Replace the usage of BUG_ON with WARN_ON and return an error.
Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 20 +++++-
drivers/crypto/ccp/ccp-crypto-main.c | 6 +-
drivers/crypto/ccp/ccp-crypto-sha.c | 13 ++++
drivers/crypto/ccp/ccp-ops.c | 108 +++++++++++++++++++-----------
4 files changed, 105 insertions(+), 42 deletions(-)
diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
index ea7e844..d89f20c 100644
--- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
+++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
@@ -118,10 +118,19 @@ static int ccp_do_cmac_update(struct ahash_request *req, unsigned int nbytes,
if (rctx->buf_count) {
sg_init_one(&rctx->buf_sg, rctx->buf, rctx->buf_count);
sg = ccp_crypto_sg_table_add(&rctx->data_sg, &rctx->buf_sg);
+ if (!sg) {
+ ret = -EINVAL;
+ goto e_free;
+ }
}
- if (nbytes)
+ if (nbytes) {
sg = ccp_crypto_sg_table_add(&rctx->data_sg, req->src);
+ if (!sg) {
+ ret = -EINVAL;
+ goto e_free;
+ }
+ }
if (need_pad) {
int pad_length = block_size - (len & (block_size - 1));
@@ -132,6 +141,10 @@ static int ccp_do_cmac_update(struct ahash_request *req, unsigned int nbytes,
rctx->pad[0] = 0x80;
sg_init_one(&rctx->pad_sg, rctx->pad, pad_length);
sg = ccp_crypto_sg_table_add(&rctx->data_sg, &rctx->pad_sg);
+ if (!sg) {
+ ret = -EINVAL;
+ goto e_free;
+ }
}
if (sg) {
sg_mark_end(sg);
@@ -163,6 +176,11 @@ static int ccp_do_cmac_update(struct ahash_request *req, unsigned int nbytes,
ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
return ret;
+
+e_free:
+ sg_free_table(&rctx->data_sg);
+
+ return ret;
}
static int ccp_aes_cmac_init(struct ahash_request *req)
diff --git a/drivers/crypto/ccp/ccp-crypto-main.c b/drivers/crypto/ccp/ccp-crypto-main.c
index bdec01e..e0380e5 100644
--- a/drivers/crypto/ccp/ccp-crypto-main.c
+++ b/drivers/crypto/ccp/ccp-crypto-main.c
@@ -305,14 +305,16 @@ struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
for (sg = table->sgl; sg; sg = sg_next(sg))
if (!sg_page(sg))
break;
- BUG_ON(!sg);
+ if (WARN_ON(!sg))
+ return NULL;
for (; sg && sg_add; sg = sg_next(sg), sg_add = sg_next(sg_add)) {
sg_set_page(sg, sg_page(sg_add), sg_add->length,
sg_add->offset);
sg_last = sg;
}
- BUG_ON(sg_add);
+ if (WARN_ON(sg_add))
+ return NULL;
return sg_last;
}
diff --git a/drivers/crypto/ccp/ccp-crypto-sha.c b/drivers/crypto/ccp/ccp-crypto-sha.c
index 507b34e..d14b3f2 100644
--- a/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -107,7 +107,15 @@ static int ccp_do_sha_update(struct ahash_request *req, unsigned int nbytes,
sg_init_one(&rctx->buf_sg, rctx->buf, rctx->buf_count);
sg = ccp_crypto_sg_table_add(&rctx->data_sg, &rctx->buf_sg);
+ if (!sg) {
+ ret = -EINVAL;
+ goto e_free;
+ }
sg = ccp_crypto_sg_table_add(&rctx->data_sg, req->src);
+ if (!sg) {
+ ret = -EINVAL;
+ goto e_free;
+ }
sg_mark_end(sg);
sg = rctx->data_sg.sgl;
@@ -142,6 +150,11 @@ static int ccp_do_sha_update(struct ahash_request *req, unsigned int nbytes,
ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
return ret;
+
+e_free:
+ sg_free_table(&rctx->data_sg);
+
+ return ret;
}
static int ccp_sha_init(struct ahash_request *req)
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index d09c6c4..c6e883b 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -611,15 +611,16 @@ static void ccp_get_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset,
1);
}
-static void ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa,
- struct scatterlist *sg,
- unsigned int len, unsigned int se_len,
- bool sign_extend)
+static int ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa,
+ struct scatterlist *sg,
+ unsigned int len, unsigned int se_len,
+ bool sign_extend)
{
unsigned int nbytes, sg_offset, dm_offset, ksb_len, i;
u8 buffer[CCP_REVERSE_BUF_SIZE];
- BUG_ON(se_len > sizeof(buffer));
+ if (WARN_ON(se_len > sizeof(buffer)))
+ return -EINVAL;
sg_offset = len;
dm_offset = 0;
@@ -642,6 +643,8 @@ static void ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa,
