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BUG: KMSAN: uninit-value in batch_add_pfn_num drivers/iommu/iommufd/pages.c:365 [inline]
BUG: KMSAN: uninit-value in batch_add_pfn drivers/iommu/iommufd/pages.c:398 [inline]
BUG: KMSAN: uninit-value in batch_from_pages drivers/iommu/iommufd/pages.c:658 [inline]
BUG: KMSAN: uninit-value in pfn_reader_fill_span drivers/iommu/iommufd/pages.c:1220 [inline]
BUG: KMSAN: uninit-value in pfn_reader_next+0x1d4c/0x3e40 drivers/iommu/iommufd/pages.c:1247
 batch_add_pfn_num drivers/iommu/iommufd/pages.c:365 [inline]
 batch_add_pfn drivers/iommu/iommufd/pages.c:398 [inline]
 batch_from_pages drivers/iommu/iommufd/pages.c:658 [inline]
 pfn_reader_fill_span drivers/iommu/iommufd/pages.c:1220 [inline]
 pfn_reader_next+0x1d4c/0x3e40 drivers/iommu/iommufd/pages.c:1247
 pfn_reader_first+0xbdc/0xcc0 drivers/iommu/iommufd/pages.c:1354
 iopt_pages_rw_slow+0x80/0x1010 drivers/iommu/iommufd/pages.c:2259
 iopt_pages_rw_access+0x4a8/0xd10 drivers/iommu/iommufd/pages.c:2368
 iommufd_access_rw+0x547/0x980 drivers/iommu/iommufd/device.c:1536
 iommufd_test_access_rw drivers/iommu/iommufd/selftest.c:1694 [inline]
 iommufd_test+0xb2df/0xc940 drivers/iommu/iommufd/selftest.c:2137
 iommufd_fops_ioctl+0x82a/0x9e0 drivers/iommu/iommufd/main.c:533
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0x23c/0x400 fs/ioctl.c:583
 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:583
 x64_sys_call+0x18a7/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable pfns created at:
 iopt_pages_rw_slow+0x54/0x1010 drivers/iommu/iommufd/pages.c:2254
 iopt_pages_rw_access+0x4a8/0xd10 drivers/iommu/iommufd/pages.c:2368

CPU: 1 UID: 0 PID: 21663 Comm: syz.5.4703 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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