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84 lines
2.8 KiB
Diff
84 lines
2.8 KiB
Diff
From be632ce97422dfe533944186e2f4420b87b87ad5 Mon Sep 17 00:00:00 2001
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From: Oleg Matcovschi <omatcovschi@google.com>
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Date: Wed, 9 Aug 2017 23:18:19 -0700
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Subject: [PATCH] crypto: msm: Fix several race condition issues in crypto
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drivers
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Check areq before referencing, replace xchg to automic_xchg and
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verify return values of set key during SHA operations.
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Bug: 37284397
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Signed-off-by: Brahmaji K <bkomma@codeaurora.org>
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Signed-off-by: Paresh Purabhiya <ppurab@codeaurora.org>
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Change-Id: I98a9541a1d3a8c8d5e974348c76b92da1d5102e6
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---
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drivers/crypto/msm/qce50.c | 4 ++++
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drivers/crypto/msm/qcrypto.c | 14 ++++++++++----
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2 files changed, 14 insertions(+), 4 deletions(-)
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diff --git a/drivers/crypto/msm/qce50.c b/drivers/crypto/msm/qce50.c
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index 0e017b3c0c3ff..6bd9d56b13566 100644
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--- a/drivers/crypto/msm/qce50.c
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+++ b/drivers/crypto/msm/qce50.c
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@@ -2055,6 +2055,10 @@ static int _sha_complete(struct qce_device *pce_dev)
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uint32_t status;
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areq = (struct ahash_request *) pce_dev->areq;
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+ if (!areq) {
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+ pr_err("sha operation error. areq is NULL\n");
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+ return -ENXIO;
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+ }
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qce_dma_unmap_sg(pce_dev->pdev, areq->src, pce_dev->src_nents,
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DMA_TO_DEVICE);
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memcpy(digest, (char *)(&pce_dev->ce_sps.result->auth_iv[0]),
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diff --git a/drivers/crypto/msm/qcrypto.c b/drivers/crypto/msm/qcrypto.c
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index 04b28a58e38bd..e64d1dd51cb5f 100644
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--- a/drivers/crypto/msm/qcrypto.c
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+++ b/drivers/crypto/msm/qcrypto.c
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@@ -3514,6 +3514,7 @@ static int _sha1_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
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unsigned int len)
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{
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struct qcrypto_sha_ctx *sha_ctx = crypto_tfm_ctx(&tfm->base);
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+ int ret = 0;
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memset(&sha_ctx->authkey[0], 0, SHA1_BLOCK_SIZE);
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if (len <= SHA1_BLOCK_SIZE) {
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memcpy(&sha_ctx->authkey[0], key, len);
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@@ -3521,16 +3522,19 @@ static int _sha1_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
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} else {
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sha_ctx->alg = QCE_HASH_SHA1;
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sha_ctx->diglen = SHA1_DIGEST_SIZE;
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- _sha_hmac_setkey(tfm, key, len);
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+ ret = _sha_hmac_setkey(tfm, key, len);
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+ if (ret)
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+ pr_err("SHA1 hmac setkey failed\n");
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sha_ctx->authkey_in_len = SHA1_BLOCK_SIZE;
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}
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- return 0;
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+ return ret;
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}
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static int _sha256_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
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unsigned int len)
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{
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struct qcrypto_sha_ctx *sha_ctx = crypto_tfm_ctx(&tfm->base);
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+ int ret = 0;
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memset(&sha_ctx->authkey[0], 0, SHA256_BLOCK_SIZE);
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if (len <= SHA256_BLOCK_SIZE) {
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@@ -3539,11 +3543,13 @@ static int _sha256_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
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} else {
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sha_ctx->alg = QCE_HASH_SHA256;
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sha_ctx->diglen = SHA256_DIGEST_SIZE;
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- _sha_hmac_setkey(tfm, key, len);
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+ ret = _sha_hmac_setkey(tfm, key, len);
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+ if (ret)
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+ pr_err("SHA256 hmac setkey failed\n");
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sha_ctx->authkey_in_len = SHA256_BLOCK_SIZE;
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}
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- return 0;
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+ return ret;
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}
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static int _sha_hmac_init_ihash(struct ahash_request *req,
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