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https://github.com/Divested-Mobile/DivestOS-Build.git
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105 lines
3.2 KiB
Diff
105 lines
3.2 KiB
Diff
From a829c54236b455885c3e9c7c77ac528b62045e79 Mon Sep 17 00:00:00 2001
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From: AnilKumar Chimata <anilc@codeaurora.org>
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Date: Wed, 31 Aug 2016 14:08:16 +0530
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Subject: qcedev: Validate Source and Destination addresses
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Source and Destination addresses passed by user space apps/clients
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are validated independent of type of operation to mitigate kernel
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address space exploitation.
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Change-Id: I9ecb0103d7a73eedb2e0d1db1d5613b18dd77e59
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Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>
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---
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drivers/crypto/msm/qcedev.c | 68 ++++++++++++++++++++-------------------------
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1 file changed, 30 insertions(+), 38 deletions(-)
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diff --git a/drivers/crypto/msm/qcedev.c b/drivers/crypto/msm/qcedev.c
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index e63f061..1402d3d 100644
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--- a/drivers/crypto/msm/qcedev.c
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+++ b/drivers/crypto/msm/qcedev.c
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@@ -1234,44 +1234,6 @@ static int qcedev_vbuf_ablk_cipher(struct qcedev_async_req *areq,
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struct qcedev_cipher_op_req *saved_req;
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struct qcedev_cipher_op_req *creq = &areq->cipher_op_req;
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- /* Verify Source Address's */
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- for (i = 0; i < areq->cipher_op_req.entries; i++)
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- if (!access_ok(VERIFY_READ,
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- (void __user *)areq->cipher_op_req.vbuf.src[i].vaddr,
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- areq->cipher_op_req.vbuf.src[i].len))
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- return -EFAULT;
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-
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- /* Verify Destination Address's */
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- if (creq->in_place_op != 1) {
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- for (i = 0, total = 0; i < QCEDEV_MAX_BUFFERS; i++) {
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- if ((areq->cipher_op_req.vbuf.dst[i].vaddr != 0) &&
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- (total < creq->data_len)) {
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- if (!access_ok(VERIFY_WRITE,
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- (void __user *)creq->vbuf.dst[i].vaddr,
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- creq->vbuf.dst[i].len)) {
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- pr_err("%s:DST WR_VERIFY err %d=0x%lx\n",
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- __func__, i, (uintptr_t)
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- creq->vbuf.dst[i].vaddr);
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- return -EFAULT;
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- }
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- total += creq->vbuf.dst[i].len;
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- }
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- }
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- } else {
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- for (i = 0, total = 0; i < creq->entries; i++) {
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- if (total < creq->data_len) {
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- if (!access_ok(VERIFY_WRITE,
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- (void __user *)creq->vbuf.src[i].vaddr,
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- creq->vbuf.src[i].len)) {
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- pr_err("%s:SRC WR_VERIFY err %d=0x%lx\n",
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- __func__, i, (uintptr_t)
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- creq->vbuf.src[i].vaddr);
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- return -EFAULT;
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- }
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- total += creq->vbuf.src[i].len;
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- }
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- }
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- }
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total = 0;
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if (areq->cipher_op_req.mode == QCEDEV_AES_MODE_CTR)
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@@ -1569,6 +1531,36 @@ static int qcedev_check_cipher_params(struct qcedev_cipher_op_req *req,
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__func__, total, req->data_len);
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goto error;
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}
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+ /* Verify Source Address's */
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+ for (i = 0, total = 0; i < req->entries; i++) {
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+ if (total < req->data_len) {
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+ if (!access_ok(VERIFY_READ,
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+ (void __user *)req->vbuf.src[i].vaddr,
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+ req->vbuf.src[i].len)) {
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+ pr_err("%s:SRC RD_VERIFY err %d=0x%lx\n",
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+ __func__, i, (uintptr_t)
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+ req->vbuf.src[i].vaddr);
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+ goto error;
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+ }
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+ total += req->vbuf.src[i].len;
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+ }
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+ }
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+
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+ /* Verify Destination Address's */
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+ for (i = 0, total = 0; i < QCEDEV_MAX_BUFFERS; i++) {
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+ if ((req->vbuf.dst[i].vaddr != 0) &&
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+ (total < req->data_len)) {
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+ if (!access_ok(VERIFY_WRITE,
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+ (void __user *)req->vbuf.dst[i].vaddr,
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+ req->vbuf.dst[i].len)) {
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+ pr_err("%s:DST WR_VERIFY err %d=0x%lx\n",
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+ __func__, i, (uintptr_t)
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+ req->vbuf.dst[i].vaddr);
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+ goto error;
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+ }
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+ total += req->vbuf.dst[i].len;
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+ }
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+ }
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return 0;
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error:
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return -EINVAL;
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--
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cgit v1.1
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