Hi Varad,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on cryptodev/master]
[also build test WARNING on crypto/master security/next-testing linus/master v5.12-rc5 next-20210330]
[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/Varad-Gautam/Implement-RSASSA-PSS-signature-verification/20210331-043846
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
config: x86_64-randconfig-s022-20210330 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-279-g6d5d9b42-dirty
        # https://github.com/0day-ci/linux/commit/5fa5152bbf75d015ed5e85d2f0631c902bb8fbe0
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Varad-Gautam/Implement-RSASSA-PSS-signature-verification/20210331-043846
        git checkout 5fa5152bbf75d015ed5e85d2f0631c902bb8fbe0
        # 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 <redacted>


sparse warnings: (new ones prefixed by >>)

quoted

crypto/asymmetric_keys/x509_cert_parser.c:887:17: sparse: sparse: cast to restricted __be16
crypto/asymmetric_keys/x509_cert_parser.c:887:17: sparse: sparse: cast to restricted __be16
crypto/asymmetric_keys/x509_cert_parser.c:887:17: sparse: sparse: cast to restricted __be16
crypto/asymmetric_keys/x509_cert_parser.c:887:17: sparse: sparse: cast to restricted __be16

vim +887 crypto/asymmetric_keys/x509_cert_parser.c

   873	
   874	int x509_note_salt_length(void *context, size_t hdrlen,
   875				  unsigned char tag,
   876				  const void *value, size_t vlen)
   877	{
   878		struct x509_parse_context *ctx = context;
   879	
   880		if (ctx->last_oid != OID_rsassaPSS)
   881			return -EBADMSG;
   882	
   883		if (!value || !vlen || vlen > sizeof(ctx->cert->sig->salt_length))
   884			return -EINVAL;
   885	
   886		ctx->cert->sig->salt_length = (vlen == 2) ?
 > 887			be16_to_cpu(*((u16 *) value)) : *((u8 *) value);
   888	
   889		return 0;
   890	}
   891	

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0-DAY CI Kernel Test Service, Intel Corporation
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