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| author | DaeMyung Kang <charsyam@gmail.com> | 2026-05-10 20:11:14 +0300 |
|---|---|---|
| committer | Namjae Jeon <linkinjeon@kernel.org> | 2026-05-11 17:30:48 +0300 |
| commit | 2beaa98b46c4cc90ed8a674f27a586d7f547bbe5 (patch) | |
| tree | 9f28ba568d411b71521fc45e2a2e7eec103d5b51 | |
| parent | 8c16c1c00167134f15ca8e9defdf38b1cac08c36 (diff) | |
| download | linux-2beaa98b46c4cc90ed8a674f27a586d7f547bbe5.tar.xz | |
ntfs: restore $MFT mirror contents check
check_mft_mirror() still computes the number of bytes to validate in each
mirrored MFT record, but the actual comparison against $MFTMirr was dropped
when the superblock code was updated.
As a result, mount misses a stale or inconsistent $MFTMirr as long as both
records pass the structural baad-record checks. Restore the comparison and
log an error when the primary $MFT record differs from its mirror copy.
Returning false lets the existing mount error handling mark the volume as
having NTFS errors and, with on_errors=remount-ro, continue read-only. The
default on_errors=continue mount policy still allows the mount to proceed.
Fixes: 6251f0b0de7d ("ntfs: update super block operations")
Signed-off-by: DaeMyung Kang <charsyam@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
| -rw-r--r-- | fs/ntfs/super.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c index d282cf6e712e..9e321cc2febe 100644 --- a/fs/ntfs/super.c +++ b/fs/ntfs/super.c @@ -993,6 +993,13 @@ mft_unmap_out: ntfs_is_baad_recordp((__le32 *)kmirr)) bytes = vol->mft_record_size; } + /* Compare the two records. */ + if (memcmp(kmft, kmirr, bytes)) { + ntfs_error(sb, + "$MFT and $MFTMirr record %i do not match. Run chkdsk.", + i); + goto mm_unmap_out; + } kmft += vol->mft_record_size; kmirr += vol->mft_record_size; } while (++i < vol->mftmirr_size); |