Module Name: src
Committed By: dsl
Date: Wed Oct 14 19:25:39 UTC 2009
Modified Files:
src/sys/kern: tty_pty.c
Log Message:
Error out of ptcread() if the uio length supplied is zero before the code
has a chance to panic in ureadc().
To generate a diff of this commit:
cvs rdiff -u -r1.118 -r1.119 src/sys/kern/tty_pty.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/kern/tty_pty.c
diff -u src/sys/kern/tty_pty.c:1.118 src/sys/kern/tty_pty.c:1.119
--- src/sys/kern/tty_pty.c:1.118 Sun Oct 11 08:08:32 2009
+++ src/sys/kern/tty_pty.c Wed Oct 14 19:25:39 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: tty_pty.c,v 1.118 2009/10/11 08:08:32 dsl Exp $ */
+/* $NetBSD: tty_pty.c,v 1.119 2009/10/14 19:25:39 dsl Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
@@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tty_pty.c,v 1.118 2009/10/11 08:08:32 dsl Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tty_pty.c,v 1.119 2009/10/14 19:25:39 dsl Exp $");
#include "opt_ptm.h"
@@ -586,6 +586,9 @@
int error = 0, cc;
int c;
+ if (uio->uio_resid <= 0)
+ return EINVAL;
+
/*
* We want to block until the slave
* is open, and there's something to read;
