/dev/rnullb0: Can't open blockdev
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1553 at drivers/iommu/iommufd/io_pagetable.c:283 iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:283 [inline]
WARNING: CPU: 1 PID: 1553 at drivers/iommu/iommufd/io_pagetable.c:283 iopt_map_pages+0xce7/0xda0 drivers/iommu/iommufd/io_pagetable.c:367
Modules linked in:
CPU: 1 UID: 0 PID: 1553 Comm: syz.1.10178 Not tainted 6.16.0-rc2-syzkaller-00378-gb67ec639010f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:283 [inline]
RIP: 0010:iopt_map_pages+0xce7/0xda0 drivers/iommu/iommufd/io_pagetable.c:367
Code: 89 d8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 4e f6 17 06 cc e8 c8 94 68 fc 90 0f 0b 90 e9 ca f7 ff ff e8 ba 94 68 fc 90 <0f> 0b 90 e9 88 f5 ff ff e8 2c 1b 15 06 44 89 f1 80 e1 07 80 c1 03
RSP: 0018:ffffc900040e7880 EFLAGS: 00010283
RAX: ffffffff8557f866 RBX: 00000000ffffffea RCX: 0000000000080000
RDX: ffffc90014c00000 RSI: 00000000000003db RDI: 00000000000003dc
RBP: ffffc900040e7ab0 R08: ffff88802ce8bc00 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: ffffc900040e7b70
R13: dffffc0000000000 R14: ffff8880273b4010 R15: ffffc900040e7ce0
FS:  00007fe8613976c0(0000) GS:ffff888125b1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c45cf18 CR3: 000000004a3c4000 CR4: 00000000003526f0
DR0: 000000000000634b DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iopt_map_common+0x2bb/0x4f0 drivers/iommu/iommufd/io_pagetable.c:411
 iopt_map_user_pages+0xbc/0xd0 drivers/iommu/iommufd/io_pagetable.c:452
 iommufd_ioas_map+0x392/0x4c0 drivers/iommu/iommufd/ioas.c:276
 iommufd_fops_ioctl+0x446/0x520 drivers/iommu/iommufd/main.c:419
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe86058e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe861397038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe8607b5fa0 RCX: 00007fe86058e929
RDX: 0000200000000080 RSI: 0000000000003b85 RDI: 0000000000000003
RBP: 00007fe860610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe8607b5fa0 R15: 00007ffe823bf048
 </TASK>