tree: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git working-selinuxns head: 7bde0cc97700a0abfbfa0ef5f00f9abb0ec0073c commit: e9711bb4912b792b6ec307932cd08329d4a973ff [7/12] selinux: dynamically allocate selinux namespace config: x86_64-randconfig-s021-20201116 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-107-gaf3512a6-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git/commi... git remote add pcmoore-selinux https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git git fetch --no-tags pcmoore-selinux working-selinuxns git checkout e9711bb4912b792b6ec307932cd08329d4a973ff # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 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 >>)" security/selinux/hooks.c:215:30: sparse: sparse: cast removes address space '__rcu' of expression security/selinux/hooks.c:2541:39: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ security/selinux/hooks.c:2541:39: sparse: expected struct spinlock [usertype] *lock security/selinux/hooks.c:2541:39: sparse: got struct spinlock [noderef] __rcu * security/selinux/hooks.c:2549:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ security/selinux/hooks.c:2549:41: sparse: expected struct spinlock [usertype] *lock security/selinux/hooks.c:2549:41: sparse: got struct spinlock [noderef] __rcu * security/selinux/hooks.c:2555:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *parent @@ got struct task_struct [noderef] __rcu *real_parent @@ security/selinux/hooks.c:2555:42: sparse: expected struct task_struct *parent security/selinux/hooks.c:2555:42: sparse: got struct task_struct [noderef] __rcu *real_parent security/selinux/hooks.c:5315:22: sparse: sparse: restricted __be16 degrades to integer security/selinux/hooks.c:5316:22: sparse: sparse: restricted __be16 degrades to integer >> security/selinux/hooks.c:7275:42: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct selinux_policy *policy @@ got struct selinux_policy [noderef] __rcu *policy @@ >> security/selinux/hooks.c:7275:42: sparse: expected struct selinux_policy *policy >> security/selinux/hooks.c:7275:42: sparse: got struct selinux_policy [noderef] __rcu *policy vim +7275 security/selinux/hooks.c 7265 7266 static void selinux_state_free(struct work_struct *work) 7267 { 7268 struct selinux_state *parent, *state = 7269 container_of(work, struct selinux_state, work); 7270 7271 do { 7272 parent = state->parent; 7273 if (state->status_page) 7274 __free_page(state->status_page); > 7275 selinux_policy_free(state->policy); 7276 selinux_avc_free(state->avc); 7277 kfree(state); 7278 state = parent; 7279 } while (state && refcount_dec_and_test(&state->count)); 7280 } 7281