divide error: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 2547 Comm: syz-executor.0 Not tainted 6.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:iommufd_test_dirty drivers/iommu/iommufd/selftest.c:1093 [inline]
RIP: 0010:iommufd_test+0x7a/0x1200 drivers/iommu/iommufd/selftest.c:1198
Code: b8 08 00 00 83 f8 0d 0f 85 cc 04 00 00 49 8b 6a 18 31 d2 4c 89 14 24 49 8b 5a 28 49 8b 4a 30 4d 8b 72 20 48 89 e8 41 8b 72 08 <48> f7 f3 48 85 d2 48 89 4c 24 18 0f 85 93 0c 00 00 31 d2 4c 89 f0
RSP: 0018:ffffc90002167de8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90002167e78
RBP: 0000000000000000 R08: ffff88810dad13c0 R09: ffffc90002167e78
R10: ffffc90002167e98 R11: 0000000000000001 R12: ffffc90002167e98
R13: 0000000000000048 R14: 0000000000000000 R15: 0000000000000000
FS:  00007ff8413726c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556072da8 CR3: 000000010a3c8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iommufd_fops_ioctl+0x10f/0x1a0 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+0x8b/0xc0 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff84067cae9
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:00007ff8413720c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff84079bf80 RCX: 00007ff84067cae9
RDX: 0000000020000140 RSI: 0000000000003ba0 RDI: 0000000000000003
RBP: 00007ff8406c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007ff84079bf80 R15: 00007fffdc213eb8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:iommufd_test_dirty drivers/iommu/iommufd/selftest.c:1093 [inline]
RIP: 0010:iommufd_test+0x7a/0x1200 drivers/iommu/iommufd/selftest.c:1198
Code: b8 08 00 00 83 f8 0d 0f 85 cc 04 00 00 49 8b 6a 18 31 d2 4c 89 14 24 49 8b 5a 28 49 8b 4a 30 4d 8b 72 20 48 89 e8 41 8b 72 08 <48> f7 f3 48 85 d2 48 89 4c 24 18 0f 85 93 0c 00 00 31 d2 4c 89 f0
RSP: 0018:ffffc90002167de8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90002167e78
RBP: 0000000000000000 R08: ffff88810dad13c0 R09: ffffc90002167e78
R10: ffffc90002167e98 R11: 0000000000000001 R12: ffffc90002167e98
R13: 0000000000000048 R14: 0000000000000000 R15: 0000000000000000
FS:  00007ff8413726c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556072da8 CR3: 000000010a3c8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b8 08 00 00 83       	mov    $0x83000008,%eax
   5:	f8                   	clc
   6:	0d 0f 85 cc 04       	or     $0x4cc850f,%eax
   b:	00 00                	add    %al,(%rax)
   d:	49 8b 6a 18          	mov    0x18(%r10),%rbp
  11:	31 d2                	xor    %edx,%edx
  13:	4c 89 14 24          	mov    %r10,(%rsp)
  17:	49 8b 5a 28          	mov    0x28(%r10),%rbx
  1b:	49 8b 4a 30          	mov    0x30(%r10),%rcx
  1f:	4d 8b 72 20          	mov    0x20(%r10),%r14
  23:	48 89 e8             	mov    %rbp,%rax
  26:	41 8b 72 08          	mov    0x8(%r10),%esi
* 2a:	48 f7 f3             	div    %rbx <-- trapping instruction
  2d:	48 85 d2             	test   %rdx,%rdx
  30:	48 89 4c 24 18       	mov    %rcx,0x18(%rsp)
  35:	0f 85 93 0c 00 00    	jne    0xcce
  3b:	31 d2                	xor    %edx,%edx
  3d:	4c 89 f0             	mov    %r14,%rax