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-rw-r--r--fs/ntfs3/fsntfs.c41
1 files changed, 35 insertions, 6 deletions
diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index 873b1434a..4c2d079b3 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -976,6 +976,30 @@ static inline __le32 security_hash(const void *sd, size_t bytes)
return cpu_to_le32(hash);
}
+/*
+ * simple wrapper for sb_bread_unmovable.
+ */
+struct buffer_head *ntfs_bread(struct super_block *sb, sector_t block)
+{
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+ struct buffer_head *bh;
+
+ if (unlikely(block >= sbi->volume.blocks)) {
+ /* prevent generic message "attempt to access beyond end of device" */
+ ntfs_err(sb, "try to read out of volume at offset 0x%llx",
+ (u64)block << sb->s_blocksize_bits);
+ return NULL;
+ }
+
+ bh = sb_bread_unmovable(sb, block);
+ if (bh)
+ return bh;
+
+ ntfs_err(sb, "failed to read volume at offset 0x%llx",
+ (u64)block << sb->s_blocksize_bits);
+ return NULL;
+}
+
int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer)
{
struct block_device *bdev = sb->s_bdev;
@@ -1650,6 +1674,7 @@ struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST rno, bool dir)
out:
if (err) {
+ make_bad_inode(inode);
iput(inode);
ni = ERR_PTR(err);
}
@@ -1842,10 +1867,12 @@ int ntfs_security_init(struct ntfs_sb_info *sbi)
goto out;
}
- root_sdh = resident_data_ex(attr, sizeof(struct INDEX_ROOT));
- if (root_sdh->type != ATTR_ZERO ||
+ if(!(root_sdh = resident_data_ex(attr, sizeof(struct INDEX_ROOT))) ||
+ root_sdh->type != ATTR_ZERO ||
root_sdh->rule != NTFS_COLLATION_TYPE_SECURITY_HASH ||
- offsetof(struct INDEX_ROOT, ihdr) + root_sdh->ihdr.used > attr->res.data_size) {
+ offsetof(struct INDEX_ROOT, ihdr) +
+ le32_to_cpu(root_sdh->ihdr.used) >
+ le32_to_cpu(attr->res.data_size)) {
err = -EINVAL;
goto out;
}
@@ -1861,10 +1888,12 @@ int ntfs_security_init(struct ntfs_sb_info *sbi)
goto out;
}
- root_sii = resident_data_ex(attr, sizeof(struct INDEX_ROOT));
- if (root_sii->type != ATTR_ZERO ||
+ if(!(root_sii = resident_data_ex(attr, sizeof(struct INDEX_ROOT))) ||
+ root_sii->type != ATTR_ZERO ||
root_sii->rule != NTFS_COLLATION_TYPE_UINT ||
- offsetof(struct INDEX_ROOT, ihdr) + root_sii->ihdr.used > attr->res.data_size) {
+ offsetof(struct INDEX_ROOT, ihdr) +
+ le32_to_cpu(root_sii->ihdr.used) >
+ le32_to_cpu(attr->res.data_size)) {
err = -EINVAL;
goto out;
}