emi26 - firmware loader 2-1:1.0: emi26_probe start
Oops: genera[  190.968410][ T5580] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 5580 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:ihex_binrec_size include/linux/ihex.h:26 [inline]
RIP: 0010:__ihex_next_binrec include/linux/ihex.h:35 [inline]
RIP: 0010:ihex_validate_fw include/linux/ihex.h:54 [inline]
RIP: 0010:request_ihex_firmware include/linux/ihex.h:74 [inline]
RIP: 0010:emi26_load_firmware drivers/usb/misc/emi26.c:86 [inline]
RIP: 0010:emi26_probe+0x283/0x1690 drivers/usb/misc/emi26.c:232
Code: ff 89 de e8 6f 64 97 00 85 db 0f 84 d9 01 00 00 e8 62 60 97 00 48 bb 00 00 00 00 00 fc ff df 49 8d 7e 04 48 89 f8 48 c1 e8 03 <0f> b6 04 18 84 c0 75 47 49 8d 7e 05 48 89 f8 48 c1 e8 03 0f b6 04
RSP: 0018:ffffc90004c5ed20 EFLAGS: 00010247
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9001a81d000 RSI: 000000000000e12b RDI: 0000000000000004
RBP: ffffc90004c5ee50 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: fffffffffffffffa
R13: 1fffffffffffffff R14: 0000000000000000 R15: 1fffffffffffffff
FS:  0000000000000000(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c42ae87 CR3: 000000003af9e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_new_device+0x98d/0x1610 drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x28cf/0x4cf0 drivers/usb/core/hub.c:5953
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ihex_binrec_size include/linux/ihex.h:26 [inline]
RIP: 0010:__ihex_next_binrec include/linux/ihex.h:35 [inline]
RIP: 0010:ihex_validate_fw include/linux/ihex.h:54 [inline]
RIP: 0010:request_ihex_firmware include/linux/ihex.h:74 [inline]
RIP: 0010:emi26_load_firmware drivers/usb/misc/emi26.c:86 [inline]
RIP: 0010:emi26_probe+0x283/0x1690 drivers/usb/misc/emi26.c:232
Code: ff 89 de e8 6f 64 97 00 85 db 0f 84 d9 01 00 00 e8 62 60 97 00 48 bb 00 00 00 00 00 fc ff df 49 8d 7e 04 48 89 f8 48 c1 e8 03 <0f> b6 04 18 84 c0 75 47 49 8d 7e 05 48 89 f8 48 c1 e8 03 0f b6 04
RSP: 0018:ffffc90004c5ed20 EFLAGS: 00010247
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9001a81d000 RSI: 000000000000e12b RDI: 0000000000000004
RBP: ffffc90004c5ee50 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: fffffffffffffffa
R13: 1fffffffffffffff R14: 0000000000000000 R15: 1fffffffffffffff
FS:  0000000000000000(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c42ae87 CR3: 000000003af9e000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	89 de                	mov    %ebx,%esi
   2:	e8 6f 64 97 00       	call   0x976476
   7:	85 db                	test   %ebx,%ebx
   9:	0f 84 d9 01 00 00    	je     0x1e8
   f:	e8 62 60 97 00       	call   0x976076
  14:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  1b:	fc ff df
  1e:	49 8d 7e 04          	lea    0x4(%r14),%rdi
  22:	48 89 f8             	mov    %rdi,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	75 47                	jne    0x78
  31:	49 8d 7e 05          	lea    0x5(%r14),%rdi
  35:	48 89 f8             	mov    %rdi,%rax
  38:	48 c1 e8 03          	shr    $0x3,%rax
  3c:	0f                   	.byte 0xf
  3d:	b6 04                	mov    $0x4,%dh