sparc: missing checks of __get_user()/__put_user() return values

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

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index 948700fb903..bb1513e45f1 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -215,8 +215,9 @@ void do_sigreturn32(struct pt_regs *regs)
             (((unsigned long) sf) & 3))
                 goto segv;
 
-        get_user(pc, &sf->info.si_regs.pc);
-        __get_user(npc, &sf->info.si_regs.npc);
+        if (get_user(pc, &sf->info.si_regs.pc) ||
+            __get_user(npc, &sf->info.si_regs.npc))
+                goto segv;
 
         if ((pc | npc) & 3)
                 goto segv;
@@ -305,8 +306,9 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
             (((unsigned long) sf) & 3))
                 goto segv;
 
-        get_user(pc, &sf->regs.pc);
-        __get_user(npc, &sf->regs.npc);
+        if (get_user(pc, &sf->regs.pc) || 
+            __get_user(npc, &sf->regs.npc))
+                goto segv;
 
         if ((pc | npc) & 3)
                 goto segv;