Hi Wang, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.6-rc3 next-20230926] [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/Wang-Jinchao/padata-Fix-the-UAF-issue-related-to-parallel_data/20230925-153852 base: linus/master patch link: https://lore.kernel.org/r/ZRE4XvOOhz4HSOgR%40fedora patch subject: [PATCH] padata: Fix the UAF issue related to parallel_data config: i386-randconfig-062-20230925 (https://download.01.org/0day-ci/archive/20230927/202309270829.xHgTOMKw-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230927/202309270829.xHgTOMKw-lkp@xxxxxxxxx/reproduce) 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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202309270829.xHgTOMKw-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> kernel/padata.c:1110:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct refcount_struct [usertype] *r @@ got struct refcount_struct [noderef] __rcu * @@ kernel/padata.c:1110:38: sparse: expected struct refcount_struct [usertype] *r kernel/padata.c:1110:38: sparse: got struct refcount_struct [noderef] __rcu * vim +1110 kernel/padata.c 1097 1098 /** 1099 * padata_free_shell - free a padata shell 1100 * 1101 * @ps: padata shell to free 1102 */ 1103 void padata_free_shell(struct padata_shell *ps) 1104 { 1105 if (!ps) 1106 return; 1107 1108 mutex_lock(&ps->pinst->lock); 1109 list_del(&ps->list); > 1110 if (refcount_dec_and_test(&ps->pd->refcnt)) 1111 padata_free_pd(rcu_dereference_protected(ps->pd, 1)); 1112 mutex_unlock(&ps->pinst->lock); 1113 1114 kfree(ps); 1115 } 1116 EXPORT_SYMBOL(padata_free_shell); 1117 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
