Hi Hannes, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.14 next-20210910] [cannot apply to cryptodev/master crypto/master linux-nvme/for-next] [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/Hannes-Reinecke/nvme-In-band-aut... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bf9f243f23e6623f310ba03fbb14e10ec3a61290 config: powerpc-randconfig-s032-20210911 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/8b89de04a6eef68be62dcebf344e946c3... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hannes-Reinecke/nvme-In-band-authentication-support/20210910-144627 git checkout 8b89de04a6eef68be62dcebf344e946c3e6843de # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/nvme/host/ drivers/nvme/target/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/nvme/host/auth.c:509:26: sparse: expected restricted __le32 [assigned] [usertype] tl drivers/nvme/host/auth.c:509:26: sparse: got unsigned long [usertype] tl drivers/nvme/host/auth.c:537:29: sparse: expected restricted __le32 [assigned] [usertype] al drivers/nvme/host/auth.c:537:29: sparse: got unsigned long [usertype] al drivers/nvme/host/auth.c:735:46: sparse: expected unsigned long [usertype] size drivers/nvme/host/auth.c:735:46: sparse: got restricted __le16 [usertype] dhvlen drivers/nvme/host/auth.c:738:36: sparse: expected int ctrl_key_len drivers/nvme/host/auth.c:738:36: sparse: got restricted __le16 [usertype] dhvlen drivers/nvme/host/auth.c:740:28: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected unsigned long [usertype] size @@ got restricted __le16 [usertype] dhvlen @@ drivers/nvme/host/auth.c:740:28: sparse: expected unsigned long [usertype] size drivers/nvme/host/auth.c:740:28: sparse: got restricted __le16 [usertype] dhvlen drivers/nvme/host/auth.c:773:22: sparse: expected restricted __le16 [usertype] dhvlen drivers/nvme/host/auth.c:773:22: sparse: got int host_key_len vim +235 drivers/nvme/host/auth.c 0f7847d23405a2 Hannes Reinecke 2021-09-10 224 0f7847d23405a2 Hannes Reinecke 2021-09-10 225 u8 *nvme_auth_transform_key(u8 *key, size_t key_len, u8 key_hash, char *nqn) 0f7847d23405a2 Hannes Reinecke 2021-09-10 226 { 0f7847d23405a2 Hannes Reinecke 2021-09-10 227 const char *hmac_name = nvme_auth_hmac_name(key_hash); 0f7847d23405a2 Hannes Reinecke 2021-09-10 228 struct crypto_shash *key_tfm; 0f7847d23405a2 Hannes Reinecke 2021-09-10 229 struct shash_desc *shash; 0f7847d23405a2 Hannes Reinecke 2021-09-10 230 u8 *transformed_key; 0f7847d23405a2 Hannes Reinecke 2021-09-10 231 int ret; 0f7847d23405a2 Hannes Reinecke 2021-09-10 232 0f7847d23405a2 Hannes Reinecke 2021-09-10 233 /* No key transformation required */ 0f7847d23405a2 Hannes Reinecke 2021-09-10 234 if (key_hash == 0) 0f7847d23405a2 Hannes Reinecke 2021-09-10 @235 return 0; 0f7847d23405a2 Hannes Reinecke 2021-09-10 236 0f7847d23405a2 Hannes Reinecke 2021-09-10 237 hmac_name = nvme_auth_hmac_name(key_hash); 0f7847d23405a2 Hannes Reinecke 2021-09-10 238 if (!hmac_name) { 0f7847d23405a2 Hannes Reinecke 2021-09-10 239 pr_warn("Invalid key hash id %d\n", key_hash); 0f7847d23405a2 Hannes