[PATCH] profile: fix uaccess handling

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/kernel/profile.c b/kernel/profile.c
index f940b46..15b012d 100644 (file)
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -442,7 +442,8 @@ read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
        read = 0;
 
        while (p < sizeof(unsigned int) && count > 0) {
-               put_user(*((char *)(&sample_step)+p),buf);
+               if (put_user(*((char *)(&sample_step)+p),buf))
+                       return -EFAULT;
                buf++; p++; count--; read++;
        }
        pnt = (char *)prof_buffer + p - sizeof(atomic_t);