[kbuild-all] [gustavoars-linux:testing/uapi/nfsd/nfsfh 1/2] drivers/media/pci/ngene/ngene-core.c:388:2: warning: 'memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10

tree: https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/uapi/nfsd/nfsfh head: d28670226e028e65b0de5e6744c5df188fc2728b commit: 5c976c3f03be89378ca672c1a3c7ce7048d90606 [1/2] Makefile: Enable -Warray-bounds config: riscv-randconfig-r004-20210209 (attached as .config) compiler: riscv64-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 # https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/comm... git remote add gustavoars-linux https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git git fetch --no-tags gustavoars-linux testing/uapi/nfsd/nfsfh git checkout 5c976c3f03be89378ca672c1a3c7ce7048d90606 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 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/media/pci/ngene/ngene-core.c: In function 'ngene_command_config_free_buf': 388 | memcpy(&com.cmd.ConfigureBuffers.config, config, 6); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +388 drivers/media/pci/ngene/ngene-core.c dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 381 dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 382 static int ngene_command_config_free_buf(struct ngene *dev, u8 *config) dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 383 { dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 384 struct ngene_command com; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 385 dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 386 com.cmd.hdr.Opcode = CMD_CONFIGURE_FREE_BUFFER; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 387 com.cmd.hdr.Length = 6; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 @388 memcpy(&com.cmd.ConfigureBuffers.config, config, 6); dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 389 com.in_len = 6; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 390 com.out_len = 0; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 391 dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 392 if (ngene_command(dev, &com) < 0) dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 393 return -EIO; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 394 dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 395 return 0; dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 396 } dae52d009fc950 drivers/media/dvb/ngene/ngene-core.c Matthias Benesch 2009-12-18 397 :::::: The code at line 388 was first introduced by commit :::::: dae52d009fc950b5c209260d50fcc000f5becd3c V4L/DVB: ngene: Initial check-in :::::: TO: Matthias Benesch <twoof7(a)freenet.de&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org