On Tue, Nov 24, 2020 at 9:02 AM Rong Chen <rong.a.chen@xxxxxxxxx> wrote: > > On 11/23/20 10:15 PM, Andrey Konovalov wrote: > > On Thu, Nov 19, 2020 at 11:16 PM kernel test robot <lkp@xxxxxxxxx> wrote: > >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > >> head: 3494d58865ad4a47611dbb427b214cc5227fa5eb > >> commit: cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 kasan: allow enabling stack tagging for tag-based mode > >> date: 3 months ago > >> config: arm64-randconfig-r002-20201119 (attached as .config) > >> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2613fb2f0f53691dd0211895afbb9413457fca7) > >> 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 arm64 cross compiling tool for clang build > >> # apt-get install binutils-aarch64-linux-gnu > >> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 > >> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > >> git fetch --no-tags linus master > >> git checkout cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 > >> # save the attached .config to linux build tree > >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 > >> > >> 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/net/wan/slic_ds26522.c:205:12: warning: stack frame size of 12288 bytes in function 'slic_ds26522_probe' [-Wframe-larger-than=] > >> static int slic_ds26522_probe(struct spi_device *spi) > >> ^ > >> 1 warning generated. > >> -- > >>>> drivers/gpu/drm/panel/panel-sitronix-st7789v.c:194:12: warning: stack frame size of 18352 bytes in function 'st7789v_prepare' [-Wframe-larger-than=] > >> static int st7789v_prepare(struct drm_panel *panel) > >> ^ > >> 1 warning generated. > > Same issue as reported previously. Copying my response from the other > > email just in case: > > > > This is the same issue in LLVM that was reported by Arnd for generic > > KASAN (also see KASAN_STACK_ENABLE option description). By default > > KASAN shouldn't have stack instrumentation enabled unless > > KASAN_STACK_ENABLE is specified. Perhaps it makes sense to disable it > > for KASAN_SW_TAGS config on the kernel test robot. > > > > [1] https://bugs.llvm.org/show_bug.cgi?id=38809 > > Hi Andrey, > > Thanks for the explanation, we'll disable CONFIG_KASAN_SW_TAGS. Hi Rong, No, no, if you have a CONFIG_KASAN_SW_TAGS-based config - keep it enabled, just disable CONFIG_KASAN_STACK_ENABLE to avoid these stack overflows. Thanks!
