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: 25014 Comm: syz.8.5869 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: 0000:ffffc90000a087f8 EFLAGS: 00010002
RAX: 0000000000000038 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc900023e2000 RSI: 0000000000000207 RDI: 0000000000000208
RBP: 0000000000000000 R08: ffff8880253aa01f R09: 1ffff11004a75403
R10: dffffc0000000000 R11: ffffed1004a75404 R12: dffffc0000000000
R13: ffff8880253aa018 R14: 00000000000001c0 R15: 0000000000000000
FS:  00007f0c873826c0(0000) GS:ffff8881253b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000d000 CR3: 000000005b56c000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 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
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:727
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1a 76 ff f5 48 89 df e8 82 ea ff f5 e8 3d fb 2a f6 fb bf 01 00 00 00 <e8> 02 be f1 f5 65 8b 05 5b 05 75 07 85 c0 74 07 5b e9 c1 47 00 00
RSP: 0000:ffffc9000ce778f0 EFLAGS: 00000206
RAX: 000000000000b055 RBX: ffffc9000ce77ae8 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dedf6c1 RDI: 0000000000000001
RBP: ffffc9000ce77a30 R08: ffffffff901020b7 R09: 1ffffffff2020416
R10: dffffc0000000000 R11: fffffbfff2020417 R12: ffff88802865d420
R13: ffffc9000ce77ae0 R14: ffffc9000ce779a8 R15: 1ffff920019cef30
 __wait_for_common kernel/sched/completion.c:122 [inline]
 wait_for_common kernel/sched/completion.c:132 [inline]
 wait_for_completion+0x4d2/0x5e0 kernel/sched/completion.c:153
 rdmsr_safe_on_cpu+0x18e/0x2b0 arch/x86/lib/msr-smp.c:181
 msr_read+0x150/0x250 arch/x86/kernel/msr.c:66
 vfs_read+0x20c/0xa70 fs/read_write.c:572
 ksys_read+0x150/0x270 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c8659aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0c87382028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f0c86815fa0 RCX: 00007f0c8659aeb9
RDX: 0000000000019000 RSI: 0000200000002240 RDI: 0000000000000003
RBP: 00007f0c86608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0c86816038 R14: 00007f0c86815fa0 R15: 00007ffc4cab7638
 </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: 0000:ffffc90000a087f8 EFLAGS: 00010002
RAX: 0000000000000038 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc900023e2000 RSI: 0000000000000207 RDI: 0000000000000208
RBP: 0000000000000000 R08: ffff8880253aa01f R09: 1ffff11004a75403
R10: dffffc0000000000 R11: ffffed1004a75404 R12: dffffc0000000000
R13: ffff8880253aa018 R14: 00000000000001c0 R15: 0000000000000000
FS:  00007f0c873826c0(0000) GS:ffff8881253b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000d000 CR3: 000000005b56c000 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