[syzbot] [iommu?] WARNING in iopt_map_pages

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 32f88d65f01b Merge tag 'linux_kselftest-fixes-6.10-rc3' of..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1360240a980000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0e2e3f7ede77526
dashboard link: https://syzkaller.appspot.com/bug?extid=16073ebbc4c64b819b47
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=176155f2980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ef6d64980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/02b9da12baef/disk-32f88d65.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0f0b1ac64a11/vmlinux-32f88d65.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d97bebf9fd91/bzImage-32f88d65.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+16073e...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5091 at drivers/iommu/iommufd/io_pagetable.c:268 iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:268 [inline]
WARNING: CPU: 0 PID: 5091 at drivers/iommu/iommufd/io_pagetable.c:268 iopt_map_pages+0xf95/0x1050 drivers/iommu/iommufd/io_pagetable.c:352
Modules linked in:
CPU: 0 PID: 5091 Comm: syz-executor391 Not tainted 6.10.0-rc2-syzkaller-00022-g32f88d65f01b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:268 [inline]
RIP: 0010:iopt_map_pages+0xf95/0x1050 drivers/iommu/iommufd/io_pagetable.c:352
Code: fc e9 a4 f3 ff ff e8 9a 9f 4b fc 41 be e4 ff ff ff e9 8a f3 ff ff e8 8a 9f 4b fc 90 0f 0b 90 e9 37 f5 ff ff e8 7c 9f 4b fc 90 <0f> 0b 90 e9 68 f3 ff ff 48 c7 c1 6c 78 ad 8f 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90002d4f9e0 EFLAGS: 00010293
RAX: ffffffff854a7704 RBX: 00000000ffffffef RCX: ffff88801978bc00
RDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000
RBP: ffffc90002d4fc50 R08: ffffffff854a7290 R09: ffffffff854a70a2
R10: 0000000000000002 R11: ffff88801978bc00 R12: ffff888021c4b010
R13: 0000000000000000 R14: 1ffff920005a9f68 R15: ffffc90002d4fd00
FS: 0000555563931380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 0000000073cd8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
iommufd_ioas_copy+0x610/0x7b0 drivers/iommu/iommufd/ioas.c:274
iommufd_fops_ioctl+0x4d9/0x5a0 drivers/iommu/iommufd/main.c:421
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/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f83aa0f1b39
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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:00007ffdd80781a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f83aa0f1b39
RDX: 0000000020000140 RSI: 0000000000003b83 RDI: 0000000000000003
RBP: 00007f83aa1645f0 R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
</TASK>


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