[Blackfin] arch: add missing __user marking to ss_sp member of signalstack and a few userspace system functions

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/kernel/process.c

@@ -202,7 +202,7 @@ copy_thread(int nr, unsigned long clone_flags,
  * sys_execve() executes a new program.
  */
 
-asmlinkage int sys_execve(char *name, char **argv, char **envp)
+asmlinkage int sys_execve(char __user *name, char __user * __user *argv, char __user * __user *envp)
 {
 	int error;
 	char *filename;
@@ -245,23 +245,25 @@ unsigned long get_wchan(struct task_struct *p)
 
 void finish_atomic_sections (struct pt_regs *regs)
 {
+	int __user *up0 = (int __user *)&regs->p0;
+
 	if (regs->pc < ATOMIC_SEQS_START || regs->pc >= ATOMIC_SEQS_END)
 		return;
 
 	switch (regs->pc) {
 	case ATOMIC_XCHG32 + 2:
-		put_user(regs->r1, (int *)regs->p0);
+		put_user(regs->r1, up0);
 		regs->pc += 2;
 		break;
 
 	case ATOMIC_CAS32 + 2:
 	case ATOMIC_CAS32 + 4:
 		if (regs->r0 == regs->r1)
-			put_user(regs->r2, (int *)regs->p0);
+			put_user(regs->r2, up0);
 		regs->pc = ATOMIC_CAS32 + 8;
 		break;
 	case ATOMIC_CAS32 + 6:
-		put_user(regs->r2, (int *)regs->p0);
+		put_user(regs->r2, up0);
 		regs->pc += 2;
 		break;
 
@@ -269,7 +271,7 @@ void finish_atomic_sections (struct pt_regs *regs)
 		regs->r0 = regs->r1 + regs->r0;
 		/* fall through */
 	case ATOMIC_ADD32 + 4:
-		put_user(regs->r0, (int *)regs->p0);
+		put_user(regs->r0, up0);
 		regs->pc = ATOMIC_ADD32 + 6;
 		break;
 
@@ -277,7 +279,7 @@ void finish_atomic_sections (struct pt_regs *regs)
 		regs->r0 = regs->r1 - regs->r0;
 		/* fall through */
 	case ATOMIC_SUB32 + 4:
-		put_user(regs->r0, (int *)regs->p0);
+		put_user(regs->r0, up0);
 		regs->pc = ATOMIC_SUB32 + 6;
 		break;
 
@@ -285,7 +287,7 @@ void finish_atomic_sections (struct pt_regs *regs)
 		regs->r0 = regs->r1 | regs->r0;
 		/* fall through */
 	case ATOMIC_IOR32 + 4:
-		put_user(regs->r0, (int *)regs->p0);
+		put_user(regs->r0, up0);
 		regs->pc = ATOMIC_IOR32 + 6;
 		break;
 
@@ -293,7 +295,7 @@ void finish_atomic_sections (struct pt_regs *regs)
 		regs->r0 = regs->r1 & regs->r0;
 		/* fall through */
 	case ATOMIC_AND32 + 4:
-		put_user(regs->r0, (int *)regs->p0);
+		put_user(regs->r0, up0);
 		regs->pc = ATOMIC_AND32 + 6;
 		break;
 
@@ -301,7 +303,7 @@ void finish_atomic_sections (struct pt_regs *regs)
 		regs->r0 = regs->r1 ^ regs->r0;
 		/* fall through */
 	case ATOMIC_XOR32 + 4:
-		put_user(regs->r0, (int *)regs->p0);
+		put_user(regs->r0, up0);
 		regs->pc = ATOMIC_XOR32 + 6;
 		break;
 	}

arch/blackfin/kernel/ptrace.c

@@ -193,6 +193,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
 	int ret;
 	int add = 0;
+	unsigned long __user *datap = (unsigned long __user *)data;
 
 	switch (request) {
 		/* when I and D space are separate, these will need to be fixed. */
@@ -229,7 +230,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
 			if (copied != sizeof(tmp))
 				break;
-			ret = put_user(tmp, (unsigned long *)data);
+			ret = put_user(tmp, datap);
 			break;
 		}
 
@@ -263,7 +264,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			} else {
 				tmp = get_reg(child, addr);
 			}
-			ret = put_user(tmp, (unsigned long *)data);
+			ret = put_user(tmp, datap);
 			break;
 		}
 
@@ -389,7 +390,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		{
 
 			/* Get all gp regs from the child. */
-			ret = ptrace_getregs(child, (void __user *)data);
+			ret = ptrace_getregs(child, datap);
 			break;
 		}
 

arch/blackfin/kernel/signal.c

@@ -55,13 +55,13 @@ struct rt_sigframe {
 	struct ucontext uc;
 };
 
-asmlinkage int sys_sigaltstack(const stack_t * uss, stack_t * uoss)
+asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
 {
 	return do_sigaltstack(uss, uoss, rdusp());
 }
 
 static inline int
-rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *pr0)
+rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *pr0)
 {
 	unsigned long usp = 0;
 	int err = 0;

arch/blackfin/kernel/sys_bfin.c

@@ -49,7 +49,7 @@
  * sys_pipe() is the normal C calling standard for creating
  * a pipe. It's not the way unix traditionally does this, though.
  */
-asmlinkage int sys_pipe(unsigned long *fildes)
+asmlinkage int sys_pipe(unsigned long __user *fildes)
 {
 	int fd[2];
 	int error;

arch/blackfin/kernel/traps.c

@@ -506,7 +506,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 
 	info.si_signo = sig;
 	info.si_errno = 0;
-	info.si_addr = (void *)fp->pc;
+	info.si_addr = (void __user *)fp->pc;
 	force_sig_info(sig, &info, current);
 
 	trace_buffer_restore(j);

include/asm-blackfin/signal.h

@@ -143,7 +143,7 @@ struct sigaction {
 #endif				/* __KERNEL__ */
 
 typedef struct sigaltstack {
-	void *ss_sp;
+	void __user *ss_sp;
 	int ss_flags;
 	size_t ss_size;
 } stack_t;