loop5: detected capacity change from 0 to 4096
=====================================================
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
 iter_file_splice_write+0x12f1/0x20f0 fs/splice.c:738
 ntfs_file_splice_write+0x21d/0x370 fs/ntfs3/file.c:1441
 do_splice_from fs/splice.c:938 [inline]
 do_splice+0x1fe5/0x30e0 fs/splice.c:1351
 __do_splice fs/splice.c:1433 [inline]
 __do_sys_splice fs/splice.c:1636 [inline]
 __se_sys_splice+0x549/0x8c0 fs/splice.c:1618
 __ia32_sys_splice+0x112/0x1a0 fs/splice.c:1618
 ia32_sys_call+0xca4/0x4360 arch/x86/include/generated/asm/syscalls_32.h:314
 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

Uninit was created at:
 __alloc_frozen_pages_noprof+0x6df/0xf50 mm/page_alloc.c:5267
 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
 iter_file_splice_write+0x12f1/0x20f0 fs/splice.c:738
 ntfs_file_splice_write+0x21d/0x370 fs/ntfs3/file.c:1441
 do_splice_from fs/splice.c:938 [inline]
 do_splice+0x1fe5/0x30e0 fs/splice.c:1351
 __do_splice fs/splice.c:1433 [inline]
 __do_sys_splice fs/splice.c:1636 [inline]
 __se_sys_splice+0x549/0x8c0 fs/splice.c:1618
 __ia32_sys_splice+0x112/0x1a0 fs/splice.c:1618
 ia32_sys_call+0xca4/0x4360 arch/x86/include/generated/asm/syscalls_32.h:314
 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

CPU: 1 UID: 0 PID: 20795 Comm: syz.5.3705 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
=====================================================