patch-2.4.18 linux/mm/shmem.c

• Lines: 12
• Date: Mon Feb 18 19:37:41 2002
• Orig file: linux.orig/mm/shmem.c
• Orig date: Fri Dec 21 17:42:05 2001

diff -Naur -X /home/marcelo/lib/dontdiff linux.orig/mm/shmem.c linux/mm/shmem.c
@@ -752,6 +752,11 @@
 	long		status;
 	int		err;
 
+	if ((ssize_t) count < 0)
+		return -EINVAL;
+
+	if (!access_ok(VERIFY_READ, buf, count))
+		return -EFAULT;
 
 	down(&inode->i_sem);