ntfs3(loop2): ino=5, "/" mi_enum_attr
=====================================================
BUG: KMSAN: uninit-value in longest_match_std+0x627/0xee0 fs/ntfs3/lznt.c:60
 longest_match_std+0x627/0xee0 fs/ntfs3/lznt.c:60
 compress_chunk fs/ntfs3/lznt.c:170 [inline]
 compress_lznt+0x4a0/0xe90 fs/ntfs3/lznt.c:339
 ni_write_frame+0xad0/0x1510 fs/ntfs3/frecord.c:2729
 ntfs_compress_write+0x2765/0x3940 fs/ntfs3/file.c:1200
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1317
 do_iter_readv_writev+0x9e0/0xc10 fs/read_write.c:-1
 vfs_writev+0x52a/0x1500 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_compat_sys_pwritev2 fs/read_write.c:1298 [inline]
 __se_compat_sys_pwritev2 fs/read_write.c:1290 [inline]
 __ia32_compat_sys_pwritev2+0x43d/0x6b0 fs/read_write.c:1290
 ia32_sys_call+0x1544/0x4340 arch/x86/include/generated/asm/syscalls_32.h:380
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x14a/0x310 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

Uninit was created at:
 __alloc_frozen_pages_noprof+0x6df/0xf50 mm/page_alloc.c:5263
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2486
 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline]
 alloc_pages_noprof mm/mempolicy.c:2577 [inline]
 folio_alloc_noprof+0x108/0x360 mm/mempolicy.c:2587
 filemap_alloc_folio_noprof+0xd9/0x480 mm/filemap.c:1013
 __filemap_get_folio_mpol+0xb43/0x1960 mm/filemap.c:2006
 __filemap_get_folio include/linux/pagemap.h:774 [inline]
 ntfs_get_frame_pages+0xdf/0x5f0 fs/ntfs3/file.c:996
 ntfs_compress_write+0x1cf2/0x3940 fs/ntfs3/file.c:1149
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1317
 do_iter_readv_writev+0x9e0/0xc10 fs/read_write.c:-1
 vfs_writev+0x52a/0x1500 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_compat_sys_pwritev2 fs/read_write.c:1298 [inline]
 __se_compat_sys_pwritev2 fs/read_write.c:1290 [inline]
 __ia32_compat_sys_pwritev2+0x43d/0x6b0 fs/read_write.c:1290
 ia32_sys_call+0x1544/0x4340 arch/x86/include/generated/asm/syscalls_32.h:380
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x14a/0x310 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

CPU: 0 UID: 0 PID: 9989 Comm: syz.2.1421 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
=====================================================