[PATCH] powerpc signal __user annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 7 insertions, 11 deletions

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index c6d0595da6b5..bd837b5dbf06 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -142,11 +142,7 @@ static inline int get_old_sigaction(struct k_sigaction *new_ka,
         return 0;
 }
 
-static inline compat_uptr_t to_user_ptr(void *kp)
-{
-        return (compat_uptr_t)(u64)kp;
-}
-
+#define to_user_ptr(p)          ptr_to_compat(p)
 #define from_user_ptr(p)        compat_ptr(p)
 
 static inline int save_general_regs(struct pt_regs *regs,
@@ -213,8 +209,8 @@ static inline int get_old_sigaction(struct k_sigaction *new_ka,
         return 0;
 }
 
-#define to_user_ptr(p)          (p)
-#define from_user_ptr(p)        (p)
+#define to_user_ptr(p)          ((unsigned long)(p))
+#define from_user_ptr(p)        ((void __user *)(p))
 
 static inline int save_general_regs(struct pt_regs *regs,
                 struct mcontext __user *frame)
@@ -526,7 +522,7 @@ long compat_sys_rt_sigaction(int sig, const struct sigaction32 __user *act,
 
         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
         if (!ret && oact) {
-                ret = put_user((long)old_ka.sa.sa_handler, &oact->sa_handler);
+                ret = put_user(to_user_ptr(old_ka.sa.sa_handler), &oact->sa_handler);
                 ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
         }
@@ -675,8 +671,8 @@ long compat_sys_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo
 int compat_sys_sigaltstack(u32 __new, u32 __old, int r5,
                       int r6, int r7, int r8, struct pt_regs *regs)
 {
-        stack_32_t __user * newstack = (stack_32_t __user *)(long) __new;
-        stack_32_t __user * oldstack = (stack_32_t __user *)(long) __old;
+        stack_32_t __user * newstack = compat_ptr(__new);
+        stack_32_t __user * oldstack = compat_ptr(__old);
         stack_t uss, uoss;
         int ret;
         mm_segment_t old_fs;
@@ -708,7 +704,7 @@ int compat_sys_sigaltstack(u32 __new, u32 __old, int r5,
         set_fs(old_fs);
         /* Copy the stack information to the user output buffer */
         if (!ret && oldstack  &&
-                (put_user((long)uoss.ss_sp, &oldstack->ss_sp) ||
+                (put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
                  __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
                  __put_user(uoss.ss_size, &oldstack->ss_size)))
                 return -EFAULT;