linux-kernel - [PATCH AUTOSEL 5.15 21/24] fs/ntfs3: Mark ntfs dirty when on-disk struct is corrupted

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Message-Id: <20230724013325.2332084-21-sashal@kernel.org>
Date:   Sun, 23 Jul 2023 21:33:22 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.15 21/24] fs/ntfs3: Mark ntfs dirty when on-disk struct is corrupted

From: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>

[ Upstream commit e0f363a98830e8d7d70fbaf91c07ae0b7c57aafe ]

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/ntfs3/fsntfs.c  | 2 +-
 fs/ntfs3/index.c   | 6 ++++++
 fs/ntfs3/ntfs_fs.h | 2 ++
 fs/ntfs3/record.c  | 6 ++++++
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index 3c823613de97d..0ae70010b01d3 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -154,7 +154,7 @@ int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
 	/* Check errors. */
 	if ((fo & 1) || fo + fn * sizeof(short) > SECTOR_SIZE || !fn-- ||
 	    fn * SECTOR_SIZE > bytes) {
-		return -EINVAL; /* Native chkntfs returns ok! */
+		return -E_NTFS_CORRUPT;
 	}
 
 	/* Get fixup pointer. */
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index 1ae3b310869d6..a74812e2da083 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -1044,6 +1044,12 @@ int indx_read(struct ntfs_index *indx, struct ntfs_inode *ni, CLST vbn,
 	*node = in;
 
 out:
+	if (err == -E_NTFS_CORRUPT) {
+		ntfs_inode_err(&ni->vfs_inode, "directory corrupted");
+		ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_ERROR);
+		err = -EINVAL;
+	}
+
 	if (ib != in->index)
 		kfree(ib);
 
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index e571e7643596e..f4ec920616582 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -54,6 +54,8 @@ enum utf16_endian;
 #define E_NTFS_NONRESIDENT		556
 /* NTFS specific error code about punch hole. */
 #define E_NTFS_NOTALIGNED		557
+/* NTFS specific error code when on-disk struct is corrupted. */
+#define E_NTFS_CORRUPT			558
 
 
 /* sbi->flags */
diff --git a/fs/ntfs3/record.c b/fs/ntfs3/record.c
index 3d222b1c8f038..938fc286963f2 100644
--- a/fs/ntfs3/record.c
+++ b/fs/ntfs3/record.c
@@ -180,6 +180,12 @@ int mi_read(struct mft_inode *mi, bool is_mft)
 	return 0;
 
 out:
+	if (err == -E_NTFS_CORRUPT) {
+		ntfs_err(sbi->sb, "mft corrupted");
+		ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
+		err = -EINVAL;
+	}
+
 	return err;
 }
 
-- 
2.39.2