drivers/crypto/starfive/jh7110-rsa.c:66:2-17: WARNING: NULL check before some freeing functions is not needed.

From: kernel test robot
Date: Thu Nov 30 2023 - 04:58:37 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3b47bc037bd44f142ac09848e8d3ecccc726be99
commit: 445a4aaf5842073e4130b1d6dbe3785284d9615f crypto: starfive - Add RSA algo support
date: 5 months ago
config: arm64-randconfig-r061-20231130 (https://download.01.org/0day-ci/archive/20231130/202311301702.LxswfETY-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231130/202311301702.LxswfETY-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311301702.LxswfETY-lkp@xxxxxxxxx/

cocci warnings: (new ones prefixed by >>)
>> drivers/crypto/starfive/jh7110-rsa.c:66:2-17: WARNING: NULL check before some freeing functions is not needed.
drivers/crypto/starfive/jh7110-rsa.c:68:2-17: WARNING: NULL check before some freeing functions is not needed.
drivers/crypto/starfive/jh7110-rsa.c:70:2-17: WARNING: NULL check before some freeing functions is not needed.

vim +66 drivers/crypto/starfive/jh7110-rsa.c

62
63 static void starfive_rsa_free_key(struct starfive_rsa_key *key)
64 {
65 if (key->d)
> 66 kfree_sensitive(key->d);
67 if (key->e)
68 kfree_sensitive(key->e);
69 if (key->n)
70 kfree_sensitive(key->n);
71 memset(key, 0, sizeof(*key));
72 }
73

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