Oops: divide error: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 3525 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue:  0x0 (events_unbound)
RIP: 0010:comedi_inc_scan_progress+0x1a4/0x430 drivers/comedi/drivers.c:563
Code: b6 0c 19 84 c9 0f 85 bd 01 00 00 03 45 2c 4c 8d a5 80 00 00 00 4c 89 e1 48 c1 e9 03 0f b6 0c 19 84 c9 0f 85 cc 01 00 00 31 d2 <41> f7 34 24 41 89 17 45 89 ec eb 0f e8 cb 6e f5 f8 48 bb 00 00 00
RSP: 0018:ffffc90000007c78 EFLAGS: 00010046
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880783dca00 R08: 00000000000000ff R09: 00000000000000ff
R10: dffffc0000000000 R11: ffffed100b745e01 R12: ffff8880783dca80
R13: 0000000000000002 R14: 0000000000000000 R15: ffff8880783dca2c
FS:  0000000000000000(0000) GS:ffff888125a72000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e495832ff8 CR3: 000000002bf58000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000064b
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 comedi_buf_write_samples+0x373/0x5a0 drivers/comedi/comedi_buf.c:603
 das16m1_handler+0x213/0x4b0 drivers/comedi/drivers/das16m1.c:413
 das16m1_interrupt+0xaf/0x180 drivers/comedi/drivers/das16m1.c:470
 __handle_irq_event_percpu+0x285/0xae0 kernel/irq/handle.c:203
 handle_irq_event_percpu kernel/irq/handle.c:240 [inline]
 handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:257
 handle_edge_irq+0x23b/0xa10 kernel/irq/chip.c:855
 generic_handle_irq_desc include/linux/irqdesc.h:172 [inline]
 handle_irq arch/x86/kernel/irq.c:255 [inline]
 call_irq_handler arch/x86/kernel/irq.c:-1 [inline]
 __common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:326
 common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:319
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
RIP: 0010:finish_task_switch+0x242/0x960 kernel/sched/core.c:5117
Code: 0f 84 84 01 00 00 48 85 db 0f 85 ab 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 38 f5 d4 09 e8 f3 76 37 00 fb 4c 8b 65 c0 <49> 8d bc 24 60 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000bc17958 EFLAGS: 00000282
RAX: de6d736f9a9f3500 RBX: 0000000000000000 RCX: de6d736f9a9f3500
RDX: 0000000000000000 RSI: ffffffff8da8c2f6 RDI: ffffffff8be14f60
RBP: ffffc9000bc179b0 R08: ffffffff8fbf8477 R09: 1ffffffff1f7f08e
R10: dffffc0000000000 R11: fffffbfff1f7f08f R12: ffff888031fe5b80
R13: dffffc0000000000 R14: ffffffff8e095300 R15: ffff8880b863af58
 context_switch kernel/sched/core.c:5266 [inline]
 __schedule+0x183e/0x4ed0 kernel/sched/core.c:6871
 __schedule_loop kernel/sched/core.c:6953 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6968
 worker_thread+0xbde/0xee0 kernel/workqueue.c:3440
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:comedi_inc_scan_progress+0x1a4/0x430 drivers/comedi/drivers.c:563
Code: b6 0c 19 84 c9 0f 85 bd 01 00 00 03 45 2c 4c 8d a5 80 00 00 00 4c 89 e1 48 c1 e9 03 0f b6 0c 19 84 c9 0f 85 cc 01 00 00 31 d2 <41> f7 34 24 41 89 17 45 89 ec eb 0f e8 cb 6e f5 f8 48 bb 00 00 00
RSP: 0018:ffffc90000007c78 EFLAGS: 00010046
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880783dca00 R08: 00000000000000ff R09: 00000000000000ff
R10: dffffc0000000000 R11: ffffed100b745e01 R12: ffff8880783dca80
R13: 0000000000000002 R14: 0000000000000000 R15: ffff8880783dca2c
FS:  0000000000000000(0000) GS:ffff888125a72000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e495832ff8 CR3: 000000002bf58000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000064b
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b6 0c                	mov    $0xc,%dh
   2:	19 84 c9 0f 85 bd 01 	sbb    %eax,0x1bd850f(%rcx,%rcx,8)
   9:	00 00                	add    %al,(%rax)
   b:	03 45 2c             	add    0x2c(%rbp),%eax
   e:	4c 8d a5 80 00 00 00 	lea    0x80(%rbp),%r12
  15:	4c 89 e1             	mov    %r12,%rcx
  18:	48 c1 e9 03          	shr    $0x3,%rcx
  1c:	0f b6 0c 19          	movzbl (%rcx,%rbx,1),%ecx
  20:	84 c9                	test   %cl,%cl
  22:	0f 85 cc 01 00 00    	jne    0x1f4
  28:	31 d2                	xor    %edx,%edx
* 2a:	41 f7 34 24          	divl   (%r12) <-- trapping instruction
  2e:	41 89 17             	mov    %edx,(%r15)
  31:	45 89 ec             	mov    %r13d,%r12d
  34:	eb 0f                	jmp    0x45
  36:	e8 cb 6e f5 f8       	call   0xf8f56f06
  3b:	48                   	rex.W
  3c:	bb                   	.byte 0xbb
  3d:	00 00                	add    %al,(%rax)