1 // SPDX-License-Identifier: GPL-2.0
18  * about this value. This means compile-time length checks involving
19  * this variable cannot be performed; only run-time checks.
46  * This tries to stay within the next largest power-of-2 kmalloc cache
71 	 * The slub allocator uses the first word to store the free  in lkdtm_WRITE_AFTER_FREE()
73 	 * allocation to avoid running into the freelist  in lkdtm_WRITE_AFTER_FREE()
80 	pr_info("Allocated memory %p-%p\n", base, &base[offset * 2]);  in lkdtm_WRITE_AFTER_FREE()
98 	 * the middle of the allocation to store the free pointer,  in lkdtm_READ_AFTER_FREE()
100 	 * avoid running into the freelist.  in lkdtm_READ_AFTER_FREE()
119 	pr_info("Value in memory before free: %x\n", base[offset]);  in lkdtm_READ_AFTER_FREE()
143 	 * the middle of the allocation to store the free pointer,  in lkdtm_KFENCE_READ_AFTER_FREE()
145 	 * avoid running into the freelist.  in lkdtm_KFENCE_READ_AFTER_FREE()
155 	 * Especially for non-preemption kernels, ensure the allocation-gate  in lkdtm_KFENCE_READ_AFTER_FREE()
157 	 * attempt yields, to ensure the allocation-gate timer is scheduled.  in lkdtm_KFENCE_READ_AFTER_FREE()
170 			pr_info("Value in memory before free: %x\n", base[offset]);  in lkdtm_KFENCE_READ_AFTER_FREE()
198 		pr_info("Unable to allocate free page\n");  in lkdtm_WRITE_BUDDY_AFTER_FREE()
202 	pr_info("Writing to the buddy page before free\n");  in lkdtm_WRITE_BUDDY_AFTER_FREE()
206 	pr_info("Attempting bad write to the buddy page after free\n");  in lkdtm_WRITE_BUDDY_AFTER_FREE()
221 		pr_info("Unable to allocate free page\n");  in lkdtm_READ_BUDDY_AFTER_FREE()
236 	pr_info("Value in memory before free: %x\n", base[0]);  in lkdtm_READ_BUDDY_AFTER_FREE()
290 		pr_info("Unable to allocate first free page\n");  in lkdtm_BUDDY_INIT_ON_ALLOC()
299 		pr_info("Unable to allocate second free page\n");  in lkdtm_BUDDY_INIT_ON_ALLOC()
328 	pr_info("Attempting double slab free ...\n");  in lkdtm_SLAB_FREE_DOUBLE()
345 	pr_info("Attempting cross-cache slab free ...\n");  in lkdtm_SLAB_FREE_CROSS()
353 	pr_info("Attempting non-Slab slab free ...\n");  in lkdtm_SLAB_FREE_PAGE()
371 	double_free_cache = kmem_cache_create("lkdtm-heap-double_free",  in lkdtm_heap_init()
373 	a_cache = kmem_cache_create("lkdtm-heap-a", 64, 0, 0, ctor_a);  in lkdtm_heap_init()
374 	b_cache = kmem_cache_create("lkdtm-heap-b", 64, 0, 0, ctor_b);  in lkdtm_heap_init()