=====================================================
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+0xff4/0x1f10 fs/ntfs3/frecord.c:2779
 ntfs_compress_write+0x2768/0x3950 fs/ntfs3/file.c:1107
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1224
 __kernel_write_iter+0x6fa/0xdd0 fs/read_write.c:619
 __kernel_write+0xc8/0x100 fs/read_write.c:639
 __dump_emit fs/coredump.c:1218 [inline]
 dump_emit+0x3a0/0x5d0 fs/coredump.c:1256
 elf_core_dump+0x5390/0x6c70 fs/binfmt_elf.c:2037
 coredump_write+0x20db/0x2d50 fs/coredump.c:1049
 vfs_coredump+0x4370/0x6020 fs/coredump.c:1168
 get_signal+0x20ab/0x2a20 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xbf0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:40 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x62/0xa0 kernel/entry/common.c:73
 irqentry_exit+0x16/0x60 kernel/entry/common.c:177
 exc_page_fault+0x76/0xb0 arch/x86/mm/fault.c:1535
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623

Uninit was created at:
 __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:5171
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
 alloc_pages_noprof mm/mempolicy.c:2507 [inline]
 folio_alloc_noprof+0x109/0x360 mm/mempolicy.c:2517
 filemap_alloc_folio_noprof+0x9d/0x420 mm/filemap.c:1007
 __filemap_get_folio+0xb45/0x1930 mm/filemap.c:1981
 ntfs_get_frame_pages+0xdc/0x5f0 fs/ntfs3/file.c:903
 ntfs_compress_write+0x1cf4/0x3950 fs/ntfs3/file.c:1056
 ntfs_file_write_iter+0xf39/0x10d0 fs/ntfs3/file.c:1224
 __kernel_write_iter+0x6fa/0xdd0 fs/read_write.c:619
 __kernel_write+0xc8/0x100 fs/read_write.c:639
 __dump_emit fs/coredump.c:1218 [inline]
 dump_emit+0x3a0/0x5d0 fs/coredump.c:1256
 elf_core_dump+0x5390/0x6c70 fs/binfmt_elf.c:2037
 coredump_write+0x20db/0x2d50 fs/coredump.c:1049
 vfs_coredump+0x4370/0x6020 fs/coredump.c:1168
 get_signal+0x20ab/0x2a20 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xbf0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:40 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x62/0xa0 kernel/entry/common.c:73
 irqentry_exit+0x16/0x60 kernel/entry/common.c:177
 exc_page_fault+0x76/0xb0 arch/x86/mm/fault.c:1535
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623

CPU: 1 UID: 0 PID: 9838 Comm: syz.5.887 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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