Hi Iskren, Thank you for the patch! Yet something to improve: [auto build test ERROR on next-20201125] [also build test ERROR on 6147c83fd749d19a0d3ccc2f64d12138ab010b47] [cannot apply to drm-intel/for-linux-next drm-tip/drm-tip linus/master robclark/msm-next v5.10-rc5 v5.10-rc4 v5.10-rc3 v5.10-rc5] [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] url: https://github.com/0day-ci/linux/commits/Iskren-Chernev/drm-msm-Fix-use-after-free-in-msm_gem-with-carveout/20201126-163426 base: 9d3e48f20e1159a7bb2ff5de96594b6375157fe0 config: arm-defconfig (attached as .config) compiler: arm-linux-gnueabi-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://github.com/0day-ci/linux/commit/b08a39143f118f378b9fbb9ccfa03999dc419b1c git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Iskren-Chernev/drm-msm-Fix-use-after-free-in-msm_gem-with-carveout/20201126-163426 git checkout b08a39143f118f378b9fbb9ccfa03999dc419b1c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/current.h:5, from ./arch/arm/include/generated/asm/current.h:1, from include/linux/sched.h:12, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/dma-mapping.h:7, from include/linux/dma-map-ops.h:9, from drivers/gpu/drm/msm/msm_gem.c:7: drivers/gpu/drm/msm/msm_gem.c: In function 'put_iova_vmas': >> drivers/gpu/drm/msm/msm_gem.c:380:35: error: 'struct msm_gem_object' has no member named 'lock' 380 | WARN_ON(!mutex_is_locked(&msm_obj->lock)); | ^~ include/asm-generic/bug.h:119:25: note: in definition of macro 'WARN_ON' 119 | int __ret_warn_on = !!(condition); \ | ^~~~~~~~~ drivers/gpu/drm/msm/msm_gem.c: In function 'msm_gem_free_object': >> drivers/gpu/drm/msm/msm_gem.c:983:2: error: implicit declaration of function 'put_iova_vma'; did you mean 'put_iova_vmas'? [-Werror=implicit-function-declaration] 983 | put_iova_vma(obj); | ^~~~~~~~~~~~ | put_iova_vmas cc1: some warnings being treated as errors vim +380 drivers/gpu/drm/msm/msm_gem.c 372 373 /* Called with msm_obj locked */ 374 static void 375 put_iova_vmas(struct drm_gem_object *obj) 376 { 377 struct msm_gem_object *msm_obj = to_msm_bo(obj); 378 struct msm_gem_vma *vma, *tmp; 379 > 380 WARN_ON(!mutex_is_locked(&msm_obj->lock)); 381 382 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { 383 del_vma(vma); 384 } 385 } 386 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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