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crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd()

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There are three bugs in this code:

1) If we ccp_init_data() fails for &src then we need to free aad.
   Use goto e_aad instead of goto e_ctx.
2) The label to free the &final_wa was named incorrectly as "e_tag" but
   it should have been "e_final_wa".  One error path leaked &final_wa.
3) The &tag was leaked on one error path.  In that case, I added a free
   before the goto because the resource was local to that block.

Fixes: 36cf515b9b ("crypto: ccp - Enable support for AES GCM on v5 CCPs")
Reported-by: "minihanshen(沈明航)" <minihanshen@tencent.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: John Allen <john.allen@amd.com>
Tested-by: John Allen <john.allen@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dan Carpenter 2021-08-26 16:04:27 +03:00 committed by Herbert Xu
parent 6880fa6c56
commit 505d9dcb0f
1 changed files with 8 additions and 6 deletions
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14
drivers/crypto/ccp/ccp-ops.c
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@ -778,7 +778,7 @@ ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
in_place ? DMA_BIDIRECTIONAL
: DMA_TO_DEVICE);
if (ret)
goto e_ctx;
goto e_aad;
if (in_place) {
dst = src;
@ -863,7 +863,7 @@ ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
op.u.aes.size = 0;
ret = cmd_q->ccp->vdata->perform->aes(&op);
if (ret)
goto e_dst;
goto e_final_wa;
if (aes->action == CCP_AES_ACTION_ENCRYPT) {
/* Put the ciphered tag after the ciphertext. */
@ -873,17 +873,19 @@ ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
ret = ccp_init_dm_workarea(&tag, cmd_q, authsize,
DMA_BIDIRECTIONAL);
if (ret)
goto e_tag;
goto e_final_wa;
ret = ccp_set_dm_area(&tag, 0, p_tag, 0, authsize);
if (ret)
goto e_tag;
if (ret) {
ccp_dm_free(&tag);
goto e_final_wa;
}
ret = crypto_memneq(tag.address, final_wa.address,
authsize) ? -EBADMSG : 0;
ccp_dm_free(&tag);
}
e_tag:
e_final_wa:
ccp_dm_free(&final_wa);
e_dst: