tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 7efcac7603953bb58d80041f410b079378b5174c commit: 725ee753b5064f03287858bc346d883b8f39319a [13023/21625] bdi: fix use-after-free for the bdi device config: arm64-randconfig-r123-20240125 (https://download.01.org/0day-ci/archive/20240209/202402090649.euI3JhvL-lkp@i...) compiler: aarch64-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20240209/202402090649.euI3JhvL-lkp@i...)

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 lkp@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202402090649.euI3JhvL-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)

...

block/blk-cgroup.c:478:19: sparse: sparse: incompatible types in comparison expression (different address spaces):

block/blk-cgroup.c:478:19: sparse: struct rcu_device [noderef] __rcu * block/blk-cgroup.c:478:19: sparse: struct rcu_device * block/blk-cgroup.c:816:5: sparse: sparse: context imbalance in 'blkg_conf_prep' - wrong count at exit block/blk-cgroup.c:1794: warning: Function parameter or member 'q' not described in 'blkcg_schedule_throttle' block/blk-cgroup.c:1794: warning: Function parameter or member 'use_memdelay' not described in 'blkcg_schedule_throttle' block/blk-cgroup.c:1819: warning: Function parameter or member 'blkg' not described in 'blkcg_add_delay' block/blk-cgroup.c:1819: warning: Function parameter or member 'now' not described in 'blkcg_add_delay' block/blk-cgroup.c:1819: warning: Function parameter or member 'delta' not described in 'blkcg_add_delay'

vim +478 block/blk-cgroup.c

472 473 const char *blkg_dev_name(struct blkcg_gq *blkg) 474 { 475 /* some drivers (floppy) instantiate a queue w/o disk registered */ 476 struct rcu_device *rcu_dev; 477

478 rcu_dev = rcu_dereference(blkg->q->backing_dev_info->rcu_dev);

479 if (rcu_dev) 480 return dev_name(&rcu_dev->dev); 481 return NULL; 482 } 483 EXPORT_SYMBOL_GPL(blkg_dev_name); 484