Re: [PATCH 14/20] target: Manual replacement of the deprecated strlcpy() with return values

[kernel test robot]

Hi Romain,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on s390/features]
[also build test WARNING on cryptodev/master crypto/master driver-core/driver-core-testing linus/master v5.11 next-20210222]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Romain-Perier/Manual-replacement-of-all-strlcpy-in-favor-of-strscpy/20210222-232701
base:   https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features
config: x86_64-randconfig-s022-20210222 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-229-g60c1f270-dirty
        # https://github.com/0day-ci/linux/commit/8b76bc6bcdb6b3d4847d4c6298b53759acc0849a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Romain-Perier/Manual-replacement-of-all-strlcpy-in-favor-of-strscpy/20210222-232701
        git checkout 8b76bc6bcdb6b3d4847d4c6298b53759acc0849a
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   drivers/target/target_core_configfs.c: In function 'target_check_inquiry_data.constprop':
>> drivers/target/target_core_configfs.c:1293:8: warning: argument 1 null where non-null expected [-Wnonnull]
    1293 |  len = strlen(buf);
         |        ^~~~~~~~~~~
   In file included from include/linux/bitmap.h:9,
                    from include/linux/cpumask.h:12,
                    from arch/x86/include/asm/cpumask.h:5,
                    from arch/x86/include/asm/msr.h:11,
                    from arch/x86/include/asm/processor.h:22,
                    from arch/x86/include/asm/timex.h:5,
                    from include/linux/timex.h:65,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from drivers/target/target_core_configfs.c:15:
   include/linux/string.h:89:24: note: in a call to function 'strlen' declared here
      89 | extern __kernel_size_t strlen(const char *);
         |                        ^~~~~~


vim +1293 drivers/target/target_core_configfs.c

c66ac9db8d4ad9 Nicholas Bellinger 2010-12-17  1287  
0322913cab79e4 Alan Adamson       2019-03-01  1288  static ssize_t target_check_inquiry_data(char *buf)
0322913cab79e4 Alan Adamson       2019-03-01  1289  {
0322913cab79e4 Alan Adamson       2019-03-01  1290  	size_t len;
0322913cab79e4 Alan Adamson       2019-03-01  1291  	int i;
0322913cab79e4 Alan Adamson       2019-03-01  1292  
0322913cab79e4 Alan Adamson       2019-03-01 @1293  	len = strlen(buf);
0322913cab79e4 Alan Adamson       2019-03-01  1294  
0322913cab79e4 Alan Adamson       2019-03-01  1295  	/*
0322913cab79e4 Alan Adamson       2019-03-01  1296  	 * SPC 4.3.1:
0322913cab79e4 Alan Adamson       2019-03-01  1297  	 * ASCII data fields shall contain only ASCII printable characters
0322913cab79e4 Alan Adamson       2019-03-01  1298  	 * (i.e., code values 20h to 7Eh) and may be terminated with one or
0322913cab79e4 Alan Adamson       2019-03-01  1299  	 * more ASCII null (00h) characters.
0322913cab79e4 Alan Adamson       2019-03-01  1300  	 */
0322913cab79e4 Alan Adamson       2019-03-01  1301  	for (i = 0; i < len; i++) {
0322913cab79e4 Alan Adamson       2019-03-01  1302  		if (buf[i] < 0x20 || buf[i] > 0x7E) {
0322913cab79e4 Alan Adamson       2019-03-01  1303  			pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
0322913cab79e4 Alan Adamson       2019-03-01  1304  			return -EINVAL;
0322913cab79e4 Alan Adamson       2019-03-01  1305  		}
0322913cab79e4 Alan Adamson       2019-03-01  1306  	}
0322913cab79e4 Alan Adamson       2019-03-01  1307  
0322913cab79e4 Alan Adamson       2019-03-01  1308  	return len;
0322913cab79e4 Alan Adamson       2019-03-01  1309  }
0322913cab79e4 Alan Adamson       2019-03-01  1310  

---
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