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Merge pull request #6047 from SparkiDev/refinc_ret_check

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Ref counting: rework for static analysers
This commit is contained in:
David Garske
2023-02-02 18:46:34 -08:00
committed by GitHub
parent 8ecf6f3381 f6da3a26ac
commit ef266d7e0b
8 changed files with 103 additions and 17 deletions
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21
src/bio.c
View File

@ -768,9 +768,13 @@ int wolfSSL_BIO_up_ref(WOLFSSL_BIO* bio)
if (bio) {
int ret;
wolfSSL_RefInc(&bio->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Failed to lock BIO mutex");
}
#else
(void)ret;
#endif
return WOLFSSL_SUCCESS;
}
@ -2494,11 +2498,15 @@ int wolfSSL_BIO_flush(WOLFSSL_BIO* bio)
{
int ret;
wolfSSL_RefInit(&bio->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
wolfSSL_BIO_free(bio);
WOLFSSL_MSG("wc_InitMutex failed for WOLFSSL_BIO");
return NULL;
}
#else
(void)ret;
#endif
}
#endif
@ -2563,17 +2571,22 @@ int wolfSSL_BIO_flush(WOLFSSL_BIO* bio)
}
}
#if defined(OPENSSL_ALL) || defined(OPENSSL_EXTRA)
#if defined(OPENSSL_ALL) || defined(OPENSSL_EXTRA)
wolfSSL_RefDec(&bio->ref, &doFree, &ret);
if (!doFree) {
/* return success if BIO ref count is not 1 yet */
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
return (ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE ;
#else
(void)ret;
return WOLFSSL_SUCCESS;
}
#ifndef SINGLE_THREADED
wolfSSL_RefFree(&bio->ref);
#endif
}
#ifndef SINGLE_THREADED
wolfSSL_RefFree(&bio->ref);
#endif
#endif
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
wolfSSL_CRYPTO_cleanup_ex_data(&bio->ex_data);

12
src/internal.c
View File

@ -2155,12 +2155,16 @@ int InitSSL_Ctx(WOLFSSL_CTX* ctx, WOLFSSL_METHOD* method, void* heap)
}
wolfSSL_RefInit(&ctx->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret < 0) {
WOLFSSL_MSG("Mutex error on CTX init");
ctx->err = CTX_INIT_MUTEX_E;
WOLFSSL_ERROR_VERBOSE(BAD_MUTEX_E);
return BAD_MUTEX_E;
}
#else
(void)ret;
#endif
#ifndef NO_CERTS
ctx->privateKeyDevId = INVALID_DEVID;
@ -2621,6 +2625,7 @@ void FreeSSL_Ctx(WOLFSSL_CTX* ctx)
/* decrement CTX reference count */
wolfSSL_RefDec(&ctx->ref, &isZero, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret < 0) {
/* check error state, if mutex error code then mutex init failed but
* CTX was still malloc'd */
@ -2633,6 +2638,9 @@ void FreeSSL_Ctx(WOLFSSL_CTX* ctx)
}
return;
}
#else
(void)ret;
#endif
if (isZero) {
WOLFSSL_MSG("CTX ref count down to 0, doing full free");
@ -6188,9 +6196,13 @@ int SetSSL_CTX(WOLFSSL* ssl, WOLFSSL_CTX* ctx, int writeDup)
/* increment CTX reference count */
wolfSSL_RefInc(&ctx->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret < 0) {
return ret;
}
#else
(void)ret;
#endif
ret = WOLFSSL_SUCCESS; /* set default ret */
ssl->ctx = ctx; /* only for passing to calls, options could change */

