From 993c7bb78b56c7263bb563569b4619bbca9b782e Mon Sep 17 00:00:00 2001
From: Neal Liu <neal.liu@mediatek.com>
Date: Fri, 22 May 2020 17:44:35 +0800
Subject: [PATCH] ANDROID: modules: fix lockprove warning

Need to disable preemption before using rcu_dereference_sched().

Bug: 157383682
Change-Id: I5f7c0a222bac35c5fa58cdd9f4cf71cb422a01cd
Signed-off-by: Neal Liu <neal.liu@mediatek.com>
---
 kernel/module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index acea6dee9181..f5b1422d3d69 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -4171,8 +4171,10 @@ int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 static void cfi_init(struct module *mod)
 {
 #ifdef CONFIG_CFI_CLANG
+	preempt_disable();
 	mod->cfi_check =
 		(cfi_check_fn)mod_find_symname(mod, CFI_CHECK_FN_NAME);
+	preempt_enable();
 	cfi_module_add(mod, module_addr_min, module_addr_max);
 #endif
 }