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crypto: drbg - report backend_cra_name when allocation fails 

Be more verbose and also report ->backend_cra_name when
crypto_alloc_shash() or crypto_alloc_cipher() fail in
drbg_init_hash_kernel() or drbg_init_sym_kernel()
correspondingly.

Example
 DRBG: could not allocate digest TFM handle: hmac(sha256)

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Sergey Senozhatsky 2015-06-10 22:27:48 +09:00 committed by Herbert Xu
parent 42ea507fae
commit 593dfbd9ca
1 changed files with 4 additions and 2 deletions
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6
crypto/drbg.c
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@ -1635,7 +1635,8 @@ static int drbg_init_hash_kernel(struct drbg_state *drbg)
tfm = crypto_alloc_shash(drbg->core->backend_cra_name, 0, 0);
if (IS_ERR(tfm)) {
pr_info("DRBG: could not allocate digest TFM handle\n");
pr_info("DRBG: could not allocate digest TFM handle: %s\n",
drbg->core->backend_cra_name);
return PTR_ERR(tfm);
}
BUG_ON(drbg_blocklen(drbg) != crypto_shash_digestsize(tfm));
@ -1686,7 +1687,8 @@ static int drbg_init_sym_kernel(struct drbg_state *drbg)
tfm = crypto_alloc_cipher(drbg->core->backend_cra_name, 0, 0);
if (IS_ERR(tfm)) {
pr_info("DRBG: could not allocate cipher TFM handle\n");
pr_info("DRBG: could not allocate cipher TFM handle: %s\n",
drbg->core->backend_cra_name);
return PTR_ERR(tfm);
}
BUG_ON(drbg_blocklen(drbg) != crypto_cipher_blocksize(tfm));