Reinecke 2021-09-10 240 return ERR_PTR(-EKEYREJECTED); 0f7847d23405a2 Hannes Reinecke 2021-09-10 241 } 0f7847d23405a2 Hannes Reinecke 2021-09-10 242 key_tfm = crypto_alloc_shash(hmac_name, 0, 0); 0f7847d23405a2 Hannes Reinecke 2021-09-10 243 if (IS_ERR(key_tfm)) 0f7847d23405a2 Hannes Reinecke 2021-09-10 244 return (u8 *)key_tfm; 0f7847d23405a2 Hannes Reinecke 2021-09-10 245 0f7847d23405a2 Hannes Reinecke 2021-09-10 246 shash = kmalloc(sizeof(struct shash_desc) + 0f7847d23405a2 Hannes Reinecke 2021-09-10 247 crypto_shash_descsize(key_tfm), 0f7847d23405a2 Hannes Reinecke 2021-09-10 248 GFP_KERNEL); 0f7847d23405a2 Hannes Reinecke 2021-09-10 249 if (!shash) { 0f7847d23405a2 Hannes Reinecke 2021-09-10 250 crypto_free_shash(key_tfm); 0f7847d23405a2 Hannes Reinecke 2021-09-10 251 return ERR_PTR(-ENOMEM); 0f7847d23405a2 Hannes Reinecke 2021-09-10 252 } 0f7847d23405a2 Hannes Reinecke 2021-09-10 253 transformed_key = kzalloc(crypto_shash_digestsize(key_tfm), GFP_KERNEL); 0f7847d23405a2 Hannes Reinecke 2021-09-10 254 if (!transformed_key) { 0f7847d23405a2 Hannes Reinecke 2021-09-10 255 ret = -ENOMEM; 0f7847d23405a2 Hannes Reinecke 2021-09-10 256 goto out_free_shash; 0f7847d23405a2 Hannes Reinecke 2021-09-10 257 } 0f7847d23405a2 Hannes Reinecke 2021-09-10 258 0f7847d23405a2 Hannes Reinecke 2021-09-10 259 shash->tfm = key_tfm; 0f7847d23405a2 Hannes Reinecke 2021-09-10 260 ret = crypto_shash_setkey(key_tfm, key, key_len); 0f7847d23405a2 Hannes Reinecke 2021-09-10 261 if (ret < 0) 0f7847d23405a2 Hannes Reinecke 2021-09-10 262 goto out_free_shash; 0f7847d23405a2 Hannes Reinecke 2021-09-10 263 ret = crypto_shash_init(shash); 0f7847d23405a2 Hannes Reinecke 2021-09-10 264 if (ret < 0) 0f7847d23405a2 Hannes Reinecke 2021-09-10 265 goto out_free_shash; 0f7847d23405a2 Hannes Reinecke 2021-09-10 266 ret = crypto_shash_update(shash, nqn, strlen(nqn)); 0f7847d23405a2 Hannes Reinecke 2021-09-10 267 if (ret < 0) 0f7847d23405a2 Hannes Reinecke 2021-09-10 268 goto out_free_shash; 0f7847d23405a2 Hannes Reinecke 2021-09-10 269 ret = crypto_shash_update(shash, "NVMe-over-Fabrics", 17); 0f7847d23405a2 Hannes Reinecke 2021-09-10 270 if (ret < 0) 0f7847d23405a2 Hannes Reinecke 2021-09-10 271 goto out_free_shash; 0f7847d23405a2 Hannes Reinecke 2021-09-10 272 ret = crypto_shash_final(shash, transformed_key); 0f7847d23405a2 Hannes Reinecke 2021-09-10 273 out_free_shash: 0f7847d23405a2 Hannes Reinecke 2021-09-10 274 kfree(shash); 0f7847d23405a2 Hannes Reinecke 2021-09-10 275 crypto_free_shash(key_tfm); 0f7847d23405a2 Hannes Reinecke 2021-09-10 276 if (ret < 0) { 0f7847d23405a2 Hannes Reinecke 2021-09-10 277 kfree_sensitive(transformed_key); 0f7847d23405a2 Hannes Reinecke 2021-09-10 278 return ERR_PTR(ret); 0f7847d23405a2 Hannes Reinecke 2021-09-10 279 } 0f7847d23405a2 Hannes Reinecke 2021-09-10 280 return transformed_key; 0f7847d23405a2 Hannes Reinecke 2021-09-10 281 } 0f7847d23405a2 Hannes Reinecke 2021-09-10 282 EXPORT_SYMBOL_GPL(nvme_auth_transform_key); 0f7847d23405a2 Hannes Reinecke 2021-09-10 283 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org