tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/fpu head: fbeb78415a1b32f890fa49e4355faa02bb0c0602 commit: 14b0c6c4efcd1654d291d501cca977f3476a5c10 [74/82] x86/fpu: Add sanity checks for XFD config: x86_64-randconfig-s032-20211014 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git/commit/?id... git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git git fetch --no-tags tglx-devel x86/fpu git checkout 14b0c6c4efcd1654d291d501cca977f3476a5c10 # 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 arch/x86/kernel/fpu/ 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 >>) arch/x86/kernel/fpu/xstate.c:1353:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct lockdep_map const *lock @@ got struct lockdep_map [noderef] __rcu * @@ arch/x86/kernel/fpu/xstate.c:1353:9: sparse: expected struct lockdep_map const *lock arch/x86/kernel/fpu/xstate.c:1353:9: sparse: got struct lockdep_map [noderef] __rcu * arch/x86/kernel/fpu/xstate.c:1468:39: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ arch/x86/kernel/fpu/xstate.c:1468:39: sparse: expected struct spinlock [usertype] *lock arch/x86/kernel/fpu/xstate.c:1468:39: sparse: got struct spinlock [noderef] __rcu * arch/x86/kernel/fpu/xstate.c:1471:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ arch/x86/kernel/fpu/xstate.c:1471:41: sparse: expected struct spinlock [usertype] *lock arch/x86/kernel/fpu/xstate.c:1471:41: sparse: got struct spinlock [noderef] __rcu * vim +1314 arch/x86/kernel/fpu/xstate.c 1304 1305 #ifdef CONFIG_X86_DEBUG_FPU 1306 static inline bool xfd_valid(struct fpstate *fpstate, u64 mask, bool rstor) 1307 { 1308 u64 xfd = __this_cpu_read(xfd_state); 1309 1310 if (fpstate->xfd == xfd) 1311 return true; 1312 1313 /* For current's fpstate the XFD state must be correct. */ 1315 return false; 1316 1317 /* 1318 * XRSTOR(S) from init_fpstate are always correct as it will just 1319 * bring all components into init state and not read from the 1320 * buffer. XSAVE(S) raises #PF after init. 1321 */ 1322 if (fpstate == &init_fpstate) 1323 return rstor; 1324 1325 /* 1326 * XSAVE(S): clone(), fpu_swap_kvm_fpu() 1327 * XRSTORS(S): fpu_swap_kvm_fpu() 1328 */ 1329 1330 /* Remove XFD disabled states from the mask. */ 1331 mask &= ~xfd; 1332 /* Remove features which are valid in fpstate. */ 1333 mask &= ~fpstate->xfeatures; 1334 1335 /* 1336 * Mask should be zero now which means no loads/stores 1337 * past the end of the register state buffer. 1338 */ 1339 return !mask; 1340 } 1341 1342 void xfd_validate_state(struct fpstate *fpstate, u64 mask, bool rstor) 1343 { 1344 WARN_ON_ONCE(!xfd_valid(fpstate, mask, rstor)); 1345 } 1346 #endif /* CONFIG_X86_DEBUG_FPU */ 1347 1348 static int validate_sigaltstack(unsigned int usize) 1349 { 1350 struct task_struct *thread, *leader = current->group_leader; 1351 unsigned long framesize = get_sigframe_size(); 1352 1354 1355 /* get_sigframe_size() is based on fpu_user_cfg.max_size */ 1356 framesize -= fpu_user_cfg.max_size; 1357 framesize += usize; 1358 for_each_thread(leader, thread) { 1359 if (thread->sas_ss_size && thread->sas_ss_size < framesize) 1360 return -ENOSPC; 1361 } 1362 return 0; 1363 } 1364 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org