add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/hfs/inode.c
..
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@@ -17,6 +17,7 @@
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 #include <linux/cred.h>
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 #include <linux/uio.h>
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 #include <linux/xattr.h>
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+#include <linux/blkdev.h>
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 #include "hfs_fs.h"
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 #include "btree.h"
..
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@@ -351,7 +352,7 @@
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 		inode->i_mode &= ~hsb->s_file_umask;
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 		inode->i_mode |= S_IFREG;
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 		inode->i_ctime = inode->i_atime = inode->i_mtime =
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-				timespec_to_timespec64(hfs_m_to_utime(rec->file.MdDat));
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+				hfs_m_to_utime(rec->file.MdDat);
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 		inode->i_op = &hfs_file_inode_operations;
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 		inode->i_fop = &hfs_file_operations;
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 		inode->i_mapping->a_ops = &hfs_aops;
..
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@@ -362,7 +363,7 @@
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 		HFS_I(inode)->fs_blocks = 0;
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 		inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
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 		inode->i_ctime = inode->i_atime = inode->i_mtime =
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-				timespec_to_timespec64(hfs_m_to_utime(rec->dir.MdDat));
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+				hfs_m_to_utime(rec->dir.MdDat);
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 		inode->i_op = &hfs_dir_inode_operations;
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 		inode->i_fop = &hfs_dir_operations;
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 		break;
..
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@@ -453,14 +454,16 @@
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 		/* panic? */
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 		return -EIO;
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+	res = -EIO;
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+	if (HFS_I(main_inode)->cat_key.CName.len > HFS_NAMELEN)
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+		goto out;
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 	fd.search_key->cat = HFS_I(main_inode)->cat_key;
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 	if (hfs_brec_find(&fd))
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-		/* panic? */
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 		goto out;
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 	if (S_ISDIR(main_inode->i_mode)) {
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 		if (fd.entrylength < sizeof(struct hfs_cat_dir))
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-			/* panic? */;
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+			goto out;
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 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
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 			   sizeof(struct hfs_cat_dir));
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 		if (rec.type != HFS_CDR_DIR ||
..
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@@ -473,6 +476,8 @@
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 		hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
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 			    sizeof(struct hfs_cat_dir));
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 	} else if (HFS_IS_RSRC(inode)) {
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+		if (fd.entrylength < sizeof(struct hfs_cat_file))
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+			goto out;
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 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
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 			       sizeof(struct hfs_cat_file));
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 		hfs_inode_write_fork(inode, rec.file.RExtRec,
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@@ -481,7 +486,7 @@
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 				sizeof(struct hfs_cat_file));
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 	} else {
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 		if (fd.entrylength < sizeof(struct hfs_cat_file))
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-			/* panic? */;
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+			goto out;
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 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
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 			   sizeof(struct hfs_cat_file));
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 		if (rec.type != HFS_CDR_FIL ||
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@@ -498,9 +503,10 @@
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 		hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
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 			    sizeof(struct hfs_cat_file));
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 	}
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+	res = 0;
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 out:
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 	hfs_find_exit(&fd);
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-	return 0;
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+	return res;
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 }
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 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,