Hello, Is it guaranteed that the loop starting on line 7056 will eventually take the break? If not, line 7089 will be performing an invalid dereference of ch.
julia ---------- Forwarded message ---------- Date: Thu, 8 Aug 2019 21:31:53 +0800 From: kbuild test robot <l...@intel.com> To: kbu...@01.org Cc: Julia Lawall <julia.law...@lip6.fr> Subject: drivers/net/ethernet/intel/i40e/i40e_main.c:7089:35-37: ERROR: invalid reference to the index variable of the iterator on line 7056 CC: kbuild-...@01.org CC: linux-kernel@vger.kernel.org TO: Harshitha Ramamurthy <harshitha.ramamur...@intel.com> CC: Jeff Kirsher <jeffrey.t.kirs...@intel.com> tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master head: ecb095bff5d4b8711a81968625b3b4a235d3e477 commit: 1d8d80b4e4ff641eefa5250cba324dfa5861a9f1 i40e: Add macvlan support on i40e date: 6 weeks ago :::::: branch date: 15 hours ago :::::: commit date: 6 weeks ago If you fix the issue, kindly add following tag Reported-by: kbuild test robot <l...@intel.com> Reported-by: Julia Lawall <julia.law...@lip6.fr> >> drivers/net/ethernet/intel/i40e/i40e_main.c:7089:35-37: ERROR: invalid >> reference to the index variable of the iterator on line 7056 git remote add linus https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout 1d8d80b4e4ff641eefa5250cba324dfa5861a9f1 vim +7089 drivers/net/ethernet/intel/i40e/i40e_main.c 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7037 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7038 /** 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7039 * i40e_fwd_ring_up - bring the macvlan device up 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7040 * @vsi: the VSI we want to access 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7041 * @vdev: macvlan netdevice 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7042 * @fwd: the private fwd structure 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7043 */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7044 static int i40e_fwd_ring_up(struct i40e_vsi *vsi, struct net_device *vdev, 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7045 struct i40e_fwd_adapter *fwd) 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7046 { 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7047 int ret = 0, num_tc = 1, i, aq_err; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7048 struct i40e_channel *ch, *ch_tmp; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7049 struct i40e_pf *pf = vsi->back; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7050 struct i40e_hw *hw = &pf->hw; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7051 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7052 if (list_empty(&vsi->macvlan_list)) 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7053 return -EINVAL; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7054 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7055 /* Go through the list and find an available channel */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 @7056 list_for_each_entry_safe(ch, ch_tmp, &vsi->macvlan_list, list) { 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7057 if (!i40e_is_channel_macvlan(ch)) { 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7058 ch->fwd = fwd; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7059 /* record configuration for macvlan interface in vdev */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7060 for (i = 0; i < num_tc; i++) 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7061 netdev_bind_sb_channel_queue(vsi->netdev, vdev, 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7062 i, 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7063 ch->num_queue_pairs, 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7064 ch->base_queue); 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7065 for (i = 0; i < ch->num_queue_pairs; i++) { 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7066 struct i40e_ring *tx_ring, *rx_ring; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7067 u16 pf_q; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7068 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7069 pf_q = ch->base_queue + i; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7070 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7071 /* Get to TX ring ptr */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7072 tx_ring = vsi->tx_rings[pf_q]; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7073 tx_ring->ch = ch; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7074 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7075 /* Get the RX ring ptr */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7076 rx_ring = vsi->rx_rings[pf_q]; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7077 rx_ring->ch = ch; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7078 } 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7079 break; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7080 } 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7081 } 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7082 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7083 /* Guarantee all rings are updated before we update the 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7084 * MAC address filter. 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7085 */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7086 wmb(); 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7087 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7088 /* Add a mac filter */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 @7089 ret = i40e_add_macvlan_filter(hw, ch->seid, vdev->dev_addr, &aq_err); 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7090 if (ret) { 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7091 /* if we cannot add the MAC rule then disable the offload */ 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7092 macvlan_release_l2fw_offload(vdev); 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7093 for (i = 0; i < ch->num_queue_pairs; i++) { 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7094 struct i40e_ring *rx_ring; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7095 u16 pf_q; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7096 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7097 pf_q = ch->base_queue + i; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7098 rx_ring = vsi->rx_rings[pf_q]; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7099 rx_ring->netdev = NULL; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7100 } 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7101 dev_info(&pf->pdev->dev, 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7102 "Error adding mac filter on macvlan err %s, aq_err %s\n", 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7103 i40e_stat_str(hw, ret), 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7104 i40e_aq_str(hw, aq_err)); 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7105 netdev_err(vdev, "L2fwd offload disabled to L2 filter error\n"); 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7106 } 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7107 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7108 return ret; 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7109 } 1d8d80b4e4ff64 Harshitha Ramamurthy 2019-06-19 7110 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation