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Mon, 28 Mar 2022 09:22:42 +0000 Date: Mon, 28 Mar 2022 17:22:06 +0800 From: kernel test robot To: Beau Belgrave Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, "Steven Rostedt (Google)" Subject: kernel/trace/trace_events_user.c:392:38: sparse: sparse: Using plain integer as NULL pointer Message-ID: <202203281754.okRdoDAL-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ae085d7f9365de7da27ab5c0d16b12d51ea7fca9 commit: aa3b2b4c669205200615dd8a2cc4af4f81fd0335 user_events: Add print_fmt generation support for basic types date: 6 weeks ago config: i386-randconfig-s001-20220328 (https://download.01.org/0day-ci/archive/20220328/202203281754.okRdoDAL-lkp@intel.com/config) compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aa3b2b4c669205200615dd8a2cc4af4f81fd0335 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout aa3b2b4c669205200615dd8a2cc4af4f81fd0335 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/acpi/apei/ drivers/gpu/drm/ kernel/trace/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) >> kernel/trace/trace_events_user.c:392:38: sparse: sparse: Using plain integer as NULL pointer kernel/trace/trace_events_user.c:413:40: sparse: sparse: Using plain integer as NULL pointer kernel/trace/trace_events_user.c:858:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/trace_events_user.c:858:16: sparse: void [noderef] __rcu * kernel/trace/trace_events_user.c:858:16: sparse: void * kernel/trace/trace_events_user.c:922:13: sparse: sparse: cast removes address space '__user' of expression kernel/trace/trace_events_user.c:922:13: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __user *buf @@ got char * @@ kernel/trace/trace_events_user.c:922:13: sparse: expected void [noderef] __user *buf kernel/trace/trace_events_user.c:922:13: sparse: got char * kernel/trace/trace_events_user.c:938:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/trace_events_user.c:938:16: sparse: void [noderef] __rcu * kernel/trace/trace_events_user.c:938:16: sparse: void * kernel/trace/trace_events_user.c:965:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/trace_events_user.c:965:9: sparse: void [noderef] __rcu * kernel/trace/trace_events_user.c:965:9: sparse: void * vim +392 kernel/trace/trace_events_user.c 361 362 static const char *user_field_format(const char *type) 363 { 364 if (strcmp(type, "s64") == 0) 365 return "%lld"; 366 if (strcmp(type, "u64") == 0) 367 return "%llu"; 368 if (strcmp(type, "s32") == 0) 369 return "%d"; 370 if (strcmp(type, "u32") == 0) 371 return "%u"; 372 if (strcmp(type, "int") == 0) 373 return "%d"; 374 if (strcmp(type, "unsigned int") == 0) 375 return "%u"; 376 if (strcmp(type, "s16") == 0) 377 return "%d"; 378 if (strcmp(type, "u16") == 0) 379 return "%u"; 380 if (strcmp(type, "short") == 0) 381 return "%d"; 382 if (strcmp(type, "unsigned short") == 0) 383 return "%u"; 384 if (strcmp(type, "s8") == 0) 385 return "%d"; 386 if (strcmp(type, "u8") == 0) 387 return "%u"; 388 if (strcmp(type, "char") == 0) 389 return "%d"; 390 if (strcmp(type, "unsigned char") == 0) 391 return "%u"; > 392 if (strstr(type, "char[") != 0) 393 return "%s"; 394 395 /* Unknown, likely struct, allowed treat as 64-bit */ 396 return "%llu"; 397 } 398 -- 0-DAY CI Kernel Test Service https://01.org/lkp