05 Dec, 2019
1 commit
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kmem_cache_alloc_bulk/kmem_cache_free_bulk are used to make multiple
allocations of the same size to avoid the overhead of multiple
kmalloc/kfree calls. Extend the kmem_cache tests to make some calls to
these APIs.Link: http://lkml.kernel.org/r/20191107191447.23058-1-labbott@redhat.com
Signed-off-by: Laura Abbott
Reviewed-by: Kees Cook
Tested-by: Alexander Potapenko
Cc: Laura Abbott
Cc: Christoph Lameter
Cc: Nick Desaulniers
Cc: Kostya Serebryany
Cc: Dmitry Vyukov
Cc: Sandeep Patil
Cc: Jann Horn
Cc: Marco Elver
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Oct, 2019
1 commit
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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/20191007091605.30530-2-glider@google.com
Signed-off-by: Alexander Potapenko
Cc: Kees Cook
Cc: Christoph Lameter
Cc: Laura Abbott
Cc: Thibaut Sautereau
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Aug, 2019
1 commit
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kmalloc() shouldn't sleep while in RCU critical section, therefore use
GFP_ATOMIC instead of GFP_KERNEL.The bug was spotted by the 0day kernel testing robot.
Link: http://lkml.kernel.org/r/20190725121703.210874-1-glider@google.com
Fixes: 7e659650cbda ("lib: introduce test_meminit module")
Signed-off-by: Alexander Potapenko
Reviewed-by: Andrew Morton
Reported-by: kernel test robot
Cc: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Jul, 2019
3 commits
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Fix the following issues in test_meminit.c:
- |size| in fill_with_garbage_skip() should be signed so that it
doesn't overflow if it's not aligned on sizeof(*p);
- fill_with_garbage_skip() should actually skip |skip| bytes;
- do_kmem_cache_size() should deallocate memory in the RCU case.Link: http://lkml.kernel.org/r/20190626133135.217355-1-glider@google.com
Fixes: 7e659650cbda ("lib: introduce test_meminit module")
Fixes: 94e8988d91c7 ("lib/test_meminit.c: fix -Wmaybe-uninitialized false positive")
Signed-off-by: Alexander Potapenko
Cc: Arnd Bergmann
Cc: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The conditional logic is too complicated for the compiler to fully
comprehend:lib/test_meminit.c: In function 'test_meminit_init':
lib/test_meminit.c:236:5: error: 'buf_copy' may be used uninitialized in this function [-Werror=maybe-uninitialized]
kfree(buf_copy);
^~~~~~~~~~~~~~~
lib/test_meminit.c:201:14: note: 'buf_copy' was declared hereSimplify it by splitting out the non-rcu section.
Link: http://lkml.kernel.org/r/20190617131210.2190280-1-arnd@arndb.de
Fixes: af734ee6ec85 ("lib: introduce test_meminit module")
Signed-off-by: Arnd Bergmann
Acked-by: Alexander Potapenko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add tests for heap and pagealloc initialization. These can be used to
check init_on_alloc and init_on_free implementations as well as other
approaches to initialization.Expected test output in the case the kernel provides heap initialization
(e.g. when running with either init_on_alloc=1 or init_on_free=1):test_meminit: all 10 tests in test_pages passed
test_meminit: all 40 tests in test_kvmalloc passed
test_meminit: all 60 tests in test_kmemcache passed
test_meminit: all 10 tests in test_rcu_persistent passed
test_meminit: all 120 tests passed!Link: http://lkml.kernel.org/r/20190529123812.43089-4-glider@google.com
Signed-off-by: Alexander Potapenko
Acked-by: Kees Cook
Cc: Christoph Lameter
Cc: Nick Desaulniers
Cc: Kostya Serebryany
Cc: Dmitry Vyukov
Cc: Sandeep Patil
Cc: Laura Abbott
Cc: Jann Horn
Cc: Marco Elver
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
