Hi Jacopo, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f873db9acd3c92d4741bc3676c9eb511b2f9a6f6 commit: b18ee53ad297264a79cf4ea566663f20786b6455 staging: bcm2835: Break MMAL support out from camera date: 8 weeks ago config: ia64-randconfig-r035-20200822 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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 git checkout b18ee53ad297264a79cf4ea566663f20786b6455 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c: In function 'create_component': 932 | strncpy(m.u.component_create.name, name, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 933 | sizeof(m.u.component_create.name)); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b18ee53ad297264a79cf4ea566663f20786b6455 vim +/strncpy +932 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 918 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 919 /* create comonent on vc */ 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 920 static int create_component(struct vchiq_mmal_instance *instance, 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 921 struct vchiq_mmal_component *component, 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 922 const char *name) 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 923 { 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 924 int ret; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 925 struct mmal_msg m; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 926 struct mmal_msg *rmsg; 9d4d3ac473912a drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c Dominic Braun 2018-12-14 927 struct vchi_held_msg rmsg_handle; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 928 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 929 /* build component create message */ 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 930 m.h.type = MMAL_MSG_TYPE_COMPONENT_CREATE; 4fe08093094e5f drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c Michael Zoran 2017-03-09 931 m.u.component_create.client_component = (u32)(unsigned long)component; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 @932 strncpy(m.u.component_create.name, name, 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 933 sizeof(m.u.component_create.name)); 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 934 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 935 ret = send_synchronous_mmal_msg(instance, &m, 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 936 sizeof(m.u.component_create), 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 937 &rmsg, &rmsg_handle); 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 938 if (ret) 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 939 return ret; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 940 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 941 if (rmsg->h.type != m.h.type) { 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 942 /* got an unexpected message type in reply */ 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 943 ret = -EINVAL; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 944 goto release_msg; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 945 } 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 946 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 947 ret = -rmsg->u.component_create_reply.status; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 948 if (ret != MMAL_MSG_STATUS_SUCCESS) 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 949 goto release_msg; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 950 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 951 /* a valid component response received */ 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 952 component->handle = rmsg->u.component_create_reply.component_handle; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 953 component->inputs = rmsg->u.component_create_reply.input_num; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 954 component->outputs = rmsg->u.component_create_reply.output_num; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 955 component->clocks = rmsg->u.component_create_reply.clock_num; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 956 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 957 pr_debug("Component handle:0x%x in:%d out:%d clock:%d\n", 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 958 component->handle, 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 959 component->inputs, component->outputs, component->clocks); 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 960 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 961 release_msg: 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 962 vchi_held_msg_release(&rmsg_handle); 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 963 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 964 return ret; 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 965 } 7b3ad5abf027b7 drivers/staging/media/platform/bcm2835/mmal-vchiq.c Eric Anholt 2017-01-27 966 :::::: The code at line 932 was first introduced by commit :::::: 7b3ad5abf027b7643b38c4006d7f4ce47a86dd3a staging: Import the BCM2835 MMAL-based V4L2 camera driver. :::::: TO: Eric Anholt <eric(a)anholt.net&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org