[jarkko-tpmdd:tpm2key-v8 11/12] crypto/asymmetric_keys/tpm2_key_rsa.c:633:10: warning: variable 'ret' is uninitialized when used here

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git tpm2key-v8
head:   676e39dca229e7ee2b1d90a1e8accda6fdede98f
commit: 70ff943241a1202554120aa67fdb4708c684fed4 [11/12] KEYS: asymmetric: Add tpm2_key_rsa signer
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20241104/202411041402.87goDFKV-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241104/202411041402.87goDFKV-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411041402.87goDFKV-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from crypto/asymmetric_keys/tpm2_key_rsa.c:21:
   In file included from include/keys/trusted-type.h:12:
   In file included from include/linux/tpm.h:24:
   In file included from include/linux/highmem.h:8:
   In file included from include/linux/cacheflush.h:5:
   In file included from arch/x86/include/asm/cacheflush.h:5:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     505 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     512 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     524 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     525 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> crypto/asymmetric_keys/tpm2_key_rsa.c:633:10: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
     633 |                 return ret;
         |                        ^~~
   crypto/asymmetric_keys/tpm2_key_rsa.c:629:9: note: initialize the variable 'ret' to silence this warning
     629 |         int ret;
         |                ^
         |                 = 0
   5 warnings generated.


vim +/ret +633 crypto/asymmetric_keys/tpm2_key_rsa.c

   622	
   623	/*
   624	 * Attempt to parse a data blob for a key as a TPM private key blob.
   625	 */
   626	static int tpm2_key_rsa_preparse(struct key_preparsed_payload *prep)
   627	{
   628		struct tpm2_key *key;
   629		int ret;
   630	
   631		key = tpm2_key_decode(prep->data, prep->datalen);
   632		if (IS_ERR(key))
 > 633			return ret;
   634	
   635		if (key->oid != OID_TPMLoadableKey) {
   636			kfree(key);
   637			return -EBADMSG;
   638		}
   639	
   640		ret = __tpm2_key_rsa_preparse(key);
   641		if (ret < 0) {
   642			kfree(key);
   643			return ret;
   644		}
   645	
   646		prep->payload.data[asym_subtype] = &tpm2_key_rsa_subtype;
   647		prep->payload.data[asym_key_ids] = NULL;
   648		prep->payload.data[asym_crypto] = key;
   649		prep->payload.data[asym_auth] = NULL;
   650		prep->quotalen = 100;
   651	
   652		return 0;
   653	}
   654	

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