usb usb2: usbfs: process 14537 (syz-executor.3) did not claim interface 0 before use usb usb2: usbfs: process 14545 (syz-executor.1) did not claim interface 0 before use usb usb2: usbfs: process 14551 (syz-executor.4) did not claim interface 0 before use INFO: task syz-executor.2:14522 blocked for more than 140 seconds. Not tainted 4.14.275-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28664 14522 8009 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_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: 0033:0x7f464a6fd049 RSP: 002b:00007f4649072168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f464a80ff60 RCX: 00007f464a6fd049 RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007f464a75708d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1a820fff R14: 00007f4649072300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1534: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7681: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 fs/file.c:819 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1534 Comm: khungtaskd Not tainted 4.14.275-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: 4619 Comm: systemd-journal Not tainted 4.14.275-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a153a000 task.stack: ffff8880a1540000 RIP: 0010:___bpf_prog_run+0xb0/0x5a70 kernel/bpf/core.c:1004 RSP: 0018:ffff8880a1547a48 EFLAGS: 00000246 RAX: 1ffffffff0f1e1a5 RBX: dffffc0000000000 RCX: 1ffff110142a8f72 RDX: 0000000000000000 RSI: ffffc90001a5d030 RDI: ffffffff878f0d28 RBP: ffff8880a1547b58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff878f0a20 R13: 1ffff110142a8f50 R14: ffffc90001a5d048 R15: 0000000000000061 FS: 00007f11d09f08c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11cd7a3000 CR3: 00000000a2376000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Code: 03 83 e2 07 0f b6 04 18 38 d0 7f 08 84 c0 0f 85 10 42 00 00 45 0f b6 3e 4a 8d 3c fd 20 0a 8f 87 48 89 f8 48 c1 e8 03 80 3c 18 00 <0f> 85 ea 41 00 00 43 ff 24 fc e8 21 f6 f6 ff 48 c7 c6 a0 09 8f ---------------- Code disassembly (best guess): 0: 03 83 e2 07 0f b6 add -0x49f0f81e(%rbx),%eax 6: 04 18 add $0x18,%al 8: 38 d0 cmp %dl,%al a: 7f 08 jg 0x14 c: 84 c0 test %al,%al e: 0f 85 10 42 00 00 jne 0x4224 14: 45 0f b6 3e movzbl (%r14),%r15d 18: 4a 8d 3c fd 20 0a 8f lea -0x7870f5e0(,%r15,8),%rdi 1f: 87 20: 48 89 f8 mov %rdi,%rax 23: 48 c1 e8 03 shr $0x3,%rax 27: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) * 2b: 0f 85 ea 41 00 00 jne 0x421b <-- trapping instruction 31: 43 ff 24 fc jmpq *(%r12,%r15,8) 35: e8 21 f6 f6 ff callq 0xfff6f65b 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: c6 (bad) 3d: a0 .byte 0xa0 3e: 09 .byte 0x9 3f: 8f .byte 0x8f