Re: [PATCH v2] Jitter RNG - Permanent and Intermittent health errors

Re: [PATCH v2] Jitter RNG - Permanent and Intermittent health errors

[kernel test robot]

Hi Stephan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on herbert-cryptodev-2.6/master]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Stephan-M-ller/Jitter-RNG-Permanent-and-Intermittent-health-errors/20230324-203251
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
patch link:    https://lore.kernel.org/r/2671913.mvXUDI8C0e%40positron.chronox.de
patch subject: [PATCH v2] Jitter RNG - Permanent and Intermittent health errors
config: hexagon-randconfig-r045-20230322 (https://download.01.org/0day-ci/archive/20230324/202303242344.goIWq8zw-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/ce362096eea814a823f7bf4aef00f8680aab9056
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Stephan-M-ller/Jitter-RNG-Permanent-and-Intermittent-health-errors/20230324-203251
        git checkout ce362096eea814a823f7bf4aef00f8680aab9056
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303242344.goIWq8zw-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> crypto/jitterentropy-kcapi.c:165:1: warning: unused label 'out' [-Wunused-label]
   out:
   ^~~~
   1 warning generated.


vim +/out +165 crypto/jitterentropy-kcapi.c

dfc9fa91938bd0 Stephan Mueller 2015-06-23  131  
dfc9fa91938bd0 Stephan Mueller 2015-06-23  132  static int jent_kcapi_random(struct crypto_rng *tfm,
dfc9fa91938bd0 Stephan Mueller 2015-06-23  133  			     const u8 *src, unsigned int slen,
dfc9fa91938bd0 Stephan Mueller 2015-06-23  134  			     u8 *rdata, unsigned int dlen)
dfc9fa91938bd0 Stephan Mueller 2015-06-23  135  {
dfc9fa91938bd0 Stephan Mueller 2015-06-23  136  	struct jitterentropy *rng = crypto_rng_ctx(tfm);
dfc9fa91938bd0 Stephan Mueller 2015-06-23  137  	int ret = 0;
dfc9fa91938bd0 Stephan Mueller 2015-06-23  138  
dfc9fa91938bd0 Stephan Mueller 2015-06-23  139  	spin_lock(&rng->jent_lock);
764428fe99e82c Stephan Müller  2020-04-17  140  
dfc9fa91938bd0 Stephan Mueller 2015-06-23  141  	ret = jent_read_entropy(rng->entropy_collector, rdata, dlen);
764428fe99e82c Stephan Müller  2020-04-17  142  
ce362096eea814 Stephan Müller  2023-03-24  143  	if (ret == -3) {
ce362096eea814 Stephan Müller  2023-03-24  144  		/* Handle permanent health test error */
ce362096eea814 Stephan Müller  2023-03-24  145  		/*
ce362096eea814 Stephan Müller  2023-03-24  146  		 * If the kernel was booted with fips=2, it implies that
ce362096eea814 Stephan Müller  2023-03-24  147  		 * the entire kernel acts as a FIPS 140 module. In this case
ce362096eea814 Stephan Müller  2023-03-24  148  		 * an SP800-90B permanent health test error is treated as
ce362096eea814 Stephan Müller  2023-03-24  149  		 * a FIPS module error.
ce362096eea814 Stephan Müller  2023-03-24  150  		 */
ce362096eea814 Stephan Müller  2023-03-24  151  		if (fips_enabled)
ce362096eea814 Stephan Müller  2023-03-24  152  			panic("Jitter RNG permanent health test failure\n");
764428fe99e82c Stephan Müller  2020-04-17  153  
ce362096eea814 Stephan Müller  2023-03-24  154  		pr_err("Jitter RNG permanent health test failure\n");
ce362096eea814 Stephan Müller  2023-03-24  155  		ret = -EFAULT;
ce362096eea814 Stephan Müller  2023-03-24  156  	} else if (ret == -2) {
ce362096eea814 Stephan Müller  2023-03-24  157  		/* Handle intermittent health test error */
ce362096eea814 Stephan Müller  2023-03-24  158  		pr_warn_ratelimited("Reset Jitter RNG due to intermittent health test failure\n");
764428fe99e82c Stephan Müller  2020-04-17  159  		ret = -EAGAIN;
ce362096eea814 Stephan Müller  2023-03-24  160  	} else if (ret == -1) {
ce362096eea814 Stephan Müller  2023-03-24  161  		/* Handle other errors */
764428fe99e82c Stephan Müller  2020-04-17  162  		ret = -EINVAL;
764428fe99e82c Stephan Müller  2020-04-17  163  	}
764428fe99e82c Stephan Müller  2020-04-17  164  
764428fe99e82c Stephan Müller  2020-04-17 @165  out:
dfc9fa91938bd0 Stephan Mueller 2015-06-23  166  	spin_unlock(&rng->jent_lock);
dfc9fa91938bd0 Stephan Mueller 2015-06-23  167  
dfc9fa91938bd0 Stephan Mueller 2015-06-23  168  	return ret;
dfc9fa91938bd0 Stephan Mueller 2015-06-23  169  }
dfc9fa91938bd0 Stephan Mueller 2015-06-23  170  

-- 
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