On Sun, 27 Sep 2020 at 22:14, kernel test robot <lkp@xxxxxxxxx> wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 20dc779fdefc40bf7dd9736cea01704f29228fae > commit: 2ce416ba162877d5cf267ac35548ea45eba84150 [11080/11173] ubsan: introduce CONFIG_UBSAN_LOCAL_BOUNDS for Clang > config: powerpc-randconfig-r004-20200927 (attached as .config) > compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6d374cf78c8a80a0bbfc7ce9bc80b3f183f44c80) > 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 > # install powerpc cross compiling tool for clang build > # apt-get install binutils-powerpc-linux-gnu > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=2ce416ba162877d5cf267ac35548ea45eba84150 > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout 2ce416ba162877d5cf267ac35548ea45eba84150 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>): > > >> drivers/media/common/saa7146/saa7146_hlp.c:648:5: warning: stack frame size of 1072 bytes in function 'saa7146_enable_overlay' [-Wframe-larger-than=] > int saa7146_enable_overlay(struct saa7146_fh *fh) > ^ > 1 warning generated. This warning must have existed before, because the UBSAN patch didn't add any features, it just guarded them with extra Kconfig options. Also, this is with Clang 12, which is very much in development and quite unstable. > vim +/saa7146_enable_overlay +648 drivers/media/common/saa7146/saa7146_hlp.c > > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 647 > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 @648 int saa7146_enable_overlay(struct saa7146_fh *fh) > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 649 { > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 650 struct saa7146_dev *dev = fh->dev; > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 651 struct saa7146_vv *vv = dev->vv_data; > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 652 > 5da545ad08a3c6 drivers/media/common/saa7146_hlp.c Hans Verkuil 2012-05-01 653 saa7146_set_window(dev, vv->ov.win.w.width, vv->ov.win.w.height, vv->ov.win.field); > 5da545ad08a3c6 drivers/media/common/saa7146_hlp.c Hans Verkuil 2012-05-01 654 saa7146_set_position(dev, vv->ov.win.w.left, vv->ov.win.w.top, vv->ov.win.w.height, vv->ov.win.field, vv->ov_fmt->pixelformat); > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 655 saa7146_set_output_format(dev, vv->ov_fmt->trans); > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 656 saa7146_set_clipping_rect(fh); > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 657 > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 658 /* enable video dma1 */ > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 659 saa7146_write(dev, MC1, (MASK_06 | MASK_22)); > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 660 return 0; > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 661 } > ^1da177e4c3f41 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 662 > > :::::: The code at line 648 was first introduced by commit > :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 > > :::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> > :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
