patch-2.4.27 linux-2.4.27/drivers/char/nvram.c

• Lines: 31
• Date: 2004-08-07 16:26:04.716349325 -0700
• Orig file: linux-2.4.26/drivers/char/nvram.c
• Orig date: 2003-06-13 07:51:33.000000000 -0700

diff -urN linux-2.4.26/drivers/char/nvram.c linux-2.4.27/drivers/char/nvram.c
@@ -252,9 +252,13 @@
 nvram_read(struct file *file, char *buf, size_t count, loff_t *ppos)
 {
 	unsigned char contents[NVRAM_BYTES];
-	unsigned i = *ppos;
+	loff_t n = *ppos;
+	unsigned i = n;
 	unsigned char *tmp;
 
+	if (i != n || i >= NVRAM_BYTES)
+		return 0;
+
 	spin_lock_irq(&rtc_lock);
 
 	if (!__nvram_check_checksum())
@@ -281,10 +285,14 @@
 nvram_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
 {
 	unsigned char contents[NVRAM_BYTES];
-	unsigned i = *ppos;
+	loff_t n = *ppos;
+	unsigned i = n;
 	unsigned char *tmp;
 	int len;
 
+	if (i != n || i >= NVRAM_BYTES)
+		return 0;
+
 	len = (NVRAM_BYTES - i) < count ? (NVRAM_BYTES - i) : count;
 	if (copy_from_user(contents, buf, len))
 		return -EFAULT;