[openeuler:OLK-5.10 2564/2564] drivers/crypto/hisilicon/qm.c:2755:9: warning: 'strncpy' specified bound depends on the length of the source argument

[openeuler:OLK-5.10 2564/2564] drivers/crypto/hisilicon/qm.c:2755:9: warning: 'strncpy' specified bound depends on the length of the source argument

[kernel test robot]

Hi Weili,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   9cf5f60a8d57b2498fb9f9223825d6933b2d2fd5
commit: a1666f44c2250f7413e73e2f4c02cb2c01f9e3b0 [2564/2564] crypto: hisilicon/qm - support no-sva feature
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20241206/202412061809.pAIeGbw0-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241206/202412061809.pAIeGbw0-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412061809.pAIeGbw0-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/crypto/hisilicon/qm.c: In function 'qm_alloc_uacce':
>> drivers/crypto/hisilicon/qm.c:2755:9: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation]
    2755 |         strncpy(interface.name, pdev->driver->name, name_len);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/crypto/hisilicon/qm.c:2748:20: note: length computed here
    2748 |         name_len = strlen(pdev->driver->name);
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/strncpy +2755 drivers/crypto/hisilicon/qm.c

  2737	
  2738	static int qm_alloc_uacce(struct hisi_qm *qm)
  2739	{
  2740		struct pci_dev *pdev = qm->pdev;
  2741		struct uacce_interface interface;
  2742		struct uacce_device *uacce;
  2743		int name_len;
  2744	
  2745		if (!qm->use_uacce)
  2746			return 0;
  2747	
  2748		name_len = strlen(pdev->driver->name);
  2749		if (name_len >= UACCE_MAX_NAME_SIZE) {
  2750			pci_err(pdev, "The driver name(%d) is longer than %d!\n",
  2751				name_len, UACCE_MAX_NAME_SIZE);
  2752			return -EINVAL;
  2753		}
  2754	
> 2755		strncpy(interface.name, pdev->driver->name, name_len);
  2756		interface.name[name_len] = '\0';
  2757	
  2758		interface.flags = qm->use_iommu ? UACCE_DEV_IOMMU : UACCE_DEV_NOIOMMU;
  2759		if (qm->mode == UACCE_MODE_SVA) {
  2760			if (!qm->use_iommu) {
  2761				pci_err(pdev, "iommu not support sva!\n");
  2762				return -EINVAL;
  2763			}
  2764	
  2765			interface.flags |= UACCE_DEV_SVA;
  2766		}
  2767	
  2768		interface.ops = &uacce_qm_ops;
  2769		uacce = uacce_alloc(&pdev->dev, &interface);
  2770		if (IS_ERR(uacce)) {
  2771			pci_err(pdev, "fail to alloc uacce device\n!");
  2772			return PTR_ERR(uacce);
  2773		}
  2774		qm->uacce = uacce;
  2775	
  2776		qm_uacce_base_init(qm);
  2777		qm->uacce = uacce;
  2778		INIT_LIST_HEAD(&qm->isolate_data.qm_hw_errs);
  2779		mutex_init(&qm->isolate_data.isolate_lock);
  2780	
  2781		return 0;
  2782	}
  2783	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki