diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index 5cf698785faeee..4414743b638e82 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -6154,6 +6154,9 @@ static int ocfs2_get_truncate_log_info(struct ocfs2_super *osb, int status; struct inode *inode = NULL; struct buffer_head *bh = NULL; + struct ocfs2_dinode *di; + struct ocfs2_truncate_log *tl; + unsigned int tl_count; inode = ocfs2_get_system_file_inode(osb, TRUNCATE_LOG_SYSTEM_INODE, @@ -6171,6 +6174,18 @@ static int ocfs2_get_truncate_log_info(struct ocfs2_super *osb, goto bail; } + di = (struct ocfs2_dinode *)bh->b_data; + tl = &di->id2.i_dealloc; + tl_count = le16_to_cpu(tl->tl_count); + if (unlikely(tl_count > ocfs2_truncate_recs_per_inode(osb->sb) || + tl_count == 0)) { + status = -EFSCORRUPTED; + iput(inode); + brelse(bh); + mlog_errno(status); + goto bail; + } + *tl_inode = inode; *tl_bh = bh; bail: