[PATCH] lkdtm: reduce stack size

[Frank Seidel <fseidel@suse.de>]

From: Frank Seidel <frank@f-seidel.de>

Reduce stack memory footprint of lkdtm
(recursive_loop). From 1024 bytes on i386 down
to <10.

Signed-off-by: Frank Seidel <frank@f-seidel.de>
---
 drivers/misc/lkdtm.c |   16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -225,14 +225,24 @@ static int lkdtm_parse_commandline(void)
 
 static int recursive_loop(int a)
 {
-	char buf[1024];
+	char *buf;
+	int ret;
+
+	buf = kmalloc(1024, GFP_KERNEL);
+	if (!buf) {
+		printk(KERN_ERR "lkdtm : couldn't allocate buffer\n");
+		return -ENOMEM;
+	}
 
 	memset(buf,0xFF,1024);
 	recur_count--;
 	if (!recur_count)
-		return 0;
+		ret = 0;
 	else
-        	return recursive_loop(a);
+		ret = recursive_loop(a);
+
+	kfree(buf);
+	return ret;
 }
 
 void lkdtm_handler(void)