add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/hfs/inode.c
..
..
@@ -454,14 +454,16 @@
454
454
 		/* panic? */
455
455
 		return -EIO;
456
456
 
457
+	res = -EIO;
458
+	if (HFS_I(main_inode)->cat_key.CName.len > HFS_NAMELEN)
459
+		goto out;
457
460
 	fd.search_key->cat = HFS_I(main_inode)->cat_key;
458
461
 	if (hfs_brec_find(&fd))
459
-		/* panic? */
460
462
 		goto out;
461
463
 
462
464
 	if (S_ISDIR(main_inode->i_mode)) {
463
465
 		if (fd.entrylength < sizeof(struct hfs_cat_dir))
464
-			/* panic? */;
466
+			goto out;
465
467
 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
466
468
 			   sizeof(struct hfs_cat_dir));
467
469
 		if (rec.type != HFS_CDR_DIR ||
..
..
@@ -474,6 +476,8 @@
474
476
 		hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
475
477
 			    sizeof(struct hfs_cat_dir));
476
478
 	} else if (HFS_IS_RSRC(inode)) {
479
+		if (fd.entrylength < sizeof(struct hfs_cat_file))
480
+			goto out;
477
481
 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
478
482
 			       sizeof(struct hfs_cat_file));
479
483
 		hfs_inode_write_fork(inode, rec.file.RExtRec,
..
..
@@ -482,7 +486,7 @@
482
486
 				sizeof(struct hfs_cat_file));
483
487
 	} else {
484
488
 		if (fd.entrylength < sizeof(struct hfs_cat_file))
485
-			/* panic? */;
489
+			goto out;
486
490
 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
487
491
 			   sizeof(struct hfs_cat_file));
488
492
 		if (rec.type != HFS_CDR_FIL ||
..
..
@@ -499,9 +503,10 @@
499
503
 		hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
500
504
 			    sizeof(struct hfs_cat_file));
501
505
 	}
506
+	res = 0;
502
507
 out:
503
508
 	hfs_find_exit(&fd);
504
-	return 0;
509
+	return res;
505
510
 }
506
511
 
507
512
 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,