ntfs3: loop1: Failed to initialize $Extend/$ObjId. ===================================================== BUG: KMSAN: uninit-value in longest_match_std+0x5d9/0xe00 fs/ntfs3/lznt.c:60 longest_match_std+0x5d9/0xe00 fs/ntfs3/lznt.c:60 compress_chunk fs/ntfs3/lznt.c:170 [inline] compress_lznt+0x41b/0xef0 fs/ntfs3/lznt.c:336 ni_write_frame+0xf89/0x1c80 fs/ntfs3/frecord.c:2839 ntfs_compress_write+0x2521/0x3b70 fs/ntfs3/file.c:994 ntfs_file_write_iter+0x89b/0xd30 fs/ntfs3/file.c:1080 call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x15c0 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __ia32_sys_write+0x91/0xd0 fs/read_write.c:646 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4449 alloc_pages+0xd01/0x1040 folio_alloc+0x42/0x120 mm/mempolicy.c:2307 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:976 __filemap_get_folio+0xa76/0x1450 mm/filemap.c:1936 pagecache_get_page+0x4a/0x2e0 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:723 [inline] ntfs_get_frame_pages+0xdc/0x9f0 fs/ntfs3/file.c:793 ntfs_compress_write+0x1b0b/0x3b70 fs/ntfs3/file.c:943 ntfs_file_write_iter+0x89b/0xd30 fs/ntfs3/file.c:1080 call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x15c0 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __ia32_sys_write+0x91/0xd0 fs/read_write.c:646 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 CPU: 0 PID: 5697 Comm: syz-executor.1 Not tainted 6.6.0-rc5-syzkaller-00171-gce583d5fb9d3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 =====================================================