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Sat, 25 Jun 2022 09:37:00 +0000 Date: Sat, 25 Jun 2022 17:36:34 +0800 From: kernel test robot To: Kefeng Wang Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Catalin Marinas Subject: drivers/message/fusion/mptctl.c:1492:9: warning: 'strncpy' output may be truncated copying 31 bytes from a string of length 31 Message-ID: <202206251758.8S6r2m0M-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 Hi Kefeng, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8c23f235a6a8ae43abea215812eb9d8cf4dd165e commit: dd03762ab608e058c8f390ad9cf667e490089796 arm64: Enable KCSAN date: 6 months ago config: arm64-randconfig-r015-20220625 compiler: aarch64-linux-gcc (GCC) 11.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dd03762ab608e058c8f390ad9cf667e490089796 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout dd03762ab608e058c8f390ad9cf667e490089796 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/message/fusion/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): drivers/message/fusion/mptctl.c: In function 'mptctl_do_mpt_command': drivers/message/fusion/mptctl.c:1823:27: warning: variable 'config_frame' set but not used [-Wunused-but-set-variable] 1823 | Config_t *config_frame; | ^~~~~~~~~~~~ drivers/message/fusion/mptctl.c:2003:34: warning: variable 'pScsiTm' set but not used [-Wunused-but-set-variable] 2003 | SCSITaskMgmt_t *pScsiTm; | ^~~~~~~ drivers/message/fusion/mptctl.c: In function 'mptctl_hp_hostinfo': drivers/message/fusion/mptctl.c:2329:33: warning: variable 'retval' set but not used [-Wunused-but-set-variable] 2329 | int retval; | ^~~~~~ In function 'mptctl_readtest', inlined from '__mptctl_ioctl.isra' at drivers/message/fusion/mptctl.c:661:10: >> drivers/message/fusion/mptctl.c:1492:9: warning: 'strncpy' output may be truncated copying 31 bytes from a string of length 31 [-Wstringop-truncation] 1492 | strncpy (karg.name, ioc->name, MPT_MAX_NAME); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/strncpy +1492 drivers/message/fusion/mptctl.c ^1da177e4c3f415 Linus Torvalds 2005-04-16 1459 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1460 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1461 /* MPT IOCTL Test function. ^1da177e4c3f415 Linus Torvalds 2005-04-16 1462 * ^1da177e4c3f415 Linus Torvalds 2005-04-16 1463 * Outputs: None. ^1da177e4c3f415 Linus Torvalds 2005-04-16 1464 * Return: 0 if successful ^1da177e4c3f415 Linus Torvalds 2005-04-16 1465 * -EFAULT if data unavailable ^1da177e4c3f415 Linus Torvalds 2005-04-16 1466 * -ENODEV if no such device/adapter ^1da177e4c3f415 Linus Torvalds 2005-04-16 1467 */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1468 static int 28d76df18f0ad5b Dan Carpenter 2020-01-14 1469 mptctl_readtest (MPT_ADAPTER *ioc, unsigned long arg) ^1da177e4c3f415 Linus Torvalds 2005-04-16 1470 { ^1da177e4c3f415 Linus Torvalds 2005-04-16 1471 struct mpt_ioctl_test __user *uarg = (void __user *) arg; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1472 struct mpt_ioctl_test karg; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1473 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1474 if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_test))) { 29dd3609f2fc70e Eric Moore 2007-09-14 1475 printk(KERN_ERR MYNAM "%s@%d::mptctl_readtest - " ^1da177e4c3f415 Linus Torvalds 2005-04-16 1476 "Unable to read in mpt_ioctl_test struct @ %p\n", ^1da177e4c3f415 Linus Torvalds 2005-04-16 1477 __FILE__, __LINE__, uarg); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1478 return -EFAULT; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1479 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1480 09120a8cd38dbdb Prakash, Sathya 2007-07-24 1481 dctlprintk(ioc, printk(MYIOC_s_DEBUG_FMT "mptctl_readtest called.\n", 09120a8cd38dbdb Prakash, Sathya 2007-07-24 1482 ioc->name)); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1483 /* Fill in the data and return the structure to the calling ^1da177e4c3f415 Linus Torvalds 2005-04-16 1484 * program ^1da177e4c3f415 Linus Torvalds 2005-04-16 1485 */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1486 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1487 #ifdef MFCNT ^1da177e4c3f415 Linus Torvalds 2005-04-16 1488 karg.chip_type = ioc->mfcnt; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1489 #else ^1da177e4c3f415 Linus Torvalds 2005-04-16 1490 karg.chip_type = ioc->pcidev->device; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1491 #endif ^1da177e4c3f415 Linus Torvalds 2005-04-16 @1492 strncpy (karg.name, ioc->name, MPT_MAX_NAME); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1493 karg.name[MPT_MAX_NAME-1]='\0'; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1494 strncpy (karg.product, ioc->prod_name, MPT_PRODUCT_LENGTH); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1495 karg.product[MPT_PRODUCT_LENGTH-1]='\0'; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1496 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1497 /* Copy the data from kernel memory to user memory ^1da177e4c3f415 Linus Torvalds 2005-04-16 1498 */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1499 if (copy_to_user((char __user *)arg, &karg, sizeof(struct mpt_ioctl_test))) { 29dd3609f2fc70e Eric Moore 2007-09-14 1500 printk(MYIOC_s_ERR_FMT "%s@%d::mptctl_readtest - " ^1da177e4c3f415 Linus Torvalds 2005-04-16 1501 "Unable to write out mpt_ioctl_test struct @ %p\n", 29dd3609f2fc70e Eric Moore 2007-09-14 1502 ioc->name, __FILE__, __LINE__, uarg); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1503 return -EFAULT; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1504 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1505 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1506 return 0; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1507 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1508 :::::: The code at line 1492 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://01.org/lkp