Oops: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:__queue_work+0xa2/0xf90 kernel/workqueue.c:2269
Code: 11 31 ff 89 ee e8 4e f4 37 00 85 ed 0f 85 ef 0c 00 00 e8 01 f0 37 00 4d 8d b7 c0 01 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 28 <42> 0f b6 04 20 84 c0 0f 85 22 0d 00 00 4c 89 34 24 41 8b 2e 89 ee
RSP: 0018:ffffc900001d7598 EFLAGS: 00010002
RAX: 0000000000000038 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc90002352000 RSI: 000000000000020a RDI: 000000000000020b
RBP: 0000000000000000 R08: ffff88804e90201f R09: 1ffff11009d20403
R10: dffffc0000000000 R11: ffffed1009d20404 R12: dffffc0000000000
R13: ffff88804e902018 R14: 00000000000001c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881253b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f24220 CR3: 0000000033ff2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2405
 qt2_process_read_urb drivers/usb/serial/quatech2.c:541 [inline]
 qt2_read_bulk_callback+0xe96/0x1030 drivers/usb/serial/quatech2.c:574
 __usb_hcd_giveback_urb+0x376/0x540 drivers/usb/core/hcd.c:1657
 dummy_timer+0xbbd/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1995
 __run_hrtimer kernel/time/hrtimer.c:1785 [inline]
 __hrtimer_run_queues+0x529/0xc30 kernel/time/hrtimer.c:1849
 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866
 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:626
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1067
 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51b/0xa40 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:__queue_work+0xa2/0xf90 kernel/workqueue.c:2269
Code: 11 31 ff 89 ee e8 4e f4 37 00 85 ed 0f 85 ef 0c 00 00 e8 01 f0 37 00 4d 8d b7 c0 01 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 28 <42> 0f b6 04 20 84 c0 0f 85 22 0d 00 00 4c 89 34 24 41 8b 2e 89 ee
RSP: 0018:ffffc900001d7598 EFLAGS: 00010002
RAX: 0000000000000038 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc90002352000 RSI: 000000000000020a RDI: 000000000000020b
RBP: 0000000000000000 R08: ffff88804e90201f R09: 1ffff11009d20403
R10: dffffc0000000000 R11: ffffed1009d20404 R12: dffffc0000000000
R13: ffff88804e902018 R14: 00000000000001c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881253b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f24220 CR3: 0000000033ff2000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	31 ff                	xor    %edi,%edi
   2:	89 ee                	mov    %ebp,%esi
   4:	e8 4e f4 37 00       	call   0x37f457
   9:	85 ed                	test   %ebp,%ebp
   b:	0f 85 ef 0c 00 00    	jne    0xd00
  11:	e8 01 f0 37 00       	call   0x37f017
  16:	4d 8d b7 c0 01 00 00 	lea    0x1c0(%r15),%r14
  1d:	4c 89 f0             	mov    %r14,%rax
  20:	48 c1 e8 03          	shr    $0x3,%rax
  24:	48 89 44 24 28       	mov    %rax,0x28(%rsp)
* 29:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 22 0d 00 00    	jne    0xd58
  36:	4c 89 34 24          	mov    %r14,(%rsp)
  3a:	41 8b 2e             	mov    (%r14),%ebp
  3d:	89 ee                	mov    %ebp,%esi