Commit 38a118fd authored Apr 12, 2023 by Josh Poimboeuf Committed by Greg Kroah-Hartman May 30, 2023

sched: Fix KCSAN noinstr violation



[ Upstream commit e0b081d17a9f4e5c0cbb0e5fbeb1abe3de0f7e4e ]

With KCSAN enabled, end_of_stack() can get out-of-lined.  Force it
inline.

Fixes the following warnings:

  vmlinux.o: warning: objtool: check_stackleak_irqoff+0x2b: call to end_of_stack() leaves .noinstr.text section

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/cc1b4d73d3a428a00d206242a68fdf99a934ca7b.1681320026.git.jpoimboe@kernel.org


Signed-off-by: Sasha Levin <sashal@kernel.org>

parent cbe3063a

include/linux/sched/task_stack.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -23,7 +23,7 @@ static __always_inline void task_stack_page(const struct task_struct task)

		#define setup_thread_stack(new,old) do { } while(0)

		static inline unsigned long end_of_stack(const struct task_struct task)
		static __always_inline unsigned long end_of_stack(const struct task_struct task)
		{
		#ifdef CONFIG_STACK_GROWSUP
		return (unsigned long *)((unsigned long)task->stack + THREAD_SIZE) - 1;