We're going to give more control over rx buffer sizes to user space, and since we can't always rely on driver validation, let's sanitise it in page_pool_init() as well. Note that we only need to reject over MAX_PAGE_ORDER allocations for normal page pools, as current memory providers don't need to use the buddy allocator and must check the order on init. Suggested-by: Stanislav Fomichev Signed-off-by: Pavel Begunkov --- net/core/page_pool.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 343a6cac21e3..630e34533b16 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -303,6 +303,9 @@ static int page_pool_init(struct page_pool *pool, } static_branch_inc(&page_pool_mem_providers); + } else if (pool->p.order > MAX_PAGE_ORDER) { + err = -EINVAL; + goto free_ptr_ring; } return 0; -- 2.49.0