------------[ cut here ]------------
!iommu_table->driver_ops || !iommu_table->driver_ops->change_top || !iommu_table->driver_ops->get_top_lock
WARNING: drivers/iommu/generic_pt/fmt/../iommu_pt.h:1249 at pt_iommu_amdv1_init+0xa10/0xb20 drivers/iommu/generic_pt/iommu_pt.h:1249, CPU#3: syz.7.2455/14925
Modules linked in:
CPU: 3 UID: 0 PID: 14925 Comm: syz.7.2455 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:pt_iommu_amdv1_init+0xa10/0xb20 drivers/iommu/generic_pt/iommu_pt.h:1249
Code: e8 95 a3 e7 fc e9 aa f6 ff ff e8 db 17 7b fc 89 ab 94 00 00 00 e9 15 ff ff ff e8 cb 17 7b fc e9 e4 fd ff ff e8 c1 17 7b fc 90 <0f> 0b 90 e9 19 ff ff ff bd a1 ff ff ff e9 cc fd ff ff 4c 89 cf 4c
RSP: 0018:ffffc90003fcfa68 EFLAGS: 00010283
RAX: 00000000000007dc RBX: ffff88802c544d00 RCX: ffffc900078b1000
RDX: 0000000000080000 RSI: ffffffff858db4bf RDI: ffff888030e18000
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000034 R11: 0000000000000000 R12: 0000000000000034
R13: 0000000000000040 R14: 0000000000000000 R15: 0000000000000034
FS:  00007f29c30be6c0(0000) GS:ffff8880d6642000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff68fef018 CR3: 00000000406ad000 CR4: 0000000000352ef0
DR0: 0000000080000000 DR1: 0000000000000001 DR2: fffffffffffffffe
DR3: 0000000000000006 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mock_domain_alloc_pgtable drivers/iommu/iommufd/selftest.c:491 [inline]
 mock_domain_alloc_paging_flags+0x29b/0x680 drivers/iommu/iommufd/selftest.c:548
 iommufd_hwpt_paging_alloc+0x393/0xb20 drivers/iommu/iommufd/hw_pagetable.c:149
 iommufd_hwpt_alloc+0xb46/0x1af0 drivers/iommu/iommufd/hw_pagetable.c:369
 iommufd_fops_ioctl+0x358/0x520 drivers/iommu/iommufd/main.c:533
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f29c219c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f29c30be028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f29c2415fa0 RCX: 00007f29c219c799
RDX: 0000200000000200 RSI: 0000000000003b89 RDI: 0000000000000005
RBP: 00007f29c2232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f29c2416038 R14: 00007f29c2415fa0 R15: 00007fff68feecb8
 </TASK>