diff options
Diffstat (limited to 'kernel/livepatch')
| -rw-r--r-- | kernel/livepatch/core.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index c5e631cd151b..c03c04637ec6 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -883,7 +883,7 @@ int klp_register_patch(struct klp_patch *patch) } EXPORT_SYMBOL_GPL(klp_register_patch); -static void klp_module_notify_coming(struct klp_patch *patch, +static int klp_module_notify_coming(struct klp_patch *patch, struct klp_object *obj) { struct module *pmod = patch->mod; @@ -891,22 +891,23 @@ static void klp_module_notify_coming(struct klp_patch *patch, int ret; ret = klp_init_object_loaded(patch, obj); - if (ret) - goto err; + if (ret) { + pr_warn("failed to initialize patch '%s' for module '%s' (%d)\n", + pmod->name, mod->name, ret); + return ret; + } if (patch->state == KLP_DISABLED) - return; + return 0; pr_notice("applying patch '%s' to loading module '%s'\n", pmod->name, mod->name); ret = klp_enable_object(obj); - if (!ret) - return; - -err: - pr_warn("failed to apply patch '%s' to module '%s' (%d)\n", - pmod->name, mod->name, ret); + if (ret) + pr_warn("failed to apply patch '%s' to module '%s' (%d)\n", + pmod->name, mod->name, ret); + return ret; } static void klp_module_notify_going(struct klp_patch *patch, @@ -930,6 +931,7 @@ disabled: static int klp_module_notify(struct notifier_block *nb, unsigned long action, void *data) { + int ret; struct module *mod = data; struct klp_patch *patch; struct klp_object *obj; @@ -955,7 +957,12 @@ static int klp_module_notify(struct notifier_block *nb, unsigned long action, if (action == MODULE_STATE_COMING) { obj->mod = mod; - klp_module_notify_coming(patch, obj); + ret = klp_module_notify_coming(patch, obj); + if (ret) { + obj->mod = NULL; + pr_warn("patch '%s' is in an inconsistent state!\n", + patch->mod->name); + } } else /* MODULE_STATE_GOING */ klp_module_notify_going(patch, obj); |