Hi Luiz, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on bluetooth-next/master] [also build test WARNING on linus/master v5.14-rc2] [cannot apply to bluetooth/master next-20210716] [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/Luiz-Augusto-von-Dentz/Bluetooth... base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master config: x86_64-randconfig-s021-20210718 (attached as .config) compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/a02b154e687ba3e82afdd263f84570b1c... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Luiz-Augusto-von-Dentz/Bluetooth-hci_sock-Fix-calling-lock_sock-when-handling-HCI_DEV_UNREG/20210718-112013 git checkout a02b154e687ba3e82afdd263f84570b1ca185a8a # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) net/bluetooth/hci_conn.c:1709:40: sparse: expected char [noderef] __user *ptr net/bluetooth/hci_conn.c:1709:40: sparse: got char * vim +/__user +1709 net/bluetooth/hci_conn.c 1703 1704 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg, 1705 struct hci_conn_info_req *req) 1706 { 1707 struct hci_conn_info ci; 1708 struct hci_conn *conn; 1710 1711 hci_dev_lock(hdev); 1712 conn = hci_conn_hash_lookup_ba(hdev, req->type, &req->bdaddr); 1713 if (conn) { 1714 bacpy(&ci.bdaddr, &conn->dst); 1715 ci.handle = conn->handle; 1716 ci.type = conn->type; 1717 ci.out = conn->out; 1718 ci.state = conn->state; 1719 ci.link_mode = get_link_mode(conn); 1720 } 1721 hci_dev_unlock(hdev); 1722 1723 if (!conn) 1724 return -ENOENT; 1725 1726 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; 1727 } 1728 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org