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Subject[PATCH] crypto/drbg: report backend_cra_name when allocation fails
Date
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>
---
crypto/drbg.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/crypto/drbg.c b/crypto/drbg.c
index 04836b4..d42f678 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1590,7 +1590,8 @@ 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));
@@ -1641,7 +1642,8 @@ 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));
--
2.4.3.368.g7974889


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