[xlnx:xlnx_rebase_v5.4 1005/1700] crypto/af_alg.c:267:54: sparse: sparse: incorrect type in argument 2 (different address spaces)

[kernel test robot]

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.4
head:   49bdb4e70d2001f3a5bf0bf5e990cca4a85210f4
commit: 7132d44df68f906bc3d12d6b1437d208f91c88e5 [1005/1700] crypto: Adds user space interface for ALG_SET_KEY_TYPE
config: i386-randconfig-s002-20210302 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-241-geaceeafa-dirty
        # https://github.com/Xilinx/linux-xlnx/commit/7132d44df68f906bc3d12d6b1437d208f91c88e5
        git remote add xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xlnx xlnx_rebase_v5.4
        git checkout 7132d44df68f906bc3d12d6b1437d208f91c88e5
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

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


"sparse warnings: (new ones prefixed by >>)"
>> crypto/af_alg.c:267:54: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected unsigned char const [usertype] *keytype @@     got char [noderef] <asn:1> *optval @@
   crypto/af_alg.c:267:54: sparse:     expected unsigned char const [usertype] *keytype
   crypto/af_alg.c:267:54: sparse:     got char [noderef] <asn:1> *optval

vim +267 crypto/af_alg.c

   227	
   228	static int alg_setsockopt(struct socket *sock, int level, int optname,
   229				  char __user *optval, unsigned int optlen)
   230	{
   231		struct sock *sk = sock->sk;
   232		struct alg_sock *ask = alg_sk(sk);
   233		const struct af_alg_type *type;
   234		int err = -EBUSY;
   235	
   236		lock_sock(sk);
   237		if (ask->refcnt)
   238			goto unlock;
   239	
   240		type = ask->type;
   241	
   242		err = -ENOPROTOOPT;
   243		if (level != SOL_ALG || !type)
   244			goto unlock;
   245	
   246		switch (optname) {
   247		case ALG_SET_KEY:
   248			if (sock->state == SS_CONNECTED)
   249				goto unlock;
   250			if (!type->setkey)
   251				goto unlock;
   252	
   253			err = alg_setkey(sk, optval, optlen);
   254			break;
   255		case ALG_SET_AEAD_AUTHSIZE:
   256			if (sock->state == SS_CONNECTED)
   257				goto unlock;
   258			if (!type->setauthsize)
   259				goto unlock;
   260			err = type->setauthsize(ask->private, optlen);
   261			break;
   262		case ALG_SET_KEY_TYPE:
   263			if (sock->state == SS_CONNECTED)
   264				goto unlock;
   265			if (!type->setkeytype)
   266				goto unlock;
 > 267			err = type->setkeytype(ask->private, optval, optlen);
   268		}
   269	
   270	unlock:
   271		release_sock(sk);
   272	
   273		return err;
   274	}
   275	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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