Hi Steven, I love your patch! Perhaps something to improve: [auto build test WARNING on rostedt-trace/for-next] [also build test WARNING on linux/master linus/master hnaz-mm/master v5.16-rc8 next-20220107] [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/Steven-Rostedt/tracing-Fix-filtering-on-string-pointers/20220108-070047 base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next config: openrisc-randconfig-s031-20220107 (https://download.01.org/0day-ci/archive/20220109/202201090343.IKIQqdk4-lkp@xxxxxxxxx/config) compiler: or1k-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/19b8c1c0fee0d7bff07ed0d5862a29ac2bb4adc9 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Steven-Rostedt/tracing-Fix-filtering-on-string-pointers/20220108-070047 git checkout 19b8c1c0fee0d7bff07ed0d5862a29ac2bb4adc9 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=openrisc SHELL=/bin/bash kernel/trace/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str >> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@ kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr kernel/trace/trace_events_filter.c:685:22: sparse: got char *str kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@ kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter * kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter kernel/trace/trace_events_filter.c:1136:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct event_filter *filter @@ got struct event_filter [noderef] __rcu *filter @@ kernel/trace/trace_events_filter.c:1136:34: sparse: expected struct event_filter *filter kernel/trace/trace_events_filter.c:1136:34: sparse: got struct event_filter [noderef] __rcu *filter kernel/trace/trace_events_filter.c:1153:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct event_filter *filter @@ got struct event_filter [noderef] __rcu *filter @@ kernel/trace/trace_events_filter.c:1153:27: sparse: expected struct event_filter *filter kernel/trace/trace_events_filter.c:1153:27: sparse: got struct event_filter [noderef] __rcu *filter kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@ kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter * kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@ kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter * kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@ kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter * kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter vim +685 kernel/trace/trace_events_filter.c 666 667 static __always_inline char *test_string(char *str) 668 { 669 struct ustring_buffer *ubuf; 670 char __user *ustr; 671 char *kstr; 672 673 if (!ustring_per_cpu) 674 return NULL; 675 676 ubuf = this_cpu_ptr(ustring_per_cpu); 677 kstr = ubuf->buffer; 678 679 if (likely((unsigned long)str >= TASK_SIZE)) { 680 /* For safety, do not trust the string pointer */ 681 if (!strncpy_from_kernel_nofault(kstr, str, USTRING_BUF_SIZE)) 682 return NULL; 683 } else { 684 /* user space address? */ > 685 ustr = str; 686 if (!strncpy_from_user_nofault(kstr, ustr, USTRING_BUF_SIZE)) 687 return NULL; 688 } 689 return kstr; 690 } 691 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
