On Mon, Oct 17, 2022 at 11:17 AM kernel test robot <lkp@xxxxxxxxx> wrote: > > Hi Jack, > > Thank you for the patch! Perhaps something to improve: > > [auto build test WARNING on song-md/md-next] > [also build test WARNING on linus/master v6.1-rc1 next-20221017] > [If your patch is applied to the wrong git tree, kindly drop us a note. > And when submitting patch, we suggest to use '--base' as documented in > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > url: https://github.com/intel-lab-lkp/linux/commits/Jack-Wang/md-bitmap-Fix-bitmap-chunk-size-overflow-issues/20221017-103245 > base: git://git.kernel.org/pub/scm/linux/kernel/git/song/md.git md-next > patch link: https://lore.kernel.org/r/20221014122032.47784-1-jinpu.wang%40ionos.com > patch subject: [PATCH] md/bitmap: Fix bitmap chunk size overflow issues. > config: microblaze-randconfig-r032-20221017 > compiler: microblaze-linux-gcc (GCC) 12.1.0 > 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://github.com/intel-lab-lkp/linux/commit/68927a99dc7197ea076a3b40d876337073f70a58 > git remote add linux-review https://github.com/intel-lab-lkp/linux > git fetch --no-tags linux-review Jack-Wang/md-bitmap-Fix-bitmap-chunk-size-overflow-issues/20221017-103245 > git checkout 68927a99dc7197ea076a3b40d876337073f70a58 > # save the config file > mkdir build_dir && cp config build_dir/.config > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash drivers/md/ > > If you fix the issue, kindly add following tag where applicable > | Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>): > > drivers/md/md-bitmap.c: In function 'chunksize_store': > >> drivers/md/md-bitmap.c:2538:27: warning: left shift count >= width of type [-Wshift-count-overflow] > 2538 | if (csize >= (1UL << (BITS_PER_BYTE * > | ^~ > Thanks will fix in v2. > > vim +2538 drivers/md/md-bitmap.c > > 2523 > 2524 static ssize_t > 2525 chunksize_store(struct mddev *mddev, const char *buf, size_t len) > 2526 { > 2527 /* Can only be changed when no bitmap is active */ > 2528 int rv; > 2529 unsigned long csize; > 2530 if (mddev->bitmap) > 2531 return -EBUSY; > 2532 rv = kstrtoul(buf, 10, &csize); > 2533 if (rv) > 2534 return rv; > 2535 if (csize < 512 || > 2536 !is_power_of_2(csize)) > 2537 return -EINVAL; > > 2538 if (csize >= (1UL << (BITS_PER_BYTE * > 2539 sizeof(((bitmap_super_t *)0)->chunksize)))) > 2540 return -EOVERFLOW; > 2541 mddev->bitmap_info.chunksize = csize; > 2542 return len; > 2543 } > 2544 > > -- > 0-DAY CI Kernel Test Service > https://01.org/lkp
