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Commit 2689307b authored by Alexander Potapenko's avatar Alexander Potapenko
Browse files

UPSTREAM: lib/test_meminit: add a kmem_cache_alloc_bulk() test 

Upstream commit 03a9349ac0e0 ("lib/test_meminit: add a kmem_cache_alloc_bulk()
test").

Make sure allocations from kmem_cache_alloc_bulk() and
kmem_cache_free_bulk() are properly initialized.

Link: http://lkml.kernel.org/r/20191007091605.30530-2-glider@google.com


Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Thibaut Sautereau <thibaut@sautereau.fr>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>

Bug: 138435492
Test: Boot an ARM64 mobile device with and without init_on_alloc=1
Change-Id: I59a742796d1dba97fdbd17b1ffec4830ee91a390
Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
parent 6a6bb415

lib/test_meminit.c

+27 −0
Original line number Diff line number Diff line
@@ -297,6 +297,32 @@ static int __init do_kmem_cache_rcu_persistent(int size, int *total_failures) 
	return 1;

}



static int __init do_kmem_cache_size_bulk(int size, int *total_failures)

{

	struct kmem_cache *c;

	int i, iter, maxiter = 1024;

	int num, bytes;

	bool fail = false;

	void *objects[10];



	c = kmem_cache_create("test_cache", size, size, 0, NULL);

	for (iter = 0; (iter < maxiter) && !fail; iter++) {

		num = kmem_cache_alloc_bulk(c, GFP_KERNEL, ARRAY_SIZE(objects),

					    objects);

		for (i = 0; i < num; i++) {

			bytes = count_nonzero_bytes(objects[i], size);

			if (bytes)

				fail = true;

			fill_with_garbage(objects[i], size);

		}



		if (num)

			kmem_cache_free_bulk(c, num, objects);

	}

	*total_failures += fail;

	return 1;

}



/*

 * Test kmem_cache allocation by creating caches of different sizes, with and

 * without constructors, with and without SLAB_TYPESAFE_BY_RCU.
@@ -318,6 +344,7 @@ static int __init test_kmemcache(int *total_failures) 
			num_tests += do_kmem_cache_size(size, ctor, rcu, zero,

							&failures);

		}

		num_tests += do_kmem_cache_size_bulk(size, &failures);

	}

	REPORT_FAILURES_IN_FN();

	*total_failures += failures;