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Message-ID: <202412292037.LXlYSHKl-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 059dd502b263d8a4e2a84809cf1068d6a3905e6f commit: b90d77e5fd784ada62ddd714d15ee2400c28e1cf bpf: Fix remap of arena. date: 6 months ago config: x86_64-randconfig-104-20241229 (https://download.01.org/0day-ci/archive/20241229/202412292037.LXlYSHKl-lkp@intel.com/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202412292037.LXlYSHKl-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> kernel/bpf/arena.c:245:6-25: WARNING: atomic_dec_and_test variation before object free at line 249. vim +245 kernel/bpf/arena.c 238 239 static void arena_vm_close(struct vm_area_struct *vma) 240 { 241 struct bpf_map *map = vma->vm_file->private_data; 242 struct bpf_arena *arena = container_of(map, struct bpf_arena, map); 243 struct vma_list *vml = vma->vm_private_data; 244 > 245 if (!atomic_dec_and_test(&vml->mmap_count)) 246 return; 247 guard(mutex)(&arena->lock); 248 /* update link list under lock */ > 249 list_del(&vml->head); 250 vma->vm_private_data = NULL; 251 kfree(vml); 252 } 253 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki