ntfs3: loop2: Mark volume as dirty due to NTFS errors ===================================================== 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+0xf90/0x1c90 fs/ntfs3/frecord.c:2835 ntfs_compress_write+0x2634/0x3be0 fs/ntfs3/file.c:966 ntfs_file_write_iter+0x89b/0xd30 fs/ntfs3/file.c:1054 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8f9/0x1490 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:4791 alloc_pages+0xd01/0x1040 folio_alloc+0x42/0x120 mm/mempolicy.c:2289 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:976 __filemap_get_folio+0x908/0x13a0 mm/filemap.c:1971 pagecache_get_page+0x4e/0x200 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:635 [inline] ntfs_get_frame_pages+0xdc/0xa00 fs/ntfs3/file.c:764 ntfs_compress_write+0x1c25/0x3be0 fs/ntfs3/file.c:915 ntfs_file_write_iter+0x89b/0xd30 fs/ntfs3/file.c:1054 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8f9/0x1490 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: 1 PID: 5276 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller-g257152fe29be #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 =====================================================