[arm:clearfog 1/11] drivers/net/dsa/mv88e6xxx/mv88e6xxx_debugfs.c:736:6: warning: %d in format string (no. 1) requires 'int but the argument type is 'unsigned int

[kernel test robot]

tree:   git://git.armlinux.org.uk/~rmk/linux-arm.git clearfog
head:   8ccd5dd41a272bdbcbbffcdfee0841849fc1c8dc
commit: 0153c32fab966f63d6c45ebd4ba9520beda0d1b3 [1/11] net: dsa: mv88e6xxx: add debugfs interface
compiler: h8300-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>


cppcheck warnings: (new ones prefixed by >>)

   In file included from drivers/net/dsa/mv88e6xxx/chip.c:
>> drivers/net/dsa/mv88e6xxx/mv88e6xxx_debugfs.c:736:6: warning: %d in format string (no. 1) requires 'int *' but the argument type is 'unsigned int *'. [invalidScanfArgType_int]
    if (sscanf(cmd, "%d %d %x", &src_dev, &src_port, &pvlan) != 3)
        ^
   drivers/net/dsa/mv88e6xxx/mv88e6xxx_debugfs.c:736:6: warning: %d in format string (no. 2) requires 'int *' but the argument type is 'unsigned int *'. [invalidScanfArgType_int]
    if (sscanf(cmd, "%d %d %x", &src_dev, &src_port, &pvlan) != 3)
        ^
>> drivers/net/dsa/mv88e6xxx/mv88e6xxx_debugfs.c:162:8: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
    ret = sscanf(cmd, "%s %x %x", name, &reg, &val);
          ^

git remote add arm git://git.armlinux.org.uk/~rmk/linux-arm.git
git fetch --no-tags arm clearfog
git checkout 0153c32fab966f63d6c45ebd4ba9520beda0d1b3
vim +736 drivers/net/dsa/mv88e6xxx/mv88e6xxx_debugfs.c

   722	
   723	static ssize_t mv88e6xxx_pvt_write(struct file *file, const char __user *buf,
   724					    size_t count, loff_t *ppos)
   725	{
   726		struct seq_file *s = file->private_data;
   727		struct mv88e6xxx_chip *chip = s->private;
   728		const u16 mask = (1 << mv88e6xxx_num_ports(chip)) - 1;
   729		char cmd[32];
   730		unsigned int src_dev, src_port, pvlan;
   731		int ret;
   732	
   733		if (copy_from_user(cmd, buf, sizeof(cmd)))
   734			return -EFAULT;
   735	
 > 736		if (sscanf(cmd, "%d %d %x", &src_dev, &src_port, &pvlan) != 3)
   737			return -EINVAL;
   738	
   739		if (src_dev >= 32 || src_port >= 16 || pvlan & ~mask)
   740			return -ERANGE;
   741	
   742		mutex_lock(&chip->reg_lock);
   743		ret = _mv88e6xxx_pvt_write(chip, src_dev, src_port, pvlan);
   744		mutex_unlock(&chip->reg_lock);
   745	
   746		return ret < 0 ? ret : count;
   747	}
   748	

---
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