------------[ cut here ]------------
WARNING: CPU: 1 PID: 7637 at drivers/iommu/iommufd/device.c:344 iommufd_hw_pagetable_detach+0x2cb/0x480 drivers/iommu/iommufd/device.c:344
Modules linked in:
CPU: 1 PID: 7637 Comm: syz-executor.4 Not tainted 6.3.0-rc5-next-20230403-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:iommufd_hw_pagetable_detach+0x2cb/0x480 drivers/iommu/iommufd/device.c:344
Code: f3 fc 49 8d 7d 70 be ff ff ff ff e8 4f 3d 76 05 31 ff 41 89 c5 89 c6 e8 43 49 f3 fc 45 85 ed 0f 85 ee fd ff ff e8 15 4d f3 fc <0f> 0b e9 e2 fd ff ff e8 09 4d f3 fc 49 8d bd a0 00 00 00 48 b8 00
RSP: 0018:ffffc90005b3fb30 EFLAGS: 00010212
RAX: 0000000000004d62 RBX: ffff888024020e00 RCX: ffffc900060a1000
RDX: 0000000000040000 RSI: ffffffff848ff48b RDI: 0000000000000005
RBP: ffff888024020eb0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888024021400
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880240214c0
FS:  00007f0e41be8700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33121000 CR3: 000000002a00c000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 iommufd_hw_pagetable_alloc+0x646/0x800 drivers/iommu/iommufd/hw_pagetable.c:114
 iommufd_device_auto_get_domain drivers/iommu/iommufd/device.c:500 [inline]
 iommufd_device_change_pt+0x570/0xb30 drivers/iommu/iommufd/device.c:553
 iommufd_device_attach+0x27/0xd0 drivers/iommu/iommufd/device.c:591
 iommufd_test_mock_domain drivers/iommu/iommufd/selftest.c:439 [inline]
 iommufd_test+0x81c/0x2ef0 drivers/iommu/iommufd/selftest.c:987
 iommufd_fops_ioctl+0x317/0x4b0 drivers/iommu/iommufd/main.c:351
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0e40e8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0e41be8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0e40fabf80 RCX: 00007f0e40e8c169
RDX: 0000000020000080 RSI: 0000000000003ba0 RDI: 0000000000000003
RBP: 00007f0e40ee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc9b3e8dcf R14: 00007f0e41be8300 R15: 0000000000022000
 </TASK>