106 static bool overlaps(const unsigned long ptr, unsigned long n,  in overlaps()  argument
110 	unsigned long check_high = check_low + n;  in overlaps()
121 					    unsigned long n, bool to_user)  in check_kernel_text_object()  argument
127 	if (overlaps(ptr, n, textlow, texthigh))  in check_kernel_text_object()
128 		usercopy_abort("kernel text", NULL, to_user, ptr - textlow, n);  in check_kernel_text_object()
145 	if (overlaps(ptr, n, textlow_linear, texthigh_linear))  in check_kernel_text_object()
147 			       ptr - textlow_linear, n);  in check_kernel_text_object()
150 static inline void check_bogus_address(const unsigned long ptr, unsigned long n,  in check_bogus_address()  argument
154 	if (ptr + (n - 1) < ptr)  in check_bogus_address()
155 		usercopy_abort("wrapped address", NULL, to_user, 0, ptr + n);  in check_bogus_address()
159 		usercopy_abort("null address", NULL, to_user, ptr, n);  in check_bogus_address()
162 static inline void check_heap_object(const void *ptr, unsigned long n,  in check_heap_object()  argument
171 		if (n > PAGE_SIZE - offset)  in check_heap_object()
172 			usercopy_abort("kmap", NULL, to_user, offset, n);  in check_heap_object()
180 			usercopy_abort("vmalloc", "no area", to_user, 0, n);  in check_heap_object()
182 		if (n > area->va_end - addr) {  in check_heap_object()
184 			usercopy_abort("vmalloc", NULL, to_user, offset, n);  in check_heap_object()
196 		__check_heap_object(ptr, n, folio_slab(folio), to_user);  in check_heap_object()
199 		if (n > folio_size(folio) - offset)  in check_heap_object()
200 			usercopy_abort("page alloc", NULL, to_user, offset, n);  in check_heap_object()
213 void __check_object_size(const void *ptr, unsigned long n, bool to_user)  in __check_object_size()  argument
219 	if (!n)  in __check_object_size()
223 	check_bogus_address((const unsigned long)ptr, n, to_user);  in __check_object_size()
226 	switch (check_stack_object(ptr, n)) {  in __check_object_size()
247 			n);  in __check_object_size()
251 	check_heap_object(ptr, n, to_user);  in __check_object_size()
254 	check_kernel_text_object((const unsigned long)ptr, n, to_user);  in __check_object_size()