linux-kernel - drivers/pci/hotplug/octep_hp.c:312:53: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 7

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Message-ID: <202503191406.iySrpFbN-lkp@intel.com>
Date: Wed, 19 Mar 2025 14:23:48 +0800
From: kernel test robot <lkp@...el.com>
To: Shijith Thotton <sthotton@...vell.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Bjorn Helgaas <helgaas@...nel.org>,
	Vamsi Attunuru <vattunuru@...vell.com>
Subject: drivers/pci/hotplug/octep_hp.c:312:53: warning: '%d' directive
 output may be truncated writing between 1 and 10 bytes into a region of size
 7

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   81e4f8d68c66da301bb881862735bd74c6241a19
commit: e434e54d3ffcd17eeadfcf3cf434bc1dff36daff PCI: hotplug: Add OCTEON PCI hotplug controller driver
date:   4 months ago
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20250319/202503191406.iySrpFbN-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250319/202503191406.iySrpFbN-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>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503191406.iySrpFbN-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/pci/hotplug/octep_hp.c: In function 'octep_hp_pci_probe':
>> drivers/pci/hotplug/octep_hp.c:312:53: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 7 [-Wformat-truncation=]
     snprintf(intr->name, sizeof(intr->name), "octep_hp_%d", type);
                                                        ^~
   drivers/pci/hotplug/octep_hp.c:312:43: note: directive argument in the range [0, 2147483646]
     snprintf(intr->name, sizeof(intr->name), "octep_hp_%d", type);
                                              ^~~~~~~~~~~~~
   drivers/pci/hotplug/octep_hp.c:312:2: note: 'snprintf' output between 11 and 20 bytes into a destination of size 16
     snprintf(intr->name, sizeof(intr->name), "octep_hp_%d", type);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for GET_FREE_REGION
   Depends on [n]: SPARSEMEM [=n]
   Selected by [m]:
   - RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m]


vim +312 drivers/pci/hotplug/octep_hp.c

   297	
   298	static int octep_hp_request_irq(struct octep_hp_controller *hp_ctrl,
   299					enum octep_hp_intr_type type)
   300	{
   301		struct pci_dev *pdev = hp_ctrl->pdev;
   302		struct octep_hp_intr_info *intr;
   303		int irq;
   304	
   305		irq = pci_irq_vector(pdev, OCTEP_HP_INTR_VECTOR(type));
   306		if (irq < 0)
   307			return irq;
   308	
   309		intr = &hp_ctrl->intr[type];
   310		intr->number = irq;
   311		intr->type = type;
 > 312		snprintf(intr->name, sizeof(intr->name), "octep_hp_%d", type);
   313	
   314		return devm_request_irq(&pdev->dev, irq, octep_hp_intr_handler,
   315					IRQF_SHARED, intr->name, hp_ctrl);
   316	}
   317	

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