tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ab774587903771821b59471cc723bba6d893942 commit: 617d5b34f22c66fe9fc9f150be27f5de1b87ca15 drm/ttm: Try to check if new ttm man out of bounds during compile date: 9 weeks ago config: x86_64-randconfig-a014-20210927 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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/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 617d5b34f22c66fe9fc9f150be27f5de1b87ca15 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/ttm/ kernel/locking/ 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 >>): vim +144 drivers/gpu/drm/ttm/ttm_range_manager.c 98399abd52b234 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 129 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 130 /** 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 131 * ttm_range_man_init 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 132 * 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 133 * @bdev: ttm device 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 134 * @type: memory manager type 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 135 * @use_tt: if the memory manager uses tt 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 136 * @p_size: size of area to be managed in pages. 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 137 * 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 138 * Initialise a generic range manager for the selected memory type. 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 139 * The range manager is installed for this device in the type slot. 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 140 */ 617d5b34f22c66 drivers/gpu/drm/ttm/ttm_range_manager.c xinhui pan 2021-09-13 141 int ttm_range_man_init_nocheck(struct ttm_device *bdev, 9c3006a4cc1b16 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2020-09-11 142 unsigned type, bool use_tt, d961db75ce86a8 drivers/gpu/drm/ttm/ttm_bo_manager.c Ben Skeggs 2010-08-05 143 unsigned long p_size) d961db75ce86a8 drivers/gpu/drm/ttm/ttm_bo_manager.c Ben Skeggs 2010-08-05 @144 { 9de59bc201496f drivers/gpu/drm/ttm/ttm_range_manager.c Dave Airlie 2020-08-04 145 struct ttm_resource_manager *man; d7a67cb16238ab drivers/gpu/drm/ttm/ttm_bo_manager.c Thomas Hellstrom 2010-10-29 146 struct ttm_range_manager *rman; d961db75ce86a8 drivers/gpu/drm/ttm/ttm_bo_manager.c Ben Skeggs 2010-08-05 147 d7a67cb16238ab drivers/gpu/drm/ttm/ttm_bo_manager.c Thomas Hellstrom 2010-10-29 148 rman = kzalloc(sizeof(*rman), GFP_KERNEL); d7a67cb16238ab drivers/gpu/drm/ttm/ttm_bo_manager.c Thomas Hellstrom 2010-10-29 149 if (!rman) d961db75ce86a8 drivers/gpu/drm/ttm/ttm_bo_manager.c Ben Skeggs 2010-08-05 150 return -ENOMEM; d961db75ce86a8 drivers/gpu/drm/ttm/ttm_bo_manager.c Ben Skeggs 2010-08-05 151 3a1fc38edac75d drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 152 man = &rman->manager; 3a1fc38edac75d drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 153 man->use_tt = use_tt; 3a1fc38edac75d drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 154 80938c28ee67ba drivers/gpu/drm/ttm/ttm_range_manager.c Dave Airlie 2020-08-04 155 man->func = &ttm_range_manager_func; 37205891d84f92 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 156 9de59bc201496f drivers/gpu/drm/ttm/ttm_range_manager.c Dave Airlie 2020-08-04 157 ttm_resource_manager_init(man, p_size); 37205891d84f92 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 158 77ef8bbc87be7a drivers/gpu/drm/ttm/ttm_bo_manager.c David Herrmann 2013-07-01 159 drm_mm_init(&rman->mm, 0, p_size); d7a67cb16238ab drivers/gpu/drm/ttm/ttm_bo_manager.c Thomas Hellstrom 2010-10-29 160 spin_lock_init(&rman->lock); d961db75ce86a8 drivers/gpu/drm/ttm/ttm_bo_manager.c Ben Skeggs 2010-08-05 161 3a1fc38edac75d drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 162 ttm_set_driver_manager(bdev, type, &rman->manager); 9de59bc201496f drivers/gpu/drm/ttm/ttm_range_manager.c Dave Airlie 2020-08-04 163 ttm_resource_manager_set_used(man, true); 3c90424bd7df15 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 164 return 0; 3c90424bd7df15 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 165 } 617d5b34f22c66 drivers/gpu/drm/ttm/ttm_range_manager.c xinhui pan 2021-09-13 166 EXPORT_SYMBOL(ttm_range_man_init_nocheck); 3c90424bd7df15 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 167 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 168 /** 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 169 * ttm_range_man_fini 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 170 * 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 171 * @bdev: ttm device 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 172 * @type: memory manager type 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 173 * 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 174 * Remove the generic range manager from a slot and tear it down. 3eb7d96e941503 drivers/gpu/drm/ttm/ttm_range_manager.c Christian König 2021-04-17 175 */ 617d5b34f22c66 drivers/gpu/drm/ttm/ttm_range_manager.c xinhui pan 2021-09-13 176 int ttm_range_man_fini_nocheck(struct ttm_device *bdev, 37205891d84f92 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 177 unsigned type) 56ee8b1c71ffb5 drivers/gpu/drm/ttm/ttm_bo_manager.c Dave Airlie 2020-08-04 @178 { :::::: The code at line 144 was first introduced by commit :::::: d961db75ce86a84f1f04e91ad1014653ed7d9f46 drm/ttm: restructure to allow driver to plug in alternate memory manager :::::: TO: Ben Skeggs <bskeggs(a)redhat.com&gt; :::::: CC: Ben Skeggs <bskeggs(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org