From: Dan Carpenter <dan.carpenter@oracle.com> mainline inclusion from mainline-v5.16 commit 505d9dcb0f7ddf9d075e729523a33d38642ae680 category: bugfix bugzilla: NA CVE: CVE-2021-3764, CVE-2021-3744 --------------------------- 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: 36cf515b9bbe ("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> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: weiyang wang <wangweiyang2@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/crypto/ccp/ccp-ops.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c index 4dca1c7b9d47b..cdffff7c8abb9 100644 --- a/drivers/crypto/ccp/ccp-ops.c +++ b/drivers/crypto/ccp/ccp-ops.c @@ -768,7 +768,7 @@ static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); if (ret) - goto e_ctx; + goto e_aad; if (in_place) { dst = src; @@ -853,7 +853,7 @@ static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, 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. */ @@ -863,17 +863,19 @@ static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, 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: -- 2.25.1