23
src/pk.c
View File

@ -940,19 +940,13 @@ void wolfSSL_RSA_free(WOLFSSL_RSA* rsa)
doFree = 0;
}
if (doFree) {
int isZero;
int err;
/* Decrement reference count. */
wolfSSL_RefDec(&rsa->ref, &isZero, &err);
if (err == 0) {
/* Continue if reference count is zero. */
doFree = isZero;
}
else {
/* Didn't reference decrement so can't free. */
doFree = 0;
}
wolfSSL_RefDec(&rsa->ref, &doFree, &err);
#ifndef WOLFSSL_REFCNT_ERROR_RETURN
(void)err;
#endif
}
if (doFree) {
void* heap = rsa->heap;
@ -1052,8 +1046,10 @@ WOLFSSL_RSA* wolfSSL_RSA_new_ex(void* heap, int devId)
/* Initialize reference counting. */
wolfSSL_RefInit(&rsa->ref, &err);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
}
if (!err) {
#endif
/* Initialize wolfCrypt RSA key. */
if (wc_InitRsaKey_ex(key, heap, devId) != 0) {
WOLFSSL_ERROR_MSG("InitRsaKey WOLFSSL_RSA failure");
@ -6229,8 +6225,10 @@ WOLFSSL_DH* wolfSSL_DH_new(void)
XMEMSET(dh, 0, sizeof(WOLFSSL_DH));
/* Initialize reference counting. */
wolfSSL_RefInit(&dh->ref, &err);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
}
if (!err) {
#endif
/* Allocate wolfSSL DH key. */
key = (DhKey*)XMALLOC(sizeof(DhKey), NULL, DYNAMIC_TYPE_DH);
if (key == NULL) {
@ -11127,9 +11125,10 @@ WOLFSSL_EC_KEY *wolfSSL_EC_KEY_new_ex(void* heap, int devId)
/* Initialize reference count. */
wolfSSL_RefInit(&key->ref, &err);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
}
if (!err) {
#endif
/* Allocate memory for internal EC key representation. */
key->internal = (ecc_key*)XMALLOC(sizeof(ecc_key), heap,
DYNAMIC_TYPE_ECC);
@ -11243,7 +11242,7 @@ void wolfSSL_EC_KEY_free(WOLFSSL_EC_KEY *key)
/* Decrement reference count. */
wolfSSL_RefDec(&key->ref, &doFree, &err);
if ((!err) && doFree) {
if (doFree) {
/* Dispose of allocated reference counting data. */
wolfSSL_RefFree(&key->ref);

29
src/ssl.c
View File

@ -1297,7 +1297,12 @@ int wolfSSL_CTX_up_ref(WOLFSSL_CTX* ctx)
{
int ret;
wolfSSL_RefInc(&ctx->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
return ((ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE);
#else
(void)ret;
return WOLFSSL_SUCCESS;
#endif
}
WOLFSSL_ABI
@ -4983,11 +4988,15 @@ WOLFSSL_CERT_MANAGER* wolfSSL_CertManagerNew_ex(void* heap)
}
wolfSSL_RefInit(&cm->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Bad mutex init");
wolfSSL_CertManagerFree(cm);
return NULL;
}
#else
(void)ret;
#endif
#ifdef WOLFSSL_TRUST_PEER_CERT
if (wc_InitMutex(&cm->tpLock) != 0) {
@ -5034,9 +5043,13 @@ void wolfSSL_CertManagerFree(WOLFSSL_CERT_MANAGER* cm)
if (cm) {
wolfSSL_RefDec(&cm->ref, &doFree, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Couldn't lock cm mutex");
}
#else
(void)ret;
#endif
if (doFree) {
#ifdef HAVE_CRL
if (cm->crl)
@ -5073,10 +5086,14 @@ int wolfSSL_CertManager_up_ref(WOLFSSL_CERT_MANAGER* cm)
int ret;
wolfSSL_RefInc(&cm->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Failed to lock cm mutex");
return WOLFSSL_FAILURE;
}
#else
(void)ret;
#endif
return WOLFSSL_SUCCESS;
}
@ -21063,11 +21080,15 @@ WOLFSSL_SESSION* wolfSSL_NewSession(void* heap)
int err;
XMEMSET(ret, 0, sizeof(WOLFSSL_SESSION));
wolfSSL_RefInit(&ret->ref, &err);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (err != 0) {
WOLFSSL_MSG("Error setting up session reference mutex");
XFREE(ret, ret->heap, DYNAMIC_TYPE_SESSION);
return NULL;
}
#else
(void)err;
#endif
#ifndef NO_SESSION_CACHE
ret->cacheRow = INVALID_SESSION_ROW; /* not in cache */
#endif
@ -21125,10 +21146,14 @@ int wolfSSL_SESSION_up_ref(WOLFSSL_SESSION* session)
return WOLFSSL_FAILURE;
wolfSSL_RefInc(&session->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Failed to lock session mutex");
return WOLFSSL_FAILURE;
}
#else
(void)ret;
#endif
return WOLFSSL_SUCCESS;
}
@ -32534,11 +32559,15 @@ WOLFSSL_CTX* wolfSSL_set_SSL_CTX(WOLFSSL* ssl, WOLFSSL_CTX* ctx)
return ssl->ctx;
wolfSSL_RefInc(&ctx->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
/* can only fail on serious stuff, like mutex not working
* or ctx refcount out of whack. */
return NULL;
}
#else
(void)ret;
#endif
if (ssl->ctx) {
wolfSSL_CTX_free(ssl->ctx);
}

