diff options
Diffstat (limited to 'fs/squashfs/dir.c')
| -rw-r--r-- | fs/squashfs/dir.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/squashfs/dir.c b/fs/squashfs/dir.c index f7f527bf8c1..d8c2d747be2 100644 --- a/fs/squashfs/dir.c +++ b/fs/squashfs/dir.c @@ -54,6 +54,7 @@ static int get_dir_index_using_offset(struct super_block *sb, { struct squashfs_sb_info *msblk = sb->s_fs_info; int err, i, index, length = 0; + unsigned int size; struct squashfs_dir_index dir_index; TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %lld\n", @@ -81,8 +82,14 @@ static int get_dir_index_using_offset(struct super_block *sb, */ break; + size = le32_to_cpu(dir_index.size) + 1; + + /* size should never be larger than SQUASHFS_NAME_LEN */ + if (size > SQUASHFS_NAME_LEN) + break; + err = squashfs_read_metadata(sb, NULL, &index_start, - &index_offset, le32_to_cpu(dir_index.size) + 1); + &index_offset, size); if (err < 0) break; @@ -105,9 +112,8 @@ static int squashfs_readdir(struct file *file, struct dir_context *ctx) struct inode *inode = file_inode(file); struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; u64 block = squashfs_i(inode)->start + msblk->directory_table; - int offset = squashfs_i(inode)->offset, length, dir_count, size, - type, err; - unsigned int inode_number; + int offset = squashfs_i(inode)->offset, length, err; + unsigned int inode_number, dir_count, size, type; struct squashfs_dir_header dirh; struct squashfs_dir_entry *dire; @@ -200,6 +206,9 @@ static int squashfs_readdir(struct file *file, struct dir_context *ctx) ((short) le16_to_cpu(dire->inode_number)); type = le16_to_cpu(dire->type); + if (type > SQUASHFS_MAX_DIR_TYPE) + goto failed_read; + if (!dir_emit(ctx, dire->name, size, inode_number, squashfs_filetype_table[type])) |