mm/kfence/report.c

105 static void kfence_print_stack(struct seq_file *seq, const struct kfence_metadata *meta,
108 	const struct kfence_track *track = show_alloc ? &meta->alloc_track : &meta->free_track;
129 void kfence_print_object(struct seq_file *seq, const struct kfence_metadata *meta)
131 	const int size = abs(meta->size);
132 	const unsigned long start = meta->addr;
133 	const struct kmem_cache *const cache = meta->cache;
135 	lockdep_assert_held(&meta->lock);
137 	if (meta->state == KFENCE_OBJECT_UNUSED) {
138 		seq_con_printf(seq, "kfence-#%td unused\n", meta - kfence_metadata);
143 		       meta - kfence_metadata, (void *)start, (void *)(start + size - 1),
146 	kfence_print_stack(seq, meta, true);
148 	if (meta->state == KFENCE_OBJECT_FREED) {
150 		kfence_print_stack(seq, meta, false);
159 			      const struct kfence_metadata *meta)
165 	end = (const u8 *)(address < meta->addr ? min(show_until_addr, meta->addr)
186 			 const struct kfence_metadata *meta, enum kfence_error_type type)
189 	const ptrdiff_t object_index = meta ? meta - kfence_metadata : -1;
200 	/* Require non-NULL meta, except if KFENCE_ERROR_INVALID. */
201 	if (WARN_ON(type != KFENCE_ERROR_INVALID && !meta))
204 	if (meta)
205 		lockdep_assert_held(&meta->lock);
221 		const bool left_of_object = address < meta->addr;
227 		       left_of_object ? meta->addr - address : address - meta->addr,
240 		print_diff_canary(address, 16, meta);
259 	if (meta) {
261 		kfence_print_object(NULL, meta);
295 	struct kfence_metadata *meta = addr_to_metadata((unsigned long)object);
298 	if (!meta)
308 	if (WARN_ON(meta->state == KFENCE_OBJECT_UNUSED))
311 	raw_spin_lock_irqsave(&meta->lock, flags);
314 	kpp->kp_slab_cache = meta->cache;
315 	kpp->kp_objp = (void *)meta->addr;
316 	kfence_to_kp_stack(&meta->alloc_track, kpp->kp_stack);
317 	if (meta->state == KFENCE_OBJECT_FREED)
318 		kfence_to_kp_stack(&meta->free_track, kpp->kp_free_stack);
322 	raw_spin_unlock_irqrestore(&meta->lock, flags);