[PATCH] uml: more __user annotations

From: Al Viro <viro@zeniv.linux.org.uk>

uml __user annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 22 insertions, 17 deletions

diff --git a/arch/um/sys-i386/syscalls.c b/arch/um/sys-i386/syscalls.c
index 749dd1bfe60f..710d5fb807e1 100644
--- a/arch/um/sys-i386/syscalls.c
+++ b/arch/um/sys-i386/syscalls.c
@@ -99,11 +99,12 @@ long sys_ipc (uint call, int first, int second,
 
         switch (call) {
         case SEMOP:
-                return sys_semtimedop(first, (struct sembuf *) ptr, second,
-                                      NULL);
+                return sys_semtimedop(first, (struct sembuf __user *) ptr,
+                                      second, NULL);
         case SEMTIMEDOP:
-                return sys_semtimedop(first, (struct sembuf *) ptr, second,
-                                      (const struct timespec *) fifth);
+                return sys_semtimedop(first, (struct sembuf __user *) ptr,
+                                      second,
+                                      (const struct timespec __user *) fifth);
         case SEMGET:
                 return sys_semget (first, second, third);
         case SEMCTL: {
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index a4c46a8af008..9edf114faf79 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -21,7 +21,7 @@
 #include "skas.h"
 
 static int copy_sc_from_user_skas(struct pt_regs *regs,
-                                 struct sigcontext *from)
+                                 struct sigcontext __user *from)
 {
        int err = 0;
 
@@ -54,7 +54,8 @@ static int copy_sc_from_user_skas(struct pt_regs *regs,
        return(err);
 }
 
-int copy_sc_to_user_skas(struct sigcontext *to, struct _fpstate *to_fp,
+int copy_sc_to_user_skas(struct sigcontext __user *to,
+                         struct _fpstate __user *to_fp,
                          struct pt_regs *regs, unsigned long mask,
                          unsigned long sp)
 {
@@ -106,10 +107,11 @@ int copy_sc_to_user_skas(struct sigcontext *to, struct _fpstate *to_fp,
 #endif
 
 #ifdef CONFIG_MODE_TT
-int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext *from,
+int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext __user *from,
                          int fpsize)
 {
-        struct _fpstate *to_fp, *from_fp;
+        struct _fpstate *to_fp;
+        struct _fpstate __user *from_fp;
         unsigned long sigs;
         int err;
 
@@ -124,13 +126,14 @@ int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext *from,
         return(err);
 }
 
-int copy_sc_to_user_tt(struct sigcontext *to, struct _fpstate *fp,
+int copy_sc_to_user_tt(struct sigcontext __user *to, struct _fpstate __user *fp,
                        struct sigcontext *from, int fpsize, unsigned long sp)
 {
-        struct _fpstate *to_fp, *from_fp;
+        struct _fpstate __user *to_fp;
+        struct _fpstate *from_fp;
         int err;
 
-        to_fp = (fp ? fp : (struct _fpstate *) (to + 1));
+        to_fp = (fp ? fp : (struct _fpstate __user *) (to + 1));
         from_fp = from->fpstate;
         err = copy_to_user(to, from, sizeof(*to));
         /* The SP in the sigcontext is the updated one for the signal
@@ -158,7 +161,8 @@ static int copy_sc_from_user(struct pt_regs *to, void __user *from)
        return(ret);
 }
 
-static int copy_sc_to_user(struct sigcontext *to, struct _fpstate *fp,
+static int copy_sc_to_user(struct sigcontext __user *to,
+                           struct _fpstate __user *fp,
                            struct pt_regs *from, unsigned long mask,
                            unsigned long sp)
 {
@@ -169,7 +173,7 @@ static int copy_sc_to_user(struct sigcontext *to, struct _fpstate *fp,
 
 struct rt_sigframe
 {
-       char *pretcode;
+       char __user *pretcode;
        struct ucontext uc;
        struct siginfo info;
 };
@@ -188,7 +192,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
 
         frame = (struct rt_sigframe __user *)
                 round_down(stack_top - sizeof(struct rt_sigframe), 16) - 8;
-        frame = (struct rt_sigframe *) ((unsigned long) frame - 128);
+        frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128);
 
         if (!access_ok(VERIFY_WRITE, fp, sizeof(struct _fpstate)))
                 goto out;
diff --git a/include/asm-um/uaccess.h b/include/asm-um/uaccess.h
index bea5a015f667..16c734af9193 100644
--- a/include/asm-um/uaccess.h
+++ b/include/asm-um/uaccess.h
@@ -41,11 +41,11 @@
 
 #define __get_user(x, ptr) \
 ({ \
-        const __typeof__(ptr) __private_ptr = ptr;      \
+        const __typeof__(*(ptr)) __user *__private_ptr = (ptr); \
         __typeof__(x) __private_val;                    \
         int __private_ret = -EFAULT;                    \
         (x) = (__typeof__(*(__private_ptr)))0;                          \
-        if (__copy_from_user((void *) &__private_val, (__private_ptr),  \
+        if (__copy_from_user((__force void *)&__private_val, (__private_ptr),\
                              sizeof(*(__private_ptr))) == 0) {          \
                 (x) = (__typeof__(*(__private_ptr))) __private_val;     \
                 __private_ret = 0;                                      \
@@ -62,7 +62,7 @@
 
 #define __put_user(x, ptr) \
 ({ \
-        __typeof__(ptr) __private_ptr = ptr; \
+        __typeof__(*(ptr)) __user *__private_ptr = ptr; \
         __typeof__(*(__private_ptr)) __private_val; \
         int __private_ret = -EFAULT; \
         __private_val = (__typeof__(*(__private_ptr))) (x); \