Hello! This is an experimental semi-automated report about issues detected by Coverity from a scan of next-20210608 as part of the linux-next scan project: https://scan.coverity.com/projects/linux-next-weekly-scan You're getting this email because you were associated with the identified lines of code (noted below) that were touched by commits: Wed Jun 2 19:55:18 2021 -0300 b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs") Coverity reported the following: *** CID 1505149: Integer handling issues (DIVIDE_BY_ZERO) /drivers/infiniband/hw/irdma/verbs.c: 2794 in irdma_reg_user_mr() 2788 SZ_4K | SZ_2M | SZ_1G, 2789 virt); 2790 iwmr->len = region->length; 2791 iwpbl->user_base = virt; 2792 palloc = &iwpbl->pble_alloc; 2793 iwmr->type = req.reg_type; vvv CID 1505149: Integer handling issues (DIVIDE_BY_ZERO) vvv In function call "ib_umem_num_dma_blocks", division by expression "iwmr->page_size" which may be zero has undefined behavior. 2794 iwmr->page_cnt = ib_umem_num_dma_blocks(region, iwmr->page_size); 2795 2796 switch (req.reg_type) { 2797 case IRDMA_MEMREG_TYPE_QP: 2798 use_pbles = ((req.sq_pages + req.rq_pages) > 2); 2799 err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles); If this is a false positive, please let us know so we can mark it as such, or teach the Coverity rules to be smarter. If not, please make sure fixes get into linux-next. :) For patches fixing this, please include these lines (but double-check the "Fixes" first): Reported-by: coverity-bot <keescook+coverity-bot@xxxxxxxxxxxx> Addresses-Coverity-ID: 1505149 ("Integer handling issues") Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs") Thanks for your attention! -- Coverity-bot
