=====================================================
BUG: KMSAN: uninit-value in get_match_len fs/ntfs3/lznt.c:43 [inline]
BUG: KMSAN: uninit-value in longest_match_std+0x588/0xee0 fs/ntfs3/lznt.c:64
 get_match_len fs/ntfs3/lznt.c:43 [inline]
 longest_match_std+0x588/0xee0 fs/ntfs3/lznt.c:64
 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+0x276e/0x3950 fs/ntfs3/file.c:1200
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1317
 __kernel_write_iter+0x6fa/0xdd0 fs/read_write.c:619
 __kernel_write+0xc8/0x100 fs/read_write.c:639
 __dump_emit fs/coredump.c:1220 [inline]
 dump_emit+0x3a0/0x5d0 fs/coredump.c:1258
 elf_core_dump+0x53c8/0x6cb0 fs/binfmt_elf.c:2063
 coredump_write+0x20b6/0x2d60 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x79b7/0x8cf0 fs/coredump.c:1200
 get_signal+0x20a9/0x2a20 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xc00 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0xf2/0x720 kernel/entry/common.c:196
 exc_page_fault+0x82/0xc0 arch/x86/mm/fault.c:1535
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:618

Uninit was created at:
 __alloc_frozen_pages_noprof+0x421/0xab0 mm/page_alloc.c:5233
 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+0x109/0x360 mm/mempolicy.c:2587
 filemap_alloc_folio_noprof+0xda/0x480 mm/filemap.c:1013
 __filemap_get_folio_mpol+0xb4f/0x1960 mm/filemap.c:2006
 __filemap_get_folio include/linux/pagemap.h:763 [inline]
 ntfs_get_frame_pages+0xdf/0x600 fs/ntfs3/file.c:996
 ntfs_compress_write+0x1cf7/0x3950 fs/ntfs3/file.c:1149
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1317
 __kernel_write_iter+0x6fa/0xdd0 fs/read_write.c:619
 __kernel_write+0xc8/0x100 fs/read_write.c:639
 __dump_emit fs/coredump.c:1220 [inline]
 dump_emit+0x3a0/0x5d0 fs/coredump.c:1258
 elf_core_dump+0x53c8/0x6cb0 fs/binfmt_elf.c:2063
 coredump_write+0x20b6/0x2d60 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x79b7/0x8cf0 fs/coredump.c:1200
 get_signal+0x20a9/0x2a20 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xc00 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0xf2/0x720 kernel/entry/common.c:196
 exc_page_fault+0x82/0xc0 arch/x86/mm/fault.c:1535
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:618

CPU: 0 UID: 0 PID: 11847 Comm: syz.7.1208 Tainted: G        W    L      syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
=====================================================