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s390/crypto: Don't panic after crypto instruction failures

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Remove the BUG_ON's that check for failure or incomplete
results of the s390 hardware crypto instructions.
Rather report the errors as -EIO to the crypto layer.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Esse commit está contido em:
Jan Glauber
2012-10-26 15:06:12 +02:00
commit de Martin Schwidefsky
pai ce1d801462
commit 36eb2caa7b
4 arquivos alterados com 39 adições e 21 exclusões
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18
arch/s390/crypto/aes_s390.c
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@@ -325,7 +325,8 @@ static int ecb_aes_crypt(struct blkcipher_desc *desc, long func, void *param,
u8 *in = walk->src.virt.addr;
ret = crypt_s390_km(func, param, out, in, n);
BUG_ON((ret < 0) || (ret != n));
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
@@ -457,7 +458,8 @@ static int cbc_aes_crypt(struct blkcipher_desc *desc, long func, void *param,
u8 *in = walk->src.virt.addr;
ret = crypt_s390_kmc(func, param, out, in, n);
BUG_ON((ret < 0) || (ret != n));
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
@@ -625,7 +627,8 @@ static int xts_aes_crypt(struct blkcipher_desc *desc, long func,
memcpy(xts_ctx->pcc.tweak, walk->iv, sizeof(xts_ctx->pcc.tweak));
param = xts_ctx->pcc.key + offset;
ret = crypt_s390_pcc(func, param);
BUG_ON(ret < 0);
if (ret < 0)
return -EIO;
memcpy(xts_ctx->xts_param, xts_ctx->pcc.xts, 16);
param = xts_ctx->key + offset;
@@ -636,7 +639,8 @@ static int xts_aes_crypt(struct blkcipher_desc *desc, long func,
in = walk->src.virt.addr;
ret = crypt_s390_km(func, param, out, in, n);
BUG_ON(ret < 0 || ret != n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
@@ -769,7 +773,8 @@ static int ctr_aes_crypt(struct blkcipher_desc *desc, long func,
crypto_inc(ctrblk + i, AES_BLOCK_SIZE);
}
ret = crypt_s390_kmctr(func, sctx->key, out, in, n, ctrblk);
BUG_ON(ret < 0 || ret != n);
if (ret < 0 || ret != n)
return -EIO;
if (n > AES_BLOCK_SIZE)
memcpy(ctrblk, ctrblk + n - AES_BLOCK_SIZE,
AES_BLOCK_SIZE);
@@ -788,7 +793,8 @@ static int ctr_aes_crypt(struct blkcipher_desc *desc, long func,
in = walk->src.virt.addr;
ret = crypt_s390_kmctr(func, sctx->key, buf, in,
AES_BLOCK_SIZE, ctrblk);
BUG_ON(ret < 0 || ret != AES_BLOCK_SIZE);
if (ret < 0 || ret != AES_BLOCK_SIZE)
return -EIO;
memcpy(out, buf, nbytes);
crypto_inc(ctrblk, AES_BLOCK_SIZE);
ret = blkcipher_walk_done(desc, walk, 0);