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BUG: KMSAN: uninit-value in ntfs_iomap_begin+0x8c0/0x1460 fs/ntfs3/inode.c:825
 ntfs_iomap_begin+0x8c0/0x1460 fs/ntfs3/inode.c:825
 iomap_iter+0x9b7/0x1540 fs/iomap/iter.c:110
 __iomap_dio_rw+0x2891/0x3a10 fs/iomap/direct-io.c:782
 iomap_dio_rw+0x5d/0x180 fs/iomap/direct-io.c:877
 ntfs_file_read_iter+0x1081/0x13b0 fs/ntfs3/file.c:886
 do_iter_readv_writev+0x9e0/0xc10 fs/read_write.c:-1
 vfs_readv+0x34a/0xf30 fs/read_write.c:1020
 do_preadv fs/read_write.c:1134 [inline]
 __do_compat_sys_preadv2 fs/read_write.c:1260 [inline]
 __se_compat_sys_preadv2 fs/read_write.c:1251 [inline]
 __ia32_compat_sys_preadv2+0x43d/0x6b0 fs/read_write.c:1251
 ia32_sys_call+0x2925/0x4360 arch/x86/include/generated/asm/syscalls_32.h:379
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Local variable lcn created at:
 ntfs_iomap_begin+0x15d/0x1460 fs/ntfs3/inode.c:786
 iomap_iter+0x9b7/0x1540 fs/iomap/iter.c:110

CPU: 0 UID: 0 PID: 6098 Comm: syz.3.41 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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