12
src/x509_str.c
View File

@ -725,8 +725,12 @@ WOLFSSL_X509_STORE* wolfSSL_X509_STORE_new(void)
store->isDynamic = 1;
wolfSSL_RefInit(&store->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0)
goto err_exit;
#else
(void)ret;
#endif
if ((store->cm = wolfSSL_CertManagerNew()) == NULL)
goto err_exit;
@ -775,9 +779,13 @@ void wolfSSL_X509_STORE_free(WOLFSSL_X509_STORE* store)
if (store != NULL && store->isDynamic) {
int ret;
wolfSSL_RefDec(&store->ref, &doFree, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Couldn't lock store mutex");
}
#else
(void)ret;
#endif
if (doFree) {
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
@ -839,10 +847,14 @@ int wolfSSL_X509_STORE_up_ref(WOLFSSL_X509_STORE* store)
if (store) {
int ret;
wolfSSL_RefInc(&store->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Failed to lock store mutex");
return WOLFSSL_FAILURE;
}
#else
(void)ret;
#endif
return WOLFSSL_SUCCESS;
}

13
wolfcrypt/src/evp.c
View File

@ -9386,9 +9386,13 @@ int wolfSSL_EVP_PKEY_up_ref(WOLFSSL_EVP_PKEY* pkey)
if (pkey) {
int ret;
wolfSSL_RefInc(&pkey->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Failed to lock pkey mutex");
}
#else
(void)ret;
#endif
return WOLFSSL_SUCCESS;
}
@ -9498,12 +9502,15 @@ WOLFSSL_EVP_PKEY* wolfSSL_EVP_PKEY_new_ex(void* heap)
}
wolfSSL_RefInit(&pkey->ref, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0){
wolfSSL_EVP_PKEY_free(pkey);
WOLFSSL_MSG("Issue initializing mutex");
return NULL;
}
#else
(void)ret;
#endif
}
else {
WOLFSSL_MSG("memory failure");
@ -9519,9 +9526,13 @@ void wolfSSL_EVP_PKEY_free(WOLFSSL_EVP_PKEY* key)
if (key != NULL) {
int ret;
wolfSSL_RefDec(&key->ref, &doFree, &ret);
#ifdef WOLFSSL_REFCNT_ERROR_RETURN
if (ret != 0) {
WOLFSSL_MSG("Couldn't lock pkey mutex");
}
#else
(void)ret;
#endif
if (doFree) {
wc_FreeRng(&key->rng);

2
wolfcrypt/src/wc_port.c
View File

@ -1098,6 +1098,8 @@ void wolfSSL_RefDec(wolfSSL_Ref* ref, int* isZero, int* err)
int ret = wc_LockMutex(&ref->mutex);
if (ret != 0) {
WOLFSSL_MSG("Failed to lock mutex for reference decrement!");
/* Can't say count is zero. */
*isZero = 0;
}
else {
if (ref->count > 0) {

8
wolfssl/wolfcrypt/wc_port.h
View File

@ -295,6 +295,7 @@ typedef struct wolfSSL_Ref {
} wolfSSL_Ref;
#ifdef SINGLE_THREADED
#define wolfSSL_RefInit(ref, err) \
do { \
(ref)->count = 1; \
@ -312,7 +313,9 @@ typedef struct wolfSSL_Ref {
*(isZero) = ((ref)->count == 0); \
*(err) = 0; \
} while(0)
#elif defined(HAVE_C___ATOMIC)
#define wolfSSL_RefInit(ref, err) \
do { \
(ref)->count = 1; \
@ -332,11 +335,16 @@ typedef struct wolfSSL_Ref {
*(isZero) = ((ref)->count == 0); \
*(err) = 0; \
} while(0)
#else
#define WOLFSSL_REFCNT_ERROR_RETURN
WOLFSSL_LOCAL void wolfSSL_RefInit(wolfSSL_Ref* ref, int* err);
WOLFSSL_LOCAL void wolfSSL_RefFree(wolfSSL_Ref* ref);
WOLFSSL_LOCAL void wolfSSL_RefInc(wolfSSL_Ref* ref, int* err);
WOLFSSL_LOCAL void wolfSSL_RefDec(wolfSSL_Ref* ref, int* isZero, int* err);
#endif