3 files changed, 22 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 5908690d0868..57d8a16438a0 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -776,6 +776,7 @@ static void __init prom_send_capabilities(void)
                 /* try calling the ibm,client-architecture-support method */
                 if (call_prom_ret("call-method", 3, 2, &ret,
                                   ADDR("ibm,client-architecture-support"),
+                                  root,
                                   ADDR(ibm_architecture_vec)) == 0) {
                         /* the call exists... */
                         if (ret)
@@ -1541,6 +1542,15 @@ static int __init prom_find_machine_type(void)
                         if (strstr(p, RELOC("Power Macintosh")) ||
                             strstr(p, RELOC("MacRISC")))
                                 return PLATFORM_POWERMAC;
+#ifdef CONFIG_PPC64
+                        /* We must make sure we don't detect the IBM Cell
+                         * blades as pSeries due to some firmware issues,
+                         * so we do it here.
+                         */
+                        if (strstr(p, RELOC("IBM,CBEA")) ||
+                            strstr(p, RELOC("IBM,CPBW-1.0")))
+                                return PLATFORM_GENERIC;
+#endif /* CONFIG_PPC64 */
                         i += sl + 1;
                 }
         }
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 237faeec2ec2..d73b25e22fca 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -808,10 +808,13 @@ static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int
                 if (__get_user(cmcp, &ucp->uc_regs))
                         return -EFAULT;
                 mcp = (struct mcontext __user *)(u64)cmcp;
+                /* no need to check access_ok(mcp), since mcp < 4GB */
         }
 #else
         if (__get_user(mcp, &ucp->uc_regs))
                 return -EFAULT;
+        if (!access_ok(VERIFY_READ, mcp, sizeof(*mcp)))
+                return -EFAULT;
 #endif
         restore_sigmask(&set);
         if (restore_user_regs(regs, mcp, sig))
@@ -913,13 +916,14 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
 {
         struct sig_dbg_op op;
         int i;
+        unsigned char tmp;
         unsigned long new_msr = regs->msr;
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
         unsigned long new_dbcr0 = current->thread.dbcr0;
 #endif
 
         for (i=0; i<ndbg; i++) {
-                if (__copy_from_user(&op, dbg, sizeof(op)))
+                if (copy_from_user(&op, dbg + i, sizeof(op)))
                         return -EFAULT;
                 switch (op.dbg_type) {
                 case SIG_DBG_SINGLE_STEPPING:
@@ -964,6 +968,11 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
         current->thread.dbcr0 = new_dbcr0;
 #endif
 
+        if (!access_ok(VERIFY_READ, ctx, sizeof(*ctx))
+            || __get_user(tmp, (u8 __user *) ctx)
+            || __get_user(tmp, (u8 __user *) (ctx + 1) - 1))
+                return -EFAULT;
+
         /*
          * If we get a fault copying the context into the kernel's
          * image of the user's registers, we can't just return -EFAULT
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index 66a5fbe31989..6e75d7ab6d4d 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -184,6 +184,8 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
         err |= __get_user(v_regs, &sc->v_regs);
         if (err)
                 return err;
+        if (v_regs && !access_ok(VERIFY_READ, v_regs, 34 * sizeof(vector128)))
+                return -EFAULT;
         /* Copy 33 vec registers (vr0..31 and vscr) from the stack */
         if (v_regs != 0 && (msr & MSR_VEC) != 0)
                 err |= __copy_from_user(current->thread.vr, v_regs,