diff -Naur -X /home/greg/linux/dontdiff linux-2.2.18/include/linux/sysctl.h linux-2.2.18-greg/include/linux/sysctl.h
--- linux-2.2.18/include/linux/sysctl.h	Sun Dec 10 16:49:44 2000
+++ linux-2.2.18-greg/include/linux/sysctl.h	Fri Jan 26 10:28:40 2001
@@ -30,7 +30,7 @@

 struct __sysctl_args {
 	int *name;
-	int nlen;
+	unsigned nlen;
 	void *oldval;
 	size_t *oldlenp;
 	void *newval;
@@ -465,7 +465,7 @@

 typedef struct ctl_table ctl_table;

-typedef int ctl_handler (ctl_table *table, int *name, int nlen,
+typedef int ctl_handler (ctl_table *table, int *name, unsigned nlen,
 			 void *oldval, size_t *oldlenp,
 			 void *newval, size_t newlen,
 			 void **context);
@@ -484,12 +484,12 @@
 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
 				 void *, size_t *);

-extern int do_sysctl (int *name, int nlen,
+extern int do_sysctl (int *name, unsigned nlen,
 		      void *oldval, size_t *oldlenp,
 		      void *newval, size_t newlen);

 extern int do_sysctl_strategy (ctl_table *table,
-			       int *name, int nlen,
+			       int *name, unsigned nlen,
 			       void *oldval, size_t *oldlenp,
 			       void *newval, size_t newlen, void ** context);

diff -Naur -X /home/greg/linux/dontdiff linux-2.2.18/kernel/sysctl.c linux-2.2.18-greg/kernel/sysctl.c
--- linux-2.2.18/kernel/sysctl.c	Sun Dec 10 16:49:44 2000
+++ linux-2.2.18-greg/kernel/sysctl.c	Fri Jan 26 10:31:38 2001
@@ -77,7 +77,7 @@

 extern int pgt_cache_water[];

-static int parse_table(int *, int, void *, size_t *, void *, size_t,
+static int parse_table(int *, unsigned, void *, size_t *, void *, size_t,
 		       ctl_table *, void **);
 static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
 		  void *buffer, size_t *lenp);
@@ -320,7 +320,7 @@
 }


-int do_sysctl (int *name, int nlen,
+int do_sysctl (int *name, unsigned nlen,
 	       void *oldval, size_t *oldlenp,
 	       void *newval, size_t newlen)
 {
@@ -330,10 +330,12 @@
 	
 	if (nlen == 0 || nlen >= CTL_MAXNAME)
 		return -ENOTDIR;
-	
-	if (oldval)
-	{
-		int old_len;
+
+	if ((ssize_t)newlen < 0)
+		return -EINVAL;	
+
+	if (oldval) {
+		size_t old_len;
 		if (!oldlenp)
 			return -EFAULT;
 		if(get_user(old_len, oldlenp))
@@ -387,7 +389,7 @@
 	return test_perm(table->mode, op);
 }

-static int parse_table(int *name, int nlen,
+static int parse_table(int *name, unsigned nlen,
 		       void *oldval, size_t *oldlenp,
 		       void *newval, size_t newlen,
 		       ctl_table *table, void **context)
@@ -430,11 +432,12 @@

 /* Perform the actual read/write of a sysctl table entry. */
 int do_sysctl_strategy (ctl_table *table,
-			int *name, int nlen,
+			int *name, unsigned nlen,
 			void *oldval, size_t *oldlenp,
 			void *newval, size_t newlen, void **context)
 {
-	int op = 0, rc, len;
+	int op = 0, rc;
+	size_t len;

 	if (oldval)
 		op |= 004;
@@ -458,6 +461,8 @@
 		if (oldval && oldlenp) {
 			get_user(len, oldlenp);
 			if (len) {
+				if (len < 0)
+					return -EINVAL;
 				if (len > table->maxlen)
 					len = table->maxlen;
 				if(copy_to_user(oldval, table->data, len))
@@ -642,7 +647,7 @@
 int proc_dostring(ctl_table *table, int write, struct file *filp,
 		  void *buffer, size_t *lenp)
 {
-	int len;
+	size_t len;
 	char *p, c;
 	
 	if (!table->data || !table->maxlen || !*lenp ||
@@ -710,7 +715,8 @@
 static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
 		  void *buffer, size_t *lenp, int conv, int op)
 {
-	int *i, vleft, first=1, len, left, neg, val;
+	int *i, neg, val;
+	size_t len, left, vleft, first=1;
 	#define TMPBUFLEN 20
 	char buf[TMPBUFLEN], *p;
 	
