tree: https://github.com/intel/linux-intel-lts.git 4.19/android_r head: dbeb432ffcb6d39ce05d76a2e7d77c8656def48d commit: b652a52d36a85d1b731921ba08e701d7150ce200 [19120/22444] Merge branch 'aosp/android-4.19-stable' into android_r config: arm64-randconfig-s032-20210317 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 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: v0.6.3-277-gc089cd2d-dirty # https://github.com/intel/linux-intel-lts/commit/b652a52d36a85d1b731921ba0... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 4.19/android_r git checkout b652a52d36a85d1b731921ba08e701d7150ce200 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/media/v4l2-core/v4l2-compat-ioctl32.c:212:13: sparse: sparse: Using plain integer as NULL pointer drivers/media/v4l2-core/v4l2-compat-ioctl32.c:726:21: sparse: sparse: Using plain integer as NULL pointer drivers/media/v4l2-core/v4l2-compat-ioctl32.c:798:13: sparse: sparse: Using plain integer as NULL pointer drivers/media/v4l2-core/v4l2-compat-ioctl32.c:984:13: sparse: sparse: Using plain integer as NULL pointer drivers/media/v4l2-core/v4l2-compat-ioctl32.c:1068:13: sparse: expected struct v4l2_subdev_route *__pu_val drivers/media/v4l2-core/v4l2-compat-ioctl32.c:1068:13: sparse: got void [noderef] <asn:1> * drivers/media/v4l2-core/v4l2-compat-ioctl32.c:1138:13: sparse: sparse: Using plain integer as NULL pointer vim +1068 drivers/media/v4l2-core/v4l2-compat-ioctl32.c dcdab0d72b69b62 Meng Wei 2018-10-26 1059 dcdab0d72b69b62 Meng Wei 2018-10-26 1060 static int get_v4l2_subdev_routing(struct v4l2_subdev_routing __user *kp, dcdab0d72b69b62 Meng Wei 2018-10-26 1061 struct v4l2_subdev_routing32 __user *up) dcdab0d72b69b62 Meng Wei 2018-10-26 1062 { dcdab0d72b69b62 Meng Wei 2018-10-26 1063 compat_caddr_t p; dcdab0d72b69b62 Meng Wei 2018-10-26 1064 u32 num_routes; dcdab0d72b69b62 Meng Wei 2018-10-26 1065 dcdab0d72b69b62 Meng Wei 2018-10-26 1066 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || dcdab0d72b69b62 Meng Wei 2018-10-26 1067 get_user(p, &up->routes) || dcdab0d72b69b62 Meng Wei 2018-10-26 @1068 put_user(compat_ptr(p), &kp->routes) || dcdab0d72b69b62 Meng Wei 2018-10-26 1069 get_user(num_routes, &kp->num_routes) || dcdab0d72b69b62 Meng Wei 2018-10-26 1070 assign_in_user(&kp->num_routes, &up->num_routes) || dcdab0d72b69b62 Meng Wei 2018-10-26 1071 !access_ok(VERIFY_READ, up->reserved, sizeof(*up->reserved)) || dcdab0d72b69b62 Meng Wei 2018-10-26 1072 num_routes > U32_MAX / sizeof(*kp->routes)) dcdab0d72b69b62 Meng Wei 2018-10-26 1073 return -EFAULT; dcdab0d72b69b62 Meng Wei 2018-10-26 1074 dcdab0d72b69b62 Meng Wei 2018-10-26 1075 if (!access_ok(VERIFY_READ, compat_ptr(p), dcdab0d72b69b62 Meng Wei 2018-10-26 1076 num_routes * (u32)sizeof(*kp->routes))) dcdab0d72b69b62 Meng Wei 2018-10-26 1077 return -EFAULT; dcdab0d72b69b62 Meng Wei 2018-10-26 1078 dcdab0d72b69b62 Meng Wei 2018-10-26 1079 return 0; dcdab0d72b69b62 Meng Wei 2018-10-26 1080 } dcdab0d72b69b62 Meng Wei 2018-10-26 1081 :::::: The code at line 1068 was first introduced by commit :::::: dcdab0d72b69b6291d08483c0baf62cf92e2a1bc v4l: subdev: Add [GS]_ROUTING subdev ioctls and operations :::::: TO: Meng Wei <wei.meng(a)intel.com&gt; :::::: CC: Pan, Kris <kris.pan(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org