diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 639122738ca9939046d26fdaea5f358d83445931..fce9efa02665281be629859e06aa4eb412a17da3 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include "core.h" #include "patch.h" @@ -1049,16 +1050,21 @@ static int klp_init_object_loaded(struct klp_patch *patch, struct klp_func *func; int ret; + mutex_lock(&text_mutex); + module_disable_ro(patch->mod); ret = klp_write_object_relocations(patch->mod, obj); if (ret) { module_enable_ro(patch->mod, true); + mutex_unlock(&text_mutex); return ret; } arch_klp_init_object_loaded(patch, obj); module_enable_ro(patch->mod, true); + mutex_unlock(&text_mutex); + klp_for_each_func(obj, func) { ret = klp_find_object_symbol(obj->name, func->old_name, func->old_sympos, diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 118ecce143866bf8034093ce15baaef38124a709..0a0bb839ac5e98cf0c1abd1c4c496f2eaa722bd3 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -35,6 +35,7 @@ #include #include #include +#include #include @@ -2627,10 +2628,12 @@ static void ftrace_run_update_code(int command) { int ret; + mutex_lock(&text_mutex); + ret = ftrace_arch_code_modify_prepare(); FTRACE_WARN_ON(ret); if (ret) - return; + goto out_unlock; /* * By default we use stop_machine() to modify the code. @@ -2642,6 +2645,9 @@ static void ftrace_run_update_code(int command) ret = ftrace_arch_code_modify_post_process(); FTRACE_WARN_ON(ret); + +out_unlock: + mutex_unlock(&text_mutex); } static void ftrace_run_modify_code(struct ftrace_ops *ops, int command, @@ -5765,6 +5771,7 @@ void ftrace_module_enable(struct module *mod) struct ftrace_page *pg; mutex_lock(&ftrace_lock); + mutex_lock(&text_mutex); if (ftrace_disabled) goto out_unlock; @@ -5826,6 +5833,7 @@ void ftrace_module_enable(struct module *mod) ftrace_arch_code_modify_post_process(); out_unlock: + mutex_unlock(&text_mutex); mutex_unlock(&ftrace_lock); process_cached_mods(mod->name);