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lib/test_meminit: add a kmem_cache_alloc_bulk() test
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Make sure allocations from kmem_cache_alloc_bulk() and
kmem_cache_free_bulk() are properly initialized.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexander Potapenko <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Laura Abbott <[email protected]>
Cc: Thibaut Sautereau <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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ramosian-glider authored and torvalds committed Oct 14, 2019
1 parent 0f181f9 commit 03a9349
Showing 1 changed file with 27 additions and 0 deletions.
27 changes: 27 additions & 0 deletions lib/test_meminit.c
Original file line number Diff line number Diff line change
Expand Up @@ -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.
Expand All @@ -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;
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