[kbuild-all] [dhowells-fs:rxrpc-rxgk 15/18] net/rxrpc/server_key.c:82 rxrpc_preparse_s() warn: unsigned 'sec' is never less than zero.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git rxrpc-rxgk head: 7f002a9b47c3c704b8ccdd1e900b04cd10a44285 commit: 6b9115ba99232a4775b3572048f8462aad710d22 [15/18] rxrpc: Hand server key parsing off to the security class config: i386-randconfig-m021-20200920 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; New smatch warnings: net/rxrpc/server_key.c:82 rxrpc_preparse_s() warn: unsigned 'sec' is never less than zero. Old smatch warnings: net/rxrpc/server_key.c:126 rxrpc_server_keyring() warn: passing a valid pointer to 'PTR_ERR' # 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 rxrpc-rxgk git checkout 6b9115ba99232a4775b3572048f8462aad710d22 vim +/sec +82 net/rxrpc/server_key.c 63 64 /* 65 * Preparse a server secret key. 66 */ 67 static int rxrpc_preparse_s(struct key_preparsed_payload *prep) 68 { 69 const struct rxrpc_security *sec; 70 unsigned int service, sec_class; 71 int n; 72 73 _enter("%zu", prep->datalen); 74 75 if (!prep->orig_description) 76 return -EINVAL; 77 78 if (sscanf(prep->orig_description, "%u:%u%n", &service, &sec_class, &n) != 2) 79 return -EINVAL; 80 81 sec = rxrpc_security_lookup(sec_class); 83 return -ENOPKG; 84 85 prep->payload.data[1] = (struct rxrpc_security *)sec; 86 87 return sec->preparse_server_key(prep); 88 } 89 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org