1 files changed, 13 insertions, 5 deletions

diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index 6fb5bcdd8933..19a7a5669b5b 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -306,7 +306,8 @@ setup_sigcontext(struct sigcontext __user *sc, struct _fpstate __user *fpstate,
  * Determine which stack to use..
  */
 static inline void __user *
-get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
+get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
+             struct _fpstate **fpstate)
 {
         unsigned long sp;
 
@@ -332,6 +333,11 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
                         sp = (unsigned long) ka->sa.sa_restorer;
         }
 
+        if (used_math()) {
+                sp = sp - sig_xstate_size;
+                *fpstate = (struct _fpstate *) sp;
+        }
+
         sp -= frame_size;
         /*
          * Align the stack pointer according to the i386 ABI,
@@ -350,8 +356,9 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
         void __user *restorer;
         int err = 0;
         int usig;
+        struct _fpstate __user *fpstate = NULL;
 
-        frame = get_sigframe(ka, regs, sizeof(*frame));
+        frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
                 goto give_sigsegv;
@@ -366,7 +373,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
         if (err)
                 goto give_sigsegv;
 
-        err = setup_sigcontext(&frame->sc, &frame->fpstate, regs, set->sig[0]);
+        err = setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]);
         if (err)
                 goto give_sigsegv;
 
@@ -427,8 +434,9 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         void __user *restorer;
         int err = 0;
         int usig;
+        struct _fpstate __user *fpstate = NULL;
 
-        frame = get_sigframe(ka, regs, sizeof(*frame));
+        frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
                 goto give_sigsegv;
@@ -453,7 +461,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __put_user(sas_ss_flags(regs->sp),
                           &frame->uc.uc_stack.ss_flags);
         err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
-        err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
+        err |= setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
                                 regs, set->sig[0]);
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
         if (err)