tree: https://android.googlesource.com/kernel/common android-5.4 head: 20810a2469745210a7b2b8e0f9f3b60a28305f43 commit: 20810a2469745210a7b2b8e0f9f3b60a28305f43 [1/1] UPSTREAM: selinux: sidtab reverse lookup hash table config: x86_64-randconfig-a013-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 2c6448cdc2f68f8c28fd0bd9404182b81306e6e6) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-5.4 git checkout 20810a2469745210a7b2b8e0f9f3b60a28305f43 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): struct sidtab *sidtab; ^ security/selinux/ss/services.c:2405:17: warning: variable 'sidtab' set but not used [-Wunused-but-set-variable] struct sidtab *sidtab; ^ security/selinux/ss/services.c:2450:17: warning: variable 'sidtab' set but not used [-Wunused-but-set-variable] struct sidtab *sidtab; ^ security/selinux/ss/services.c:2801:17: warning: variable 'sidtab' set but not used [-Wunused-but-set-variable] struct sidtab *sidtab; ^ 4 warnings generated. vim +/sidtab +2316 security/selinux/ss/services.c cee74f47a6baba Eric Paris 2010-10-13 2305 ^1da177e4c3f41 Linus Torvalds 2005-04-16 2306 /** ^1da177e4c3f41 Linus Torvalds 2005-04-16 2307 * security_port_sid - Obtain the SID for a port. ^1da177e4c3f41 Linus Torvalds 2005-04-16 2308 * @protocol: protocol number ^1da177e4c3f41 Linus Torvalds 2005-04-16 2309 * @port: port number ^1da177e4c3f41 Linus Torvalds 2005-04-16 2310 * @out_sid: security identifier ^1da177e4c3f41 Linus Torvalds 2005-04-16 2311 */ aa8e712cee93d5 Stephen Smalley 2018-03-01 2312 int security_port_sid(struct selinux_state *state, aa8e712cee93d5 Stephen Smalley 2018-03-01 2313 u8 protocol, u16 port, u32 *out_sid) ^1da177e4c3f41 Linus Torvalds 2005-04-16 2314 { aa8e712cee93d5 Stephen Smalley 2018-03-01 2315 struct policydb *policydb; aa8e712cee93d5 Stephen Smalley 2018-03-01 @2316 struct sidtab *sidtab; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2317 struct ocontext *c; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2318 int rc = 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2319 aa8e712cee93d5 Stephen Smalley 2018-03-01 2320 read_lock(&state->ss->policy_rwlock); ^1da177e4c3f41 Linus Torvalds 2005-04-16 2321 aa8e712cee93d5 Stephen Smalley 2018-03-01 2322 policydb = &state->ss->policydb; 24ed7fdae669fe Ondrej Mosnacek 2018-11-30 2323 sidtab = state->ss->sidtab; aa8e712cee93d5 Stephen Smalley 2018-03-01 2324 aa8e712cee93d5 Stephen Smalley 2018-03-01 2325 c = policydb->ocontexts[OCON_PORT]; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2326 while (c) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 2327 if (c->u.port.protocol == protocol && ^1da177e4c3f41 Linus Torvalds 2005-04-16 2328 c->u.port.low_port <= port && ^1da177e4c3f41 Linus Torvalds 2005-04-16 2329 c->u.port.high_port >= port) ^1da177e4c3f41 Linus Torvalds 2005-04-16 2330 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2331 c = c->next; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2332 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 2333 ^1da177e4c3f41 Linus Torvalds 2005-04-16 2334 if (c) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 2335 if (!c->sid[0]) { 20810a24697452 Jeff Vander Stoep 2019-11-22 2336 rc = context_struct_to_sid(state, &c->context[0], ^1da177e4c3f41 Linus Torvalds 2005-04-16 2337 &c->sid[0]); ^1da177e4c3f41 Linus Torvalds 2005-04-16 2338 if (rc) ^1da177e4c3f41 Linus Torvalds 2005-04-16 2339 goto out; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2340 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 2341 *out_sid = c->sid[0]; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2342 } else { ^1da177e4c3f41 Linus Torvalds 2005-04-16 2343 *out_sid = SECINITSID_PORT; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2344 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 2345 ^1da177e4c3f41 Linus Torvalds 2005-04-16 2346 out: aa8e712cee93d5 Stephen Smalley 2018-03-01 2347 read_unlock(&state->ss->policy_rwlock); ^1da177e4c3f41 Linus Torvalds 2005-04-16 2348 return rc; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2349 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 2350 :::::: The code at line 2316 was first introduced by commit :::::: aa8e712cee93d520e96a2ca8e3a20f807c937e3f selinux: wrap global selinux state :::::: TO: Stephen Smalley <sds(a)tycho.nsa.gov&gt; :::::: CC: Paul Moore <paul(a)paul-moore.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org