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Date: Wed, 6 Dec 2023 21:35:23 +0100 (CET)
From: Julia Lawall <julia.lawall@...ia.fr>
To: Jinjie Ruan <ruanjinjie@...wei.com>
cc: Paolo Abeni <pabeni@...hat.com>,
Jacob Keller <jacob.e.keller@...el.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
Simon Horman <horms@...nel.org>, linux-kernel@...r.kernel.org,
oe-kbuild-all@...ts.linux.dev
Subject: drivers/net/ethernet/intel/igb/igb_main.c:7895:6-11: ERROR: invalid
reference to the index variable of the iterator on line 7890 (fwd)
On line 7895, entry cannot be NULL. If the list_for_each_entry reaches
the end, entry->free could be some random location.
julia
---------- Forwarded message ----------
Date: Thu, 7 Dec 2023 02:50:54 +0800
From: kernel test robot <lkp@...el.com>
To: oe-kbuild@...ts.linux.dev
Cc: lkp@...el.com, Julia Lawall <julia.lawall@...ia.fr>
Subject: drivers/net/ethernet/intel/igb/igb_main.c:7895:6-11: ERROR: invalid
reference to the index variable of the iterator on line 7890
BCC: lkp@...el.com
CC: oe-kbuild-all@...ts.linux.dev
CC: linux-kernel@...r.kernel.org
TO: Jinjie Ruan <ruanjinjie@...wei.com>
CC: Paolo Abeni <pabeni@...hat.com>
CC: Jacob Keller <jacob.e.keller@...el.com>
CC: Tony Nguyen <anthony.l.nguyen@...el.com>
CC: Simon Horman <horms@...nel.org>
Hi Jinjie,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: bee0e7762ad2c6025b9f5245c040fcc36ef2bde8
commit: c1fec890458ad101ddbbc52cdd29f7bba6aa2b10 ethernet/intel: Use list_for_each_entry() helper
date: 10 weeks ago
:::::: branch date: 2 days ago
:::::: commit date: 10 weeks ago
config: i386-randconfig-054-20231206 (https://download.01.org/0day-ci/archive/20231207/202312070228.ehoA7Xpz-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20231207/202312070228.ehoA7Xpz-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Julia Lawall <julia.lawall@...ia.fr>
| Closes: https://lore.kernel.org/r/202312070228.ehoA7Xpz-lkp@intel.com/
cocci warnings: (new ones prefixed by >>)
>> drivers/net/ethernet/intel/igb/igb_main.c:7895:6-11: ERROR: invalid reference to the index variable of the iterator on line 7890
drivers/net/ethernet/intel/igb/igb_main.c:7895:15-20: ERROR: invalid reference to the index variable of the iterator on line 7890
vim +7895 drivers/net/ethernet/intel/igb/igb_main.c
83c21335c87622 Yury Kylulin 2017-03-07 7854
b476deab8f412b Colin Ian King 2017-04-27 7855 static int igb_set_vf_mac_filter(struct igb_adapter *adapter, const int vf,
4827cc37796a02 Yury Kylulin 2017-03-07 7856 const u32 info, const u8 *addr)
4827cc37796a02 Yury Kylulin 2017-03-07 7857 {
4827cc37796a02 Yury Kylulin 2017-03-07 7858 struct pci_dev *pdev = adapter->pdev;
4827cc37796a02 Yury Kylulin 2017-03-07 7859 struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4827cc37796a02 Yury Kylulin 2017-03-07 7860 struct vf_mac_filter *entry = NULL;
4827cc37796a02 Yury Kylulin 2017-03-07 7861 int ret = 0;
4827cc37796a02 Yury Kylulin 2017-03-07 7862
1b8b062a99dc76 Corinna Vinschen 2018-01-17 7863 if ((vf_data->flags & IGB_VF_FLAG_PF_SET_MAC) &&
1b8b062a99dc76 Corinna Vinschen 2018-01-17 7864 !vf_data->trusted) {
4827cc37796a02 Yury Kylulin 2017-03-07 7865 dev_warn(&pdev->dev,
4827cc37796a02 Yury Kylulin 2017-03-07 7866 "VF %d requested MAC filter but is administratively denied\n",
4827cc37796a02 Yury Kylulin 2017-03-07 7867 vf);
4827cc37796a02 Yury Kylulin 2017-03-07 7868 return -EINVAL;
4827cc37796a02 Yury Kylulin 2017-03-07 7869 }
