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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_readahead+0xa98/0x1110 fs/iomap/buffered-io.c:653
 ntfs_readahead+0x26f/0x290 fs/ntfs3/inode.c:721
 read_pages+0x15c/0xe40 mm/readahead.c:163
 page_cache_ra_unbounded+0xd0e/0x1080 mm/readahead.c:304
 do_page_cache_ra mm/readahead.c:334 [inline]
 page_cache_ra_order+0x1411/0x16f0 mm/readahead.c:538
 page_cache_sync_ra+0xb96/0x11b0 mm/readahead.c:629
 filemap_get_pages+0xcb2/0x3d30 mm/filemap.c:2690
 filemap_read+0x5d2/0x2300 mm/filemap.c:2800
 generic_file_read_iter+0x10c/0xae0 mm/filemap.c:2992
 ntfs_file_read_iter+0x91f/0x13b0 fs/ntfs3/file.c:857
 copy_splice_read+0xa01/0x1170 fs/splice.c:363
 do_splice_read fs/splice.c:981 [inline]
 splice_direct_to_actor+0x787/0x1560 fs/splice.c:1086
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x1e0/0x350 fs/splice.c:1230
 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: 1 UID: 0 PID: 18404 Comm: syz.2.5026 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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