Oops: divide error: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-rc7-syzkaller-00018-g01a412d06bc5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:comedi_inc_scan_progress+0x1cc/0x340 drivers/comedi/drivers.c:556
Code: 00 00 00 03 43 2c 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e 53 01 00 00 31 d2 <f7> b3 80 00 00 00 89 53 2c e8 c6 bc ce f8 48 8d 7b 34 48 b8 00 00
RSP: 0018:ffffc90000007da0 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff888035e40400 RCX: 1ffff11006bc8090
RDX: 0000000000000000 RSI: ffffffff88ed2b38 RDI: ffff888035e40480
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124720000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000fc030 CR3: 0000000056e87000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 comedi_buf_write_samples+0x406/0x640 drivers/comedi/comedi_buf.c:603
 parport_interrupt+0xec/0x150 drivers/comedi/drivers/comedi_parport.c:218
 __handle_irq_event_percpu+0x229/0x7d0 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
 handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
 handle_edge_irq+0x28e/0xab0 kernel/irq/chip.c:797
 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
 handle_irq arch/x86/kernel/irq.c:254 [inline]
 call_irq_handler arch/x86/kernel/irq.c:266 [inline]
 __common_interrupt+0xe2/0x250 arch/x86/kernel/irq.c:292
 common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__local_bh_enable_ip+0xac/0x120 kernel/softirq.c:414
Code: 1d 89 07 53 12 65 8b 05 82 07 53 12 a9 00 ff ff 00 74 4d bf 01 00 00 00 e8 d1 00 0c 00 e8 5c c0 46 00 fb 65 8b 05 64 07 53 12 <85> c0 74 52 5b 5d e9 89 7a 0c 0a 65 8b 05 ae 45 53 12 85 c0 75 9e
RSP: 0018:ffffc90000117a98 EFLAGS: 00000202
RAX: 0000000080000000 RBX: 00000000fffffe00 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8de30036 RDI: ffffffff8c157460
RBP: ffffffff8b53a144 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90a94057 R11: 0000000000000001 R12: ffffffff8b53a320
R13: ffff8880267e4fc0 R14: ffff888026960d80 R15: 0000000000000000
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x1d4/0x3a0 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x958/0x1030 net/batman-adv/network-coding.c:722
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:comedi_inc_scan_progress+0x1cc/0x340 drivers/comedi/drivers.c:556
Code: 00 00 00 03 43 2c 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e 53 01 00 00 31 d2 <f7> b3 80 00 00 00 89 53 2c e8 c6 bc ce f8 48 8d 7b 34 48 b8 00 00
RSP: 0018:ffffc90000007da0 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff888035e40400 RCX: 1ffff11006bc8090
RDX: 0000000000000000 RSI: ffffffff88ed2b38 RDI: ffff888035e40480
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124720000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000fc030 CR3: 0000000056e87000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	03 43 2c             	add    0x2c(%rbx),%eax
   5:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
   c:	fc ff df
   f:	48 89 f9             	mov    %rdi,%rcx
  12:	48 c1 e9 03          	shr    $0x3,%rcx
  16:	0f b6 14 11          	movzbl (%rcx,%rdx,1),%edx
  1a:	84 d2                	test   %dl,%dl
  1c:	74 09                	je     0x27
  1e:	80 fa 03             	cmp    $0x3,%dl
  21:	0f 8e 53 01 00 00    	jle    0x17a
  27:	31 d2                	xor    %edx,%edx
* 29:	f7 b3 80 00 00 00    	divl   0x80(%rbx) <-- trapping instruction
  2f:	89 53 2c             	mov    %edx,0x2c(%rbx)
  32:	e8 c6 bc ce f8       	call   0xf8cebcfd
  37:	48 8d 7b 34          	lea    0x34(%rbx),%rdi
  3b:	48                   	rex.W
  3c:	b8                   	.byte 0xb8