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-rw-r--r--fs/ntfs/inode.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 0acd1f02b..97d34de2a 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -1854,6 +1854,13 @@ int ntfs_read_inode_mount(struct inode *vi)
goto err_out;
}
+ /* Sanity check offset to the first attribute */
+ if (le16_to_cpu(m->attrs_offset) >= le32_to_cpu(m->bytes_allocated)) {
+ ntfs_error(sb, "Incorrect mft offset to the first attribute %u in superblock.",
+ le16_to_cpu(m->attrs_offset));
+ goto err_out;
+ }
+
/* Need this to sanity check attribute list references to $MFT. */
vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);