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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: Alexander 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Potapenko 2019-10-14 14:12:00 -07:00 committed by Linus Torvalds
parent 0f181f9fbe
commit 03a9349ac0
1 changed files with 27 additions and 0 deletions
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27
lib/test_meminit.c
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@ -297,6 +297,32 @@ out:
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;