divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 11395 Comm: syz-executor.4 Not tainted 6.6.0-rc7-next-20231027-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:iommufd_test_dirty drivers/iommu/iommufd/selftest.c:1193 [inline]
RIP: 0010:iommufd_test+0x1d2/0x3580 drivers/iommu/iommufd/selftest.c:1312
Code: 24 28 48 b8 00 00 00 00 00 fc ff df 0f b6 04 02 84 c0 74 09 3c 03 7f 05 e8 3b 80 f7 fc 48 8b 44 24 28 31 d2 31 ff 44 8b 6b 08 <48> f7 74 24 18 49 89 d6 48 89 d6 e8 9e 61 a0 fc 4d 85 f6 0f 85 fa
RSP: 0018:ffffc90016dafcb8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc90016dafe40 RCX: ffffc9000a627000
RDX: 0000000000000000 RSI: ffffffff84e89609 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000005 R09: 000000000000000d
R10: 000000000000000d R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90016dafe40 R15: ffffc90016dafe00
FS:  00007fefb942c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cebd14d58 CR3: 000000007d80b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iommufd_fops_ioctl+0x35a/0x4e0 drivers/iommu/iommufd/main.c:404
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7fefb867cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fefb942c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fefb879bf80 RCX: 00007fefb867cae9
RDX: 0000000020000080 RSI: 0000000000003ba0 RDI: 0000000000000003
RBP: 00007fefb86c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fefb879bf80 R15: 00007fffa13b4958
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:iommufd_test_dirty drivers/iommu/iommufd/selftest.c:1193 [inline]
RIP: 0010:iommufd_test+0x1d2/0x3580 drivers/iommu/iommufd/selftest.c:1312
Code: 24 28 48 b8 00 00 00 00 00 fc ff df 0f b6 04 02 84 c0 74 09 3c 03 7f 05 e8 3b 80 f7 fc 48 8b 44 24 28 31 d2 31 ff 44 8b 6b 08 <48> f7 74 24 18 49 89 d6 48 89 d6 e8 9e 61 a0 fc 4d 85 f6 0f 85 fa
RSP: 0018:ffffc90016dafcb8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc90016dafe40 RCX: ffffc9000a627000
RDX: 0000000000000000 RSI: ffffffff84e89609 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000005 R09: 000000000000000d
R10: 000000000000000d R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90016dafe40 R15: ffffc90016dafe00
FS:  00007fefb942c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cebd14d58 CR3: 000000007d80b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	24 28                	and    $0x28,%al
   2:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   9:	fc ff df
   c:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  10:	84 c0                	test   %al,%al
  12:	74 09                	je     0x1d
  14:	3c 03                	cmp    $0x3,%al
  16:	7f 05                	jg     0x1d
  18:	e8 3b 80 f7 fc       	call   0xfcf78058
  1d:	48 8b 44 24 28       	mov    0x28(%rsp),%rax
  22:	31 d2                	xor    %edx,%edx
  24:	31 ff                	xor    %edi,%edi
  26:	44 8b 6b 08          	mov    0x8(%rbx),%r13d
* 2a:	48 f7 74 24 18       	divq   0x18(%rsp) <-- trapping instruction
  2f:	49 89 d6             	mov    %rdx,%r14
  32:	48 89 d6             	mov    %rdx,%rsi
  35:	e8 9e 61 a0 fc       	call   0xfca061d8
  3a:	4d 85 f6             	test   %r14,%r14
  3d:	0f                   	.byte 0xf
  3e:	85 fa                	test   %edi,%edx