tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git keys-acl head: 06a67e452fb9c5815f6181878949ab31178c6d67 commit: eed986d8643280beed60cf7e7b9599f768706a53 [23/24] keys: Split the search perms between KEY_NEED_USE and KEY_NEED_SEARCH config: i386-randconfig-c001-20210209 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/com... git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git fetch --no-tags dhowells-fs keys-acl git checkout eed986d8643280beed60cf7e7b9599f768706a53 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): fs/crypto/keyring.c: In function 'search_fscrypt_keyring': 145 | keyref = keyring_search(keyref, type, description, false); | ^~~~~~~~~~~~~~ In file included from include/linux/key-type.h:11, from fs/crypto/keyring.c:22: include/linux/key.h:434:18: note: declared here 434 | extern key_ref_t keyring_search(key_ref_t keyring, | ^~~~~~~~~~~~~~ vim +/keyring_search +145 fs/crypto/keyring.c 23c688b54016ee Eric Biggers 2019-08-04 133 23c688b54016ee Eric Biggers 2019-08-04 134 /* Search ->s_master_keys or ->mk_users */ 22d94f493bfb40 Eric Biggers 2019-08-04 135 static struct key *search_fscrypt_keyring(struct key *keyring, 22d94f493bfb40 Eric Biggers 2019-08-04 136 struct key_type *type, 22d94f493bfb40 Eric Biggers 2019-08-04 137 const char *description) 22d94f493bfb40 Eric Biggers 2019-08-04 138 { 22d94f493bfb40 Eric Biggers 2019-08-04 139 /* 22d94f493bfb40 Eric Biggers 2019-08-04 140 * We need to mark the keyring reference as "possessed" so that we 22d94f493bfb40 Eric Biggers 2019-08-04 141 * acquire permission to search it, via the KEY_POS_SEARCH permission. 22d94f493bfb40 Eric Biggers 2019-08-04 142 */ 22d94f493bfb40 Eric Biggers 2019-08-04 143 key_ref_t keyref = make_key_ref(keyring, true /* possessed */); 22d94f493bfb40 Eric Biggers 2019-08-04 144 22d94f493bfb40 Eric Biggers 2019-08-04 @145 keyref = keyring_search(keyref, type, description, false); 22d94f493bfb40 Eric Biggers 2019-08-04 146 if (IS_ERR(keyref)) { 22d94f493bfb40 Eric Biggers 2019-08-04 147 if (PTR_ERR(keyref) == -EAGAIN || /* not found */ 22d94f493bfb40 Eric Biggers 2019-08-04 148 PTR_ERR(keyref) == -EKEYREVOKED) /* recently invalidated */ 22d94f493bfb40 Eric Biggers 2019-08-04 149 keyref = ERR_PTR(-ENOKEY); 22d94f493bfb40 Eric Biggers 2019-08-04 150 return ERR_CAST(keyref); 22d94f493bfb40 Eric Biggers 2019-08-04 151 } 22d94f493bfb40 Eric Biggers 2019-08-04 152 return key_ref_to_ptr(keyref); 22d94f493bfb40 Eric Biggers 2019-08-04 153 } 22d94f493bfb40 Eric Biggers 2019-08-04 154 :::::: The code at line 145 was first introduced by commit :::::: 22d94f493bfb408fdd764f7b1d0363af2122fba5 fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl :::::: TO: Eric Biggers <ebiggers(a)google.com&gt; :::::: CC: Eric Biggers <ebiggers(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org