se_len - ksb_len);
}
}
+
+ return 0;
}
static void ccp_reverse_get_dm_area(struct ccp_dm_workarea *wa,
@@ -1606,8 +1609,10 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
if (ret)
goto e_ksb;
- ccp_reverse_set_dm_area(&exp, rsa->exp, rsa->exp_len, CCP_KSB_BYTES,
- false);
+ ret = ccp_reverse_set_dm_area(&exp, rsa->exp, rsa->exp_len,
+ CCP_KSB_BYTES, false);
+ if (ret)
+ goto e_exp;
ret = ccp_copy_to_ksb(cmd_q, &exp, op.jobid, op.ksb_key,
CCP_PASSTHRU_BYTESWAP_NOOP);
if (ret) {
@@ -1623,11 +1628,15 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
if (ret)
goto e_exp;
- ccp_reverse_set_dm_area(&src, rsa->mod, rsa->mod_len, CCP_KSB_BYTES,
- false);
+ ret = ccp_reverse_set_dm_area(&src, rsa->mod, rsa->mod_len,
+ CCP_KSB_BYTES, false);
+ if (ret)
+ goto e_src;
src.address += o_len; /* Adjust the address for the copy operation */
- ccp_reverse_set_dm_area(&src, rsa->src, rsa->src_len, CCP_KSB_BYTES,
- false);
+ ret = ccp_reverse_set_dm_area(&src, rsa->src, rsa->src_len,
+ CCP_KSB_BYTES, false);
+ if (ret)
+ goto e_src;
src.address -= o_len; /* Reset the address to original value */
/* Prepare the output area for the operation */
@@ -1841,21 +1850,27 @@ static int ccp_run_ecc_mm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
save = src.address;
/* Copy the ECC modulus */
- ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
/* Copy the first operand */
- ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_1,
- ecc->u.mm.operand_1_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_1,
+ ecc->u.mm.operand_1_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) {
/* Copy the second operand */
- ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_2,
- ecc->u.mm.operand_2_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_2,
+ ecc->u.mm.operand_2_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
}
@@ -1960,18 +1975,24 @@ static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
save = src.address;
/* Copy the ECC modulus */
- ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
/* Copy the first point X and Y coordinate */
- ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.x,
- ecc->u.pm.point_1.x_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.x,
+ ecc->u.pm.point_1.x_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
- ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.y,
- ecc->u.pm.point_1.y_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.y,
+ ecc->u.pm.point_1.y_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
/* Set the first point Z coordianate to 1 */
@@ -1980,13 +2001,17 @@ static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) {
/* Copy the second point X and Y coordinate */
- ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.x,
- ecc->u.pm.point_2.x_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.x,
+ ecc->u.pm.point_2.x_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
- ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.y,
- ecc->u.pm.point_2.y_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.y,
+ ecc->u.pm.point_2.y_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
/* Set the second point Z coordianate to 1 */
@@ -1994,16 +2019,21 @@ static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
src.address += CCP_ECC_OPERAND_SIZE;
} else {
/* Copy the Domain "a" parameter */
- ccp_reverse_set_dm_area(&src, ecc->u.pm.domain_a,
- ecc->u.pm.domain_a_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.domain_a,
+ ecc->u.pm.domain_a_len,
+ CCP_ECC_OPERAND_SIZE, false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) {
/* Copy the scalar value */
- ccp_reverse_set_dm_area(&src, ecc->u.pm.scalar,
- ecc->u.pm.scalar_len,
- CCP_ECC_OPERAND_SIZE, false);
+ ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.scalar,
+ ecc->u.pm.scalar_len,
+ CCP_ECC_OPERAND_SIZE,
+ false);
+ if (ret)
+ goto e_src;
src.address += CCP_ECC_OPERAND_SIZE;
}
}
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