general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 297 Comm: kworker/1:2 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:strlen+0x29/0x70 lib/string.c:581 Code: 00 55 48 89 e5 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 RSP: 0018:ffffc90000af6eb8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881274f93c0 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000af6ed8 R08: ffff8881098911df R09: 1ffff1102131223b R10: dffffc0000000000 R11: ffffed102131223c R12: 0000000000000000 R13: 1ffff11021308ed2 R14: dffffc0000000000 R15: ffffffffffffffff FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f727109b060 CR3: 000000010e0e9000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: start_creating+0x161/0x300 fs/debugfs/inode.c:354 debugfs_create_dir+0x27/0x4c0 fs/debugfs/inode.c:559 hid_debug_register+0x31/0x130 drivers/hid/hid-debug.c:1210 hid_add_device+0x341/0x4b0 drivers/hid/hid-core.c:2498 usbhid_probe+0xb93/0xf30 drivers/hid/usbhid/hid-core.c:1442 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x27d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429 __device_attach+0x2b0/0x420 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xaef/0xe90 drivers/base/core.c:3422 usb_set_configuration+0x1a01/0x1f70 drivers/usb/core/message.c:2223 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x27d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429 __device_attach+0x2b0/0x420 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xaef/0xe90 drivers/base/core.c:3422 usb_new_device+0xa1f/0x1720 drivers/usb/core/hub.c:2638 hub_port_connect drivers/usb/core/hub.c:5555 [inline] hub_port_connect_change drivers/usb/core/hub.c:5695 [inline] port_event drivers/usb/core/hub.c:5861 [inline] hub_event+0x291b/0x43f0 drivers/usb/core/hub.c:5943 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Modules linked in: ---[ end trace 3127f4ed52bda28c ]--- RIP: 0010:strlen+0x29/0x70 lib/string.c:581 Code: 00 55 48 89 e5 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 RSP: 0018:ffffc90000af6eb8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881274f93c0 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000af6ed8 R08: ffff8881098911df R09: 1ffff1102131223b R10: dffffc0000000000 R11: ffffed102131223c R12: 0000000000000000 R13: 1ffff11021308ed2 R14: dffffc0000000000 R15: ffffffffffffffff FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc1163b2f8 CR3: 0000000130cf8000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 55 48 add %dl,0x48(%rbp) 3: 89 e5 mov %esp,%ebp 5: 41 57 push %r15 7: 41 56 push %r14 9: 41 54 push %r12 b: 53 push %rbx c: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax 13: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 1a: fc ff df 1d: 48 89 fb mov %rdi,%rbx 20: 49 89 c7 mov %rax,%r15 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 75 11 jne 0x44 33: 48 ff c3 inc %rbx 36: 49 8d 47 01 lea 0x1(%r15),%rax 3a: 42 80 7c 3f 01 00 cmpb $0x0,0x1(%rdi,%r15,1)