diff options
Diffstat (limited to 'kernel/module.c')
| -rw-r--r-- | kernel/module.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/module.c b/kernel/module.c index a6e43a5806a1..68469b37d61a 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1472,7 +1472,8 @@ static ssize_t module_sect_show(struct module_attribute *mattr, { struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); - return sprintf(buf, "0x%pK\n", (void *)sattr->address); + return sprintf(buf, "0x%px\n", kptr_restrict < 2 ? + (void *)sattr->address : NULL); } static void free_sect_attrs(struct module_sect_attrs *sect_attrs) @@ -1603,8 +1604,7 @@ static void add_notes_attrs(struct module *mod, const struct load_info *info) if (notes == 0) return; - notes_attrs = kzalloc(sizeof(*notes_attrs) - + notes * sizeof(notes_attrs->attrs[0]), + notes_attrs = kzalloc(struct_size(notes_attrs, attrs, notes), GFP_KERNEL); if (notes_attrs == NULL) return; @@ -3516,6 +3516,11 @@ static noinline int do_init_module(struct module *mod) * walking this with preempt disabled. In all the failure paths, we * call synchronize_sched(), but we don't want to slow down the success * path, so use actual RCU here. + * Note that module_alloc() on most architectures creates W+X page + * mappings which won't be cleaned up until do_free_init() runs. Any + * code such as mark_rodata_ro() which depends on those mappings to + * be cleaned up needs to sync with the queued work - ie + * rcu_barrier_sched() */ call_rcu_sched(&freeinit->rcu, do_free_init); mutex_unlock(&module_mutex); |