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From: Roman Divacky <rdivacky@FreeBSD.org>
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Subject: PERFORCE change 122087 for review
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http://perforce.freebsd.org/chv.cgi?CH=122087

Change 122087 by rdivacky@rdivacky_witten on 2007/06/21 11:13:03

	Dont copy whole path from userland when we need only the first char. Also
	we dont use len so dont care filling it.
	
	Pointed out by: netchild

Affected files ...

.. //depot/projects/soc2007/rdivacky/linux_at/sys/kern/vfs_syscalls.c#23 edit

Differences ...

==== //depot/projects/soc2007/rdivacky/linux_at/sys/kern/vfs_syscalls.c#23 (text+ko) ====

@@ -988,13 +988,13 @@
 /* Check whether a path is an absolute path. */
 static int kern_absolute_path(char *path, enum uio_seg pathseg)
 {
-	int error, len;
-	char buf[PATH_MAX];
+	int error;
+	char buf[1];
 
 	if (pathseg == UIO_SYSSPACE) {
 		return (path[0] == '/');		
 	} else {
-		error = copyinstr(path, buf, PATH_MAX, &len);
+		error = copyinstr(path, buf, 1, NULL);
 		if (error)
 			return 1;	/* we want to fail */
 		return (buf[0] == '/');