Hi Yejune, url: https://github.com/0day-ci/linux/commits/Yejune-Deng/ntp-use-memset-and-o... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 3cabca87b329cbcbdf295be0094adbd72c7b1f67 config: i386-randconfig-m021-20210120 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: kernel/time/ntp.c:232 pps_fill_timex() warn: potential pointer math issue ('txc' is a 1664 bit pointer) vim +232 kernel/time/ntp.c ead25417f82ed7f8 Deepa Dinamani 2018-07-02 225 static inline void pps_fill_timex(struct __kernel_timex *txc) 025b40abe715d638 Alexander Gordeev 2011-01-12 226 { 025b40abe715d638 Alexander Gordeev 2011-01-12 227 /* PPS is not implemented, so these are zero */ a29bace5d3c06a35 Yejune Deng 2021-01-20 228 int offset, len; a29bace5d3c06a35 Yejune Deng 2021-01-20 229 a29bace5d3c06a35 Yejune Deng 2021-01-20 230 offset = offsetof(struct __kernel_timex, ppsfreq); a29bace5d3c06a35 Yejune Deng 2021-01-20 231 len = offsetof(struct __kernel_timex, tai) - offset; a29bace5d3c06a35 Yejune Deng 2021-01-20 @232 memset(txc + offset, 0, len); ^^^^^^^^^^^^ The warning message is badly phrased. This needs to be: memset((u8 *)txc + offset, 0, len); The current code will corrupt memory if offset is non-zero. 025b40abe715d638 Alexander Gordeev 2011-01-12 233 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org _______________________________________________ kbuild mailing list -- kbuild(a)lists.01.org To unsubscribe send an email to kbuild-leave(a)lists.01.org