usb usb2: usbfs: process 942 (syz-executor.5) did not claim interface 0 before use usb usb6: usbfs: process 944 (syz-executor.2) did not claim interface 0 before use usb usb6: usbfs: process 944 (syz-executor.2) did not claim interface 0 before use INFO: task syz-executor.1:923 blocked for more than 140 seconds. Not tainted 4.14.214-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28880 923 8003 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 usb_start_wait_urb+0x125/0x440 drivers/usb/core/message.c:61 usb_bulk_msg+0x1f6/0x500 drivers/usb/core/message.c:252 proc_bulk+0x331/0x6d0 drivers/usb/core/devio.c:1223 usbdev_do_ioctl+0x5b0/0x2b70 drivers/usb/core/devio.c:2449 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2599 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: 0033:0x45e219 RSP: 002b:00007fedfce77c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000020000080 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffe9e1714bf R14: 00007fedfce789c0 R15: 000000000119bf8c 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 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.214-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+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f 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: 4623 Comm: systemd-journal Not tainted 4.14.214-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a170a100 task.stack: ffff8880a1710000 RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x50 kernel/kcov.c:68 RSP: 0018:ffff8880a1717dd0 EFLAGS: 00000246 RAX: ffff8880a170a100 RBX: ffff8880a170a100 RCX: 0000000000000a00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffffffff87ccc060 R08: ffffffff8b98eac0 R09: 000000000005040b R10: ffff8880a170a988 R11: ffff8880a170a100 R12: 0000000000000019 R13: dffffc0000000000 R14: ffff8880a1717eb0 R15: 0000000000000000 FS: 00007f4ae30818c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4addecc000 CR3: 00000000a1f8c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __might_fault mm/memory.c:4677 [inline] __might_fault+0x13d/0x1b0 mm/memory.c:4662 _copy_to_user+0x27/0xd0 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] put_timespec64+0x9e/0xf0 kernel/time/time.c:920 SYSC_clock_gettime kernel/time/posix-timers.c:1075 [inline] SyS_clock_gettime+0x128/0x180 kernel/time/posix-timers.c:1063 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7ffd12515b8e RSP: 002b:00007ffd1250efd0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e4 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007ffd12515b8e RDX: ffffffffffffffff RSI: 00007ffd1250f020 RDI: 0000000000000007 RBP: 00007ffd1250eff0 R08: 00007ffd12513000 R09: 000002673130ce69 R10: 00014a6148788a9c R11: 0000000000000202 R12: 00007ffd12512080 R13: 0000000000000001 R14: 0000000000000001 R15: 0005b8b0cab8e94b Code: 00 00 e9 c6 ed ff ff 90 65 48 8b 04 25 80 df 01 00 48 85 c0 74 1a 65 8b 15 6b 9e aa 7e 81 e2 00 01 1f 00 75 0b 8b 90 58 13 00 00 <83> fa 01 74 01 c3 48 8b 34 24 48 8b 88 60 13 00 00 8b 80 5c 13