x86/entry: disable CFI for run_on_irqstack_cond

run_on_irqstack_cond casts callback functions to mismatching types, which trips indirect call Control-Flow Integrity (CFI) checking. Link: ClangBuiltLinux#1052 Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
samitolvanen · Jun 23, 2020 · a4f168a · a4f168a
1 parent 017a6e6
commit a4f168a
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/x86/include/asm/irq_stack.h b/arch/x86/include/asm/irq_stack.h
@@ -37,6 +37,7 @@ static __always_inline bool irq_needs_irq_stack(struct pt_regs *regs)
 	return !user_mode(regs) && !irqstack_active();
 }
 
+__nocfi
 static __always_inline void run_on_irqstack_cond(void *func, void *arg,
 						 struct pt_regs *regs)
 {