loop7: detected capacity change from 0 to 4096
ntfs3(loop7): ino=19, mi_enum_attr
ntfs3(loop7): Mark volume as dirty due to NTFS errors
=====================================================
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:1201
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1318
 do_iter_readv_writev+0x9e0/0xc10 fs/read_write.c:-1
 vfs_writev+0x52a/0x1500 fs/read_write.c:1059
 do_pwritev fs/read_write.c:1155 [inline]
 __do_sys_pwritev2 fs/read_write.c:1213 [inline]
 __se_sys_pwritev2+0x22f/0x470 fs/read_write.c:1204
 __x64_sys_pwritev2+0xe4/0x150 fs/read_write.c:1204
 x64_sys_call+0x10a2/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:329
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_frozen_pages_noprof+0x6f7/0x1020 mm/page_alloc.c:5272
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2485
 alloc_frozen_pages_noprof mm/mempolicy.c:2556 [inline]
 alloc_pages_noprof mm/mempolicy.c:2576 [inline]
 folio_alloc_noprof+0x108/0x360 mm/mempolicy.c:2586
 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:997
 ntfs_compress_write+0x1cf2/0x3940 fs/ntfs3/file.c:1150
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1318
 do_iter_readv_writev+0x9e0/0xc10 fs/read_write.c:-1
 vfs_writev+0x52a/0x1500 fs/read_write.c:1059
 do_pwritev fs/read_write.c:1155 [inline]
 __do_sys_pwritev2 fs/read_write.c:1213 [inline]
 __se_sys_pwritev2+0x22f/0x470 fs/read_write.c:1204
 __x64_sys_pwritev2+0xe4/0x150 fs/read_write.c:1204
 x64_sys_call+0x10a2/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:329
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 8836 Comm: syz.7.575 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
=====================================================