On Wed, Jan 20, 2021 at 08:06:08PM +0200, Mike Rapoport wrote:
quoted hunk ↗ jump to hunk
+static int secretmem_pool_increase(struct secretmem_ctx *ctx, gfp_t gfp)
{
+ unsigned long nr_pages = (1 << PMD_PAGE_ORDER);
+ struct gen_pool *pool = ctx->pool;
+ unsigned long addr;
+ struct page *page;
+ int err;
+
+ page = cma_alloc(secretmem_cma, nr_pages, PMD_SIZE, gfp & __GFP_NOWARN);
+ if (!page)
+ return -ENOMEM;
Does cma_alloc() zero the pages it allocates? If not, where do we avoid
leaking kernel memory to userspace?
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