ntfs3(loop9): Failed to initialize $Extend/$Reparse.
=====================================================
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:795
 iomap_dio_rw+0x5d/0x180 fs/iomap/direct-io.c:890
 ntfs_file_read_iter+0x1081/0x13b0 fs/ntfs3/file.c:886
 copy_splice_read+0xa01/0x1170 fs/splice.c:362
 do_splice_read fs/splice.c:979 [inline]
 splice_direct_to_actor+0x787/0x1560 fs/splice.c:1084
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x1e0/0x350 fs/splice.c:1228
 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372
 __do_compat_sys_sendfile fs/read_write.c:1454 [inline]
 __se_compat_sys_sendfile fs/read_write.c:1437 [inline]
 __ia32_compat_sys_sendfile+0x385/0x4e0 fs/read_write.c:1437
 ia32_sys_call+0x344b/0x4360 arch/x86/include/generated/asm/syscalls_32.h:188
 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: 17806 Comm: syz.9.2921 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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