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| author | Doug Hogan <[email protected]> | 2019-01-04 00:24:10 -0800 |
|---|---|---|
| committer | Doug Hogan <[email protected]> | 2019-01-08 01:11:58 -0800 |
| commit | a8382439ac61e942bd36c228e533864814f53666 (patch) | |
| tree | 16d8129a0fee46df774d2c461928eab0d3a12c39 /lib/crypto/c_src/crypto_callback.c | |
| parent | c1c98585b05f82a41d81aa24b20936be931a7082 (diff) | |
| download | otp-a8382439ac61e942bd36c228e533864814f53666.tar.gz otp-a8382439ac61e942bd36c228e533864814f53666.tar.bz2 otp-a8382439ac61e942bd36c228e533864814f53666.zip | |
Revamp get_crypto_callbacks()
* Add sanity overflow check
Diffstat (limited to 'lib/crypto/c_src/crypto_callback.c')
| -rw-r--r-- | lib/crypto/c_src/crypto_callback.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/lib/crypto/c_src/crypto_callback.c b/lib/crypto/c_src/crypto_callback.c index dda8b32deb..ed5a1a6226 100644 --- a/lib/crypto/c_src/crypto_callback.c +++ b/lib/crypto/c_src/crypto_callback.c @@ -171,19 +171,26 @@ DLLEXPORT struct crypto_callbacks* get_crypto_callbacks(int nlocks) #ifdef OPENSSL_THREADS if (nlocks > 0) { int i; - lock_vec = enif_alloc(nlocks*sizeof(*lock_vec)); - if (lock_vec==NULL) return NULL; - memset(lock_vec, 0, nlocks*sizeof(*lock_vec)); - + + if ((size_t)nlocks > SIZE_MAX / sizeof(*lock_vec)) + goto err; + if ((lock_vec = enif_alloc((size_t)nlocks * sizeof(*lock_vec))) == NULL) + goto err; + + memset(lock_vec, 0, (size_t)nlocks * sizeof(*lock_vec)); + for (i=nlocks-1; i>=0; --i) { - lock_vec[i] = enif_rwlock_create("crypto_stat"); - if (lock_vec[i]==NULL) return NULL; + if ((lock_vec[i] = enif_rwlock_create("crypto_stat")) == NULL) + goto err; } } #endif is_initialized = 1; } return &the_struct; + + err: + return NULL; } #ifdef HAVE_DYNAMIC_CRYPTO_LIB |