4827cc37796a02 Yury Kylulin 2017-03-07 7870 if (!is_valid_ether_addr(addr)) {
4827cc37796a02 Yury Kylulin 2017-03-07 7871 dev_warn(&pdev->dev,
4827cc37796a02 Yury Kylulin 2017-03-07 7872 "VF %d attempted to set invalid MAC filter\n",
4827cc37796a02 Yury Kylulin 2017-03-07 7873 vf);
4827cc37796a02 Yury Kylulin 2017-03-07 7874 return -EINVAL;
4827cc37796a02 Yury Kylulin 2017-03-07 7875 }
4827cc37796a02 Yury Kylulin 2017-03-07 7876
584af82154f56e Karen Sornek 2021-08-31 7877 switch (info) {
584af82154f56e Karen Sornek 2021-08-31 7878 case E1000_VF_MAC_FILTER_CLR:
584af82154f56e Karen Sornek 2021-08-31 7879 /* remove all unicast MAC filters related to the current VF */
c1fec890458ad1 Jinjie Ruan 2023-09-19 7880 list_for_each_entry(entry, &adapter->vf_macs.l, l) {
584af82154f56e Karen Sornek 2021-08-31 7881 if (entry->vf == vf) {
584af82154f56e Karen Sornek 2021-08-31 7882 entry->vf = -1;
584af82154f56e Karen Sornek 2021-08-31 7883 entry->free = true;
584af82154f56e Karen Sornek 2021-08-31 7884 igb_del_mac_filter(adapter, entry->vf_mac, vf);
584af82154f56e Karen Sornek 2021-08-31 7885 }
584af82154f56e Karen Sornek 2021-08-31 7886 }
584af82154f56e Karen Sornek 2021-08-31 7887 break;
584af82154f56e Karen Sornek 2021-08-31 7888 case E1000_VF_MAC_FILTER_ADD:
4827cc37796a02 Yury Kylulin 2017-03-07 7889 /* try to find empty slot in the list */
c1fec890458ad1 Jinjie Ruan 2023-09-19 @7890 list_for_each_entry(entry, &adapter->vf_macs.l, l) {
4827cc37796a02 Yury Kylulin 2017-03-07 7891 if (entry->free)
4827cc37796a02 Yury Kylulin 2017-03-07 7892 break;
4827cc37796a02 Yury Kylulin 2017-03-07 7893 }
4827cc37796a02 Yury Kylulin 2017-03-07 7894
4827cc37796a02 Yury Kylulin 2017-03-07 @7895 if (entry && entry->free) {
4827cc37796a02 Yury Kylulin 2017-03-07 7896 entry->free = false;
4827cc37796a02 Yury Kylulin 2017-03-07 7897 entry->vf = vf;
4827cc37796a02 Yury Kylulin 2017-03-07 7898 ether_addr_copy(entry->vf_mac, addr);
4827cc37796a02 Yury Kylulin 2017-03-07 7899
4827cc37796a02 Yury Kylulin 2017-03-07 7900 ret = igb_add_mac_filter(adapter, addr, vf);
4827cc37796a02 Yury Kylulin 2017-03-07 7901 ret = min_t(int, ret, 0);
4827cc37796a02 Yury Kylulin 2017-03-07 7902 } else {
4827cc37796a02 Yury Kylulin 2017-03-07 7903 ret = -ENOSPC;
4827cc37796a02 Yury Kylulin 2017-03-07 7904 }
4827cc37796a02 Yury Kylulin 2017-03-07 7905
4827cc37796a02 Yury Kylulin 2017-03-07 7906 if (ret == -ENOSPC)
4827cc37796a02 Yury Kylulin 2017-03-07 7907 dev_warn(&pdev->dev,
4827cc37796a02 Yury Kylulin 2017-03-07 7908 "VF %d has requested MAC filter but there is no space for it\n",
4827cc37796a02 Yury Kylulin 2017-03-07 7909 vf);
4827cc37796a02 Yury Kylulin 2017-03-07 7910 break;
4827cc37796a02 Yury Kylulin 2017-03-07 7911 default:
4827cc37796a02 Yury Kylulin 2017-03-07 7912 ret = -EINVAL;
4827cc37796a02 Yury Kylulin 2017-03-07 7913 break;
4827cc37796a02 Yury Kylulin 2017-03-07 7914 }
4827cc37796a02 Yury Kylulin 2017-03-07 7915
4827cc37796a02 Yury Kylulin 2017-03-07 7916 return ret;
4827cc37796a02 Yury Kylulin 2017-03-07 7917 }
4827cc37796a02 Yury Kylulin 2017-03-07 7918
:::::: The code at line 7895 was first introduced by commit
:::::: 4827cc37796a02ece7097e01dad8e08f537ac815 igb/igbvf: Add VF MAC filter request capabilities
:::::: TO: Yury Kylulin <yury.kylulin@...el.com>
:::::: CC: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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