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Sat, 20 Aug 2022 08:36:07 +0000 Date: Sat, 20 Aug 2022 16:35:55 +0800 From: kernel test robot To: Jens Wiklander Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Sasha Levin , Greg Kroah-Hartman Subject: [linux-stable-rc:queue/5.4 285/287] drivers/tee/tee_shm.c:242:14: error: implicit declaration of function 'access_ok' Message-ID: <202208201640.D1cUWPeR-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git queue/5.4 head: 7ef356c708cbb2e28b3adaaf8bb6011f50fe4ee5 commit: 51bcd4a8616806b5ecfaa54dfacf072cc920a3aa [285/287] tee: add overflow check in register_shm_helper() config: powerpc-randconfig-s033-20220820 (https://download.01.org/0day-ci/archive/20220820/202208201640.D1cUWPeR-lkp@intel.com/config) compiler: powerpc-linux-gcc (GCC) 12.1.0 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: v0.6.4-39-gce1a6720-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=51bcd4a8616806b5ecfaa54dfacf072cc920a3aa git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc queue/5.4 git checkout 51bcd4a8616806b5ecfaa54dfacf072cc920a3aa # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/tee/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All errors (new ones prefixed by >>): drivers/tee/tee_shm.c: In function 'tee_shm_register': >> drivers/tee/tee_shm.c:242:14: error: implicit declaration of function 'access_ok' [-Werror=implicit-function-declaration] 242 | if (!access_ok((void __user *)addr, length)) | ^~~~~~~~~ cc1: some warnings being treated as errors vim +/access_ok +242 drivers/tee/tee_shm.c 168 169 struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, 170 size_t length, u32 flags) 171 { 172 struct tee_device *teedev = ctx->teedev; 173 const u32 req_flags = TEE_SHM_DMA_BUF | TEE_SHM_USER_MAPPED; 174 struct tee_shm *shm; 175 void *ret; 176 int rc; 177 int num_pages; 178 unsigned long start; 179 180 if (flags != req_flags) 181 return ERR_PTR(-ENOTSUPP); 182 183 if (!tee_device_get(teedev)) 184 return ERR_PTR(-EINVAL); 185 186 if (!teedev->desc->ops->shm_register || 187 !teedev->desc->ops->shm_unregister) { 188 tee_device_put(teedev); 189 return ERR_PTR(-ENOTSUPP); 190 } 191 192 teedev_ctx_get(ctx); 193 194 shm = kzalloc(sizeof(*shm), GFP_KERNEL); 195 if (!shm) { 196 ret = ERR_PTR(-ENOMEM); 197 goto err; 198 } 199 200 refcount_set(&shm->refcount, 1); 201 shm->flags = flags | TEE_SHM_REGISTER; 202 shm->teedev = teedev; 203 shm->ctx = ctx; 204 shm->id = -1; 205 addr = untagged_addr(addr); 206 start = rounddown(addr, PAGE_SIZE); 207 shm->offset = addr - start; 208 shm->size = length; 209 num_pages = (roundup(addr + length, PAGE_SIZE) - start) / PAGE_SIZE; 210 shm->pages = kcalloc(num_pages, sizeof(*shm->pages), GFP_KERNEL); 211 if (!shm->pages) { 212 ret = ERR_PTR(-ENOMEM); 213 goto err; 214 } 215 216 rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages); 217 if (rc > 0) 218 shm->num_pages = rc; 219 if (rc != num_pages) { 220 if (rc >= 0) 221 rc = -ENOMEM; 222 ret = ERR_PTR(rc); 223 goto err; 224 } 225 226 mutex_lock(&teedev->mutex); 227 shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL); 228 mutex_unlock(&teedev->mutex); 229 230 if (shm->id < 0) { 231 ret = ERR_PTR(shm->id); 232 goto err; 233 } 234 235 rc = teedev->desc->ops->shm_register(ctx, shm, shm->pages, 236 shm->num_pages, start); 237 if (rc) { 238 ret = ERR_PTR(rc); 239 goto err; 240 } 241 > 242 if (!access_ok((void __user *)addr, length)) 243 return ERR_PTR(-EFAULT); 244 245 mutex_lock(&teedev->mutex); 246 list_add_tail(&shm->link, &ctx->list_shm); 247 mutex_unlock(&teedev->mutex); 248 249 return shm; 250 err: 251 if (shm) { 252 size_t n; 253 254 if (shm->id >= 0) { 255 mutex_lock(&teedev->mutex); 256 idr_remove(&teedev->idr, shm->id); 257 mutex_unlock(&teedev->mutex); 258 } 259 if (shm->pages) { 260 for (n = 0; n < shm->num_pages; n++) 261 put_page(shm->pages[n]); 262 kfree(shm->pages); 263 } 264 } 265 kfree(shm); 266 teedev_ctx_put(ctx); 267 tee_device_put(teedev); 268 return ret; 269 } 270 EXPORT_SYMBOL_GPL(tee_shm_register); 271 -- 0-DAY CI Kernel Test Service https://01.org/lkp