general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 4321 Comm: kworker/0:5 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: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+0x282/0x1610 drivers/usb/misc/emi26.c:232
Code: ff 89 de e8 30 fd 56 f7 85 db 0f 84 cc 01 00 00 e8 43 fa 56 f7 48 bb 00 00 00 00 00 fc ff df 49 8d 7d 04 48 89 f8 48 c1 e8 03 <0f> b6 04 18 84 c0 75 47 49 8d 7d 05 48 89 f8 48 c1 e8 03 0f b6 04
RSP: 0018:ffffc900041b6ee0 EFLAGS: 00010247
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9001a391000 RSI: 000000000001440c RDI: 0000000000000004
RBP: ffffc900041b7020 R08: ffffffff90b0f2af R09: 1ffffffff2161e55
R10: dffffc0000000000 R11: fffffbfff2161e56 R12: fffffffffffffffa
R13: 0000000000000000 R14: 1fffffffffffffff R15: 1fffffffffffffff
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3fa75556c8 CR3: 000000005c031000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 usb_probe_interface+0x5be/0xae0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x24a/0xb40 drivers/base/dd.c:638
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:804
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:834
 __device_attach_driver+0x2c6/0x510 drivers/base/dd.c:962
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2a7/0x480 drivers/base/dd.c:1034
 bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
 device_add+0xbcf/0x1050 drivers/base/core.c:3712
 usb_set_configuration+0x19d5/0x2030 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x126/0x250 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x24a/0xb40 drivers/base/dd.c:638
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:804
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:834
 __device_attach_driver+0x2c6/0x510 drivers/base/dd.c:962
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2a7/0x480 drivers/base/dd.c:1034
 bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
 device_add+0xbcf/0x1050 drivers/base/core.c:3712
 usb_new_device+0xa01/0x15e0 drivers/usb/core/hub.c:2659
 hub_port_connect drivers/usb/core/hub.c:5517 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5657 [inline]
 port_event drivers/usb/core/hub.c:5817 [inline]
 hub_event+0x2b2f/0x5200 drivers/usb/core/hub.c:5899
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </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+0x282/0x1610 drivers/usb/misc/emi26.c:232
Code: ff 89 de e8 30 fd 56 f7 85 db 0f 84 cc 01 00 00 e8 43 fa 56 f7 48 bb 00 00 00 00 00 fc ff df 49 8d 7d 04 48 89 f8 48 c1 e8 03 <0f> b6 04 18 84 c0 75 47 49 8d 7d 05 48 89 f8 48 c1 e8 03 0f b6 04
RSP: 0018:ffffc900041b6ee0 EFLAGS: 00010247

RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9001a391000 RSI: 000000000001440c RDI: 0000000000000004
RBP: ffffc900041b7020 R08: ffffffff90b0f2af R09: 1ffffffff2161e55
R10: dffffc0000000000 R11: fffffbfff2161e56 R12: fffffffffffffffa
R13: 0000000000000000 R14: 1fffffffffffffff R15: 1fffffffffffffff
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3fa755da08 CR3: 000000007e122000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	ff 89 de e8 30 fd    	decl   -0x2cf1722(%rcx)
   6:	56                   	push   %rsi
   7:	f7 85 db 0f 84 cc 01 	testl  $0xe8000001,-0x337bf025(%rbp)
   e:	00 00 e8
  11:	43 fa                	rex.XB cli
  13:	56                   	push   %rsi
  14:	f7 48 bb 00 00 00 00 	testl  $0x0,-0x45(%rax)
  1b:	00 fc                	add    %bh,%ah
  1d:	ff                   	lcall  (bad)
  1e:	df 49 8d             	fisttps -0x73(%rcx)
  21:	7d 04                	jge    0x27
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	75 47                	jne    0x79
  32:	49 8d 7d 05          	lea    0x5(%r13),%rdi
  36:	48 89 f8             	mov    %rdi,%rax
  39:	48 c1 e8 03          	shr    $0x3,%rax
  3d:	0f                   	.byte 0xf
  3e:	b6 04                	mov    $0x4,%dh