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ANDROID: modules: fix suspicious rcu usage

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Use rcu_read_lock_sched() & rcu_read_unlock_sched() to mark the
beginning & end of a RCU-sched critical section instead.

Bug: 171362096
Signed-off-by: Neal Liu <neal.liu@mediatek.com>
Change-Id: Idb40e2c2356621398e06944f7cb9b8bc5ef1d92a
This commit is contained in:
Neal Liu
2020-10-22 17:11:31 +08:00
committed by Matthias Maennich
parent e17d9fc531
commit ba2f977129
1 changed files with 2 additions and 2 deletions
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4
kernel/module.c
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@@ -4348,10 +4348,10 @@ int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
static void cfi_init(struct module *mod) static void cfi_init(struct module *mod)
{ {
#ifdef CONFIG_CFI_CLANG #ifdef CONFIG_CFI_CLANG
rcu_read_lock(); rcu_read_lock_sched();
mod->cfi_check = (cfi_check_fn)find_kallsyms_symbol_value(mod, mod->cfi_check = (cfi_check_fn)find_kallsyms_symbol_value(mod,
CFI_CHECK_FN_NAME); CFI_CHECK_FN_NAME);
rcu_read_unlock(); rcu_read_unlock_sched();
cfi_module_add(mod, module_addr_min, module_addr_max); cfi_module_add(mod, module_addr_min, module_addr_max);
#endif #endif
} }