: dffffc0000000000 RBX: 0000000000000086 RCX: 1ffffffff127a4bc RDX: 1ffff11012f34960 RSI: 00000000ffffffff RDI: ffff8880979a4b00 RBP: ffffffff88f7a118 R08: 0000000000000286 R09: ffffffff88f7a138 R10: ffff8880979a4b08 R11: ffff8880979a4280 R12: ffff8880979a4280 R13: ffff8880ba5350e8 R14: ffffffff88f7a118 R15: ffff8880979a4280 FS: 000000c000030c90(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f927249a000 CR3: 00000000ab4b8000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held_type+0x10d/0x210 kernel/locking/lockdep.c:4036 lock_is_held include/linux/lockdep.h:437 [inline] rcu_cbs_completed+0x7d/0xe0 kernel/rcu/tree.c:1649 rcu_start_future_gp kernel/rcu/tree.c:1702 [inline] rcu_accelerate_cbs+0xfe/0x620 kernel/rcu/tree.c:1849 rcu_report_qs_rdp kernel/rcu/tree.c:2538 [inline] rcu_check_quiescent_state kernel/rcu/tree.c:2577 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2913 [inline] rcu_process_callbacks+0xcb1/0x1180 kernel/rcu/tree.c:2946 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:schedule_debug kernel/sched/core.c:3201 [inline] RIP: 0010:__schedule+0xf6/0x1de0 kernel/sched/core.c:3311 RSP: 0018:ffff8880a1bf7b00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1101437e000 RSI: ffffffff87ccfc80 RDI: ffff8880979a4298 RBP: ffff8880a1bf7bb0 R08: ffffffff8c021b48 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000034380 R13: ffff8880ba534380 R14: ffff8880a1bf0000 R15: ffff8880979a4280 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_hrtimeout_range_clock+0x156/0x320 kernel/time/hrtimer.c:1719 ep_poll+0x85e/0xa50 fs/eventpoll.c:1827 SYSC_epoll_wait fs/eventpoll.c:2195 [inline] SyS_epoll_wait+0x150/0x1a0 fs/eventpoll.c:2160 SYSC_epoll_pwait fs/eventpoll.c:2226 [inline] SyS_epoll_pwait+0x1e9/0x230 fs/eventpoll.c:2206 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x466ae0 RSP: 002b:000000c00003d7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000466ae0 RDX: 0000000000000080 RSI: 000000c00003d840 RDI: 0000000000000003 RBP: 000000c00003de40 R08: 0000000000000000 R09: 00000042cca677a4 R10: 0000000000000001 R11: 0000000000000246 R12: 000000c00003d870 R13: 0000000000003680 R14: 000000c000001040 R15: 0000000000001018 Code: 00 00 00 00 fc ff df 41 57 65 4c 8b 3c 25 c0 7f 02 00 41 56 49 89 fe 49 8d bf 80 08 00 00 41 55 48 89 fa 41 54 48 c1 ea 03 55 53 <48> 83 ec 08 0f b6 04 02 89 74 24 04 84 c0 74 08 3c 03 0f 8e ec ---------------- Code disassembly (best guess), 6 bytes skipped: 0: df 41 57 filds 0x57(%rcx) 3: 65 4c 8b 3c 25 c0 7f mov %gs:0x27fc0,%r15 a: 02 00 c: 41 56 push %r14 e: 49 89 fe mov %rdi,%r14 11: 49 8d bf 80 08 00 00 lea 0x880(%r15),%rdi 18: 41 55 push %r13 1a: 48 89 fa mov %rdi,%rdx 1d: 41 54 push %r12 1f: 48 c1 ea 03 shr $0x3,%rdx 23: 55 push %rbp 24: 53 push %rbx * 25: 48 83 ec 08 sub $0x8,%rsp <-- trapping instruction 29: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 2d: 89 74 24 04 mov %esi,0x4(%rsp) 31: 84 c0 test %al,%al 33: 74 08 je 0x3d 35: 3c 03 cmp $0x3,%al 37: 0f .byte 0xf 38: 8e ec mov %esp,%gs