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dm crypt: account large pages in cc->n_allocated_pages
commit 9793c26 upstream. The commit 5054e77 ("dm crypt: allocate compound pages if possible") changed dm-crypt to use compound pages to improve performance. Unfortunately, there was an oversight: the allocation of compound pages was not accounted at all. Normal pages are accounted in a percpu counter cc->n_allocated_pages and dm-crypt is limited to allocate at most 2% of memory. Because compound pages were not accounted at all, dm-crypt could allocate memory over the 2% limit. Fix this by adding the accounting of compound pages, so that memory consumption of dm-crypt is properly limited. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Fixes: 5054e77 ("dm crypt: allocate compound pages if possible") Cc: stable@vger.kernel.org # v6.5+ Signed-off-by: Mike Snitzer <snitzer@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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