@@ -832,7 +838,8 @@
 int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
 		  void *buffer, size_t *lenp)
 {
-	int *i, *min, *max, vleft, first=1, len, left, neg, val;
+	int *i, *min, *max, neg, val;
+	size_t len, left, vleft, first=1;
 	#define TMPBUFLEN 20
 	char buf[TMPBUFLEN], *p;
 	
@@ -974,11 +981,12 @@
  */

 /* The generic string strategy routine: */
-int sysctl_string(ctl_table *table, int *name, int nlen,
+int sysctl_string(ctl_table *table, int *name, unsigned nlen,
 		  void *oldval, size_t *oldlenp,
 		  void *newval, size_t newlen, void **context)
 {
-	int l, len;
+	unsigned l;
+	size_t len;
 	
 	if (!table->data || !table->maxlen)
 		return -ENOTDIR;
@@ -1017,11 +1025,12 @@
  * are between the minimum and maximum values given in the arrays
  * table->extra1 and table->extra2, respectively.
  */
-int sysctl_intvec(ctl_table *table, int *name, int nlen,
+int sysctl_intvec(ctl_table *table, int *name, unsigned nlen,
 		void *oldval, size_t *oldlenp,
 		void *newval, size_t newlen, void **context)
 {
-	int i, length, *vec, *min, *max;
+	int *vec, *min, *max;
+	size_t i, length;

 	if (newval && newlen) {
 		if (newlen % sizeof(int) != 0)
@@ -1051,7 +1060,7 @@
 }

 /* Strategy function to convert jiffies to seconds */
-int sysctl_jiffies(ctl_table *table, int *name, int nlen,
+int sysctl_jiffies(ctl_table *table, int *name, unsigned nlen,
 		void *oldval, size_t *oldlenp,
 		void *newval, size_t newlen, void **context)
 {
@@ -1159,21 +1168,21 @@
 	return -ENOSYS;
 }

-int sysctl_string(ctl_table *table, int *name, int nlen,
+int sysctl_string(ctl_table *table, int *name, unsigned nlen,
 		  void *oldval, size_t *oldlenp,
 		  void *newval, size_t newlen, void **context)
 {
 	return -ENOSYS;
 }

-int sysctl_intvec(ctl_table *table, int *name, int nlen,
+int sysctl_intvec(ctl_table *table, int *name, unsigned nlen,
 		void *oldval, size_t *oldlenp,
 		void *newval, size_t newlen, void **context)
 {
 	return -ENOSYS;
 }

-int sysctl_jiffies(ctl_table *table, int *name, int nlen,
+int sysctl_jiffies(ctl_table *table, int *name, unsigned nlen,
 		void *oldval, size_t *oldlenp,
 		void *newval, size_t newlen, void **context)
 {
diff -Naur -X /home/greg/linux/dontdiff linux-2.2.18/net/ipv4/route.c linux-2.2.18-greg/net/ipv4/route.c
--- linux-2.2.18/net/ipv4/route.c	Sun Dec 10 16:49:44 2000
+++ linux-2.2.18-greg/net/ipv4/route.c	Fri Jan 26 10:28:40 2001
@@ -1927,7 +1927,7 @@
 		return -EINVAL;
 }

-static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table, int *name, int nlen,
+static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table, int *name, unsigned nlen,
 			 void *oldval, size_t *oldlenp,
 			 void *newval, size_t newlen,
 			 void **context)
diff -Naur -X /home/greg/linux/dontdiff linux-2.2.18/net/ipv4/sysctl_net_ipv4.c linux-2.2.18-greg/net/ipv4/sysctl_net_ipv4.c
--- linux-2.2.18/net/ipv4/sysctl_net_ipv4.c	Sun Dec 10 16:49:44 2000
+++ linux-2.2.18-greg/net/ipv4/sysctl_net_ipv4.c	Fri Jan 26 10:28:40 2001
@@ -87,7 +87,7 @@
 	return ret;
 }

-static int ipv4_sysctl_forward_strategy(ctl_table *table, int *name, int nlen,
+static int ipv4_sysctl_forward_strategy(ctl_table *table, int *name, unsigned nlen,
 			 void *oldval, size_t *oldlenp,
 			 void *newval, size_t newlen,
 			 void **context)