diff --git a/arch/x86/include/asm/shstk.h b/arch/x86/include/asm/shstk.h
index d4a5c7b10cb5..ecb23a8ca47d 100644
--- a/arch/x86/include/asm/shstk.h
+++ b/arch/x86/include/asm/shstk.h
@@ -6,6 +6,7 @@
 #include <linux/types.h>
 
 struct task_struct;
+struct ksignal;
 
 #ifdef CONFIG_X86_USER_SHADOW_STACK
 struct thread_shstk {
@@ -18,6 +19,8 @@ void reset_thread_features(void);
 unsigned long shstk_alloc_thread_stack(struct task_struct *p, unsigned long clone_flags,
 				       unsigned long stack_size);
 void shstk_free(struct task_struct *p);
+int setup_signal_shadow_stack(struct ksignal *ksig);
+int restore_signal_shadow_stack(void);
 #else
 static inline long shstk_prctl(struct task_struct *task, int option,
 			       unsigned long arg2) { return -EINVAL; }
@@ -26,6 +29,8 @@ static inline unsigned long shstk_alloc_thread_stack(struct task_struct *p,
 						     unsigned long clone_flags,
 						     unsigned long stack_size) { return 0; }
 static inline void shstk_free(struct task_struct *p) {}
+static inline int setup_signal_shadow_stack(struct ksignal *ksig) { return 0; }
+static inline int restore_signal_shadow_stack(void) { return 0; }
 #endif /* CONFIG_X86_USER_SHADOW_STACK */
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/x86/kernel/shstk.c b/arch/x86/kernel/shstk.c
index e22928c63ffc..f02e8ea4f1b5 100644
--- a/arch/x86/kernel/shstk.c
+++ b/arch/x86/kernel/shstk.c
@@ -232,6 +232,101 @@ static int get_shstk_data(unsigned long *data, unsigned long __user *addr)
 	return 0;
 }
 
+static int shstk_push_sigframe(unsigned long *ssp)
+{
+	unsigned long target_ssp = *ssp;
+
+	/* Token must be aligned */
+	if (!IS_ALIGNED(target_ssp, 8))
+		return -EINVAL;
+
+	*ssp -= SS_FRAME_SIZE;
+	if (put_shstk_data((void *__user)*ssp, target_ssp))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int shstk_pop_sigframe(unsigned long *ssp)
+{
+	unsigned long token_addr;
+	int err;
+
+	err = get_shstk_data(&token_addr, (unsigned long __user *)*ssp);
+	if (unlikely(err))
+		return err;
+
+	/* Restore SSP aligned? */
+	if (unlikely(!IS_ALIGNED(token_addr, 8)))
+		return -EINVAL;
+
+	/* SSP in userspace? */
+	if (unlikely(token_addr >= TASK_SIZE_MAX))
+		return -EINVAL;
+
+	*ssp = token_addr;
+
+	return 0;
+}
+
+int setup_signal_shadow_stack(struct ksignal *ksig)
+{
+	void __user *restorer = ksig->ka.sa.sa_restorer;
+	unsigned long ssp;
+	int err;
+
+	if (!cpu_feature_enabled(X86_FEATURE_USER_SHSTK) ||
+	    !features_enabled(ARCH_SHSTK_SHSTK))
+		return 0;
+
+	if (!restorer)
+		return -EINVAL;
+
+	ssp = get_user_shstk_addr();
+	if (unlikely(!ssp))
+		return -EINVAL;
+
+	err = shstk_push_sigframe(&ssp);
+	if (unlikely(err))
+		return err;
+
+	/* Push restorer address */
+	ssp -= SS_FRAME_SIZE;
+	err = write_user_shstk_64((u64 __user *)ssp, (u64)restorer);
+	if (unlikely(err))
+		return -EFAULT;
+
+	fpregs_lock_and_load();
+	wrmsrl(MSR_IA32_PL3_SSP, ssp);
+	fpregs_unlock();
+
+	return 0;
+}
+
+int restore_signal_shadow_stack(void)
+{
+	unsigned long ssp;
+	int err;
+
+	if (!cpu_feature_enabled(X86_FEATURE_USER_SHSTK) ||
+	    !features_enabled(ARCH_SHSTK_SHSTK))
+		return 0;
+
+	ssp = get_user_shstk_addr();
+	if (unlikely(!ssp))
+		return -EINVAL;
+
+	err = shstk_pop_sigframe(&ssp);
+	if (unlikely(err))
+		return err;
+
+	fpregs_lock_and_load();
+	wrmsrl(MSR_IA32_PL3_SSP, ssp);
+	fpregs_unlock();
+
+	return 0;
+}
+
 void shstk_free(struct task_struct *tsk)
 {
 	struct thread_shstk *shstk = &tsk->thread.shstk;
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index cfeec3ee877e..65fe2094da59 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -40,6 +40,7 @@
 #include <asm/syscall.h>
 #include <asm/sigframe.h>
 #include <asm/signal.h>
+#include <asm/shstk.h>
 
 static inline int is_ia32_compat_frame(struct ksignal *ksig)
 {
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
index 0e808c72bf7e..cacf2ede6217 100644
--- a/arch/x86/kernel/signal_64.c
+++ b/arch/x86/kernel/signal_64.c
@@ -175,6 +175,9 @@ int x64_setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs)
 	frame = get_sigframe(ksig, regs, sizeof(struct rt_sigframe), &fp);
 	uc_flags = frame_uc_flags(regs);
 
+	if (setup_signal_shadow_stack(ksig))
+		return -EFAULT;
+
 	if (!user_access_begin(frame, sizeof(*frame)))
 		return -EFAULT;
 
@@ -260,6 +263,9 @@ SYSCALL_DEFINE0(rt_sigreturn)
 	if (!restore_sigcontext(regs, &frame->uc.uc_mcontext, uc_flags))
 		goto badframe;
 
+	if (restore_signal_shadow_stack())
+		goto badframe;
+
 	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;