Merge tag 'x86_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/…

…linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Check whether shadow stack is active before using the ptrace regset
   getter

 - Remove a wrong BUG_ON in the early static call code which breaks Xen
   PVH when booting as dom0

* tag 'x86_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Ensure shadow stack is active before "getting" registers
  x86/static-call: Remove early_boot_irqs_disabled check to fix Xen PVH dom0

arch/x86/kernel/fpu/regset.c

@@ -190,7 +190,8 @@ int ssp_get(struct task_struct *target, const struct user_regset *regset,
 	struct fpu *fpu = &target->thread.fpu;
 	struct cet_user_state *cetregs;
 
-	if (!cpu_feature_enabled(X86_FEATURE_USER_SHSTK))
+	if (!cpu_feature_enabled(X86_FEATURE_USER_SHSTK) ||
+	    !ssp_active(target, regset))
 		return -ENODEV;
 
 	sync_fpstate(fpu);

arch/x86/kernel/static_call.c

@@ -175,7 +175,6 @@ EXPORT_SYMBOL_GPL(arch_static_call_transform);
 noinstr void __static_call_update_early(void *tramp, void *func)
 {
 	BUG_ON(system_state != SYSTEM_BOOTING);
-	BUG_ON(!early_boot_irqs_disabled);
 	BUG_ON(static_call_initialized);
 	__text_gen_insn(tramp, JMP32_INSN_OPCODE, tramp, func, JMP32_INSN_SIZE);
 	sync_core();