1 files changed, 11 insertions, 12 deletions

diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index e0510496596c..a5e33f29bbeb 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -42,10 +42,12 @@ void ptrace_disable(struct task_struct *child)
 extern int peek_user(struct task_struct * child, long addr, long data);
 extern int poke_user(struct task_struct * child, long addr, long data);
 
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+long arch_ptrace(struct task_struct *child, long request,
+                 unsigned long addr, unsigned long data)
 {
         int i, ret;
-        unsigned long __user *p = (void __user *)(unsigned long)data;
+        unsigned long __user *p = (void __user *)data;
+        void __user *vp = p;
 
         switch (request) {
         /* read word at location addr. */
@@ -107,24 +109,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 #endif
 #ifdef PTRACE_GETFPREGS
         case PTRACE_GETFPREGS: /* Get the child FPU state. */
-                ret = get_fpregs((struct user_i387_struct __user *) data,
-                                 child);
+                ret = get_fpregs(vp, child);
                 break;
 #endif
 #ifdef PTRACE_SETFPREGS
         case PTRACE_SETFPREGS: /* Set the child FPU state. */
-                ret = set_fpregs((struct user_i387_struct __user *) data,
-                                 child);
+                ret = set_fpregs(vp, child);
                 break;
 #endif
         case PTRACE_GET_THREAD_AREA:
-                ret = ptrace_get_thread_area(child, addr,
-                                             (struct user_desc __user *) data);
+                ret = ptrace_get_thread_area(child, addr, vp);
                 break;
 
         case PTRACE_SET_THREAD_AREA:
-                ret = ptrace_set_thread_area(child, addr,
-                                             (struct user_desc __user *) data);
+                ret = ptrace_set_thread_area(child, addr, datavp);
                 break;
 
         case PTRACE_FAULTINFO: {
@@ -134,7 +132,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                  * On i386, ptrace_faultinfo is smaller!
                  */
                 ret = copy_to_user(p, &child->thread.arch.faultinfo,
-                                   sizeof(struct ptrace_faultinfo));
+                                   sizeof(struct ptrace_faultinfo)) ?
+                        -EIO : 0;
                 break;
         }
 
@@ -158,7 +157,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 #ifdef PTRACE_ARCH_PRCTL
         case PTRACE_ARCH_PRCTL:
                 /* XXX Calls ptrace on the host - needs some SMP thinking */
-                ret = arch_prctl(child, data, (void *) addr);
+                ret = arch_prctl(child, data, (void __user *) addr);
                 break;
 #endif
         default: