Oops: divide error: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:comedi_inc_scan_progress+0x1a4/0x430 drivers/comedi/drivers.c:556 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 9b 84 cf f8 48 bb 00 00 00 RSP: 0018:ffffc90000007c80 EFLAGS: 00010046 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888025fe0a00 R08: dffffc0000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100f13ac01 R12: ffff888025fe0a80 R13: 0000000000000002 R14: 0000000000000000 R15: ffff888025fe0a2c FS: 0000000000000000(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3121bff8 CR3: 00000000329fa000 CR4: 00000000003526f0 Call Trace: comedi_buf_write_samples+0x373/0x5a0 drivers/comedi/comedi_buf.c:603 parport_interrupt+0xf3/0x150 drivers/comedi/drivers/comedi_parport.c:218 __handle_irq_event_percpu+0x28c/0x980 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x267/0x9e0 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+0x143/0x250 arch/x86/kernel/irq.c:292 common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82 Code: d3 e8 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 ba 28 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffffff8e207d80 EFLAGS: 000002c2 RAX: 5e816ca893454200 RBX: ffffffff8196da38 RCX: 5e816ca893454200 RDX: 0000000000000001 RSI: ffffffff8dc6a0fe RDI: ffffffff8c04d400 RBP: ffffffff8e207ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fe3cf30 R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1c52a58 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:757 default_idle_call+0x74/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x1e8/0x510 kernel/sched/idle.c:330 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428 rest_init+0x2de/0x300 init/main.c:744 start_kernel+0x47d/0x500 init/main.c:1097 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:307 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:288 common_startup_64+0x13e/0x147 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:comedi_inc_scan_progress+0x1a4/0x430 drivers/comedi/drivers.c:556 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 9b 84 cf f8 48 bb 00 00 00 RSP: 0018:ffffc90000007c80 EFLAGS: 00010046 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888025fe0a00 R08: dffffc0000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100f13ac01 R12: ffff888025fe0a80 R13: 0000000000000002 R14: 0000000000000000 R15: ffff888025fe0a2c FS: 0000000000000000(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3121bff8 CR3: 00000000329fa000 CR4: 00000000003526f0 ---------------- 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 9b 84 cf f8 call 0xf8cf84d6 3b: 48 rex.W 3c: bb .byte 0xbb 3d: 00 00 add %al,(%rax)