=====================================================
BUG: KMSAN: uninit-value in longest_match_std+0x5d9/0xe00 fs/ntfs3/lznt.c:60
 longest_match_std+0x5d9/0xe00 fs/ntfs3/lznt.c:60
 compress_chunk fs/ntfs3/lznt.c:170 [inline]
 compress_lznt+0x41b/0xef0 fs/ntfs3/lznt.c:336
 ni_write_frame+0xf90/0x1c90 fs/ntfs3/frecord.c:2835
 ntfs_compress_write+0x2634/0x3be0 fs/ntfs3/file.c:966
 ntfs_file_write_iter+0x89b/0xd30 fs/ntfs3/file.c:1054
 do_iter_write+0x605/0x1310 fs/read_write.c:860
 vfs_writev+0x323/0x7a0 fs/read_write.c:933
 do_pwritev fs/read_write.c:1030 [inline]
 __do_compat_sys_pwritev2 fs/read_write.c:1176 [inline]
 __se_compat_sys_pwritev2+0x2a8/0x490 fs/read_write.c:1168
 __ia32_compat_sys_pwritev2+0x119/0x1a0 fs/read_write.c:1168
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4791
 alloc_pages+0xd01/0x1040
 folio_alloc+0x42/0x120 mm/mempolicy.c:2289
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:976
 __filemap_get_folio+0x908/0x13a0 mm/filemap.c:1965
 pagecache_get_page+0x4e/0x200 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:635 [inline]
 ntfs_get_frame_pages+0xdc/0xa00 fs/ntfs3/file.c:764
 ntfs_compress_write+0x1c25/0x3be0 fs/ntfs3/file.c:915
 ntfs_file_write_iter+0x89b/0xd30 fs/ntfs3/file.c:1054
 do_iter_write+0x605/0x1310 fs/read_write.c:860
 vfs_writev+0x323/0x7a0 fs/read_write.c:933
 do_pwritev fs/read_write.c:1030 [inline]
 __do_compat_sys_pwritev2 fs/read_write.c:1176 [inline]
 __se_compat_sys_pwritev2+0x2a8/0x490 fs/read_write.c:1168
 __ia32_compat_sys_pwritev2+0x119/0x1a0 fs/read_write.c:1168
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 5597 Comm: syz-executor.0 Not tainted 6.4.0-rc4-syzkaller-g2741f1b02117 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
=====================================================