mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-10 08:24:20 -05:00
105 lines
3.2 KiB
Diff
105 lines
3.2 KiB
Diff
|
From a829c54236b455885c3e9c7c77ac528b62045e79 Mon Sep 17 00:00:00 2001
|
||
|
From: AnilKumar Chimata <anilc@codeaurora.org>
|
||
|
Date: Wed, 31 Aug 2016 14:08:16 +0530
|
||
|
Subject: qcedev: Validate Source and Destination addresses
|
||
|
|
||
|
Source and Destination addresses passed by user space apps/clients
|
||
|
are validated independent of type of operation to mitigate kernel
|
||
|
address space exploitation.
|
||
|
|
||
|
Change-Id: I9ecb0103d7a73eedb2e0d1db1d5613b18dd77e59
|
||
|
Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>
|
||
|
---
|
||
|
drivers/crypto/msm/qcedev.c | 68 ++++++++++++++++++++-------------------------
|
||
|
1 file changed, 30 insertions(+), 38 deletions(-)
|
||
|
|
||
|
diff --git a/drivers/crypto/msm/qcedev.c b/drivers/crypto/msm/qcedev.c
|
||
|
index e63f061..1402d3d 100644
|
||
|
--- a/drivers/crypto/msm/qcedev.c
|
||
|
+++ b/drivers/crypto/msm/qcedev.c
|
||
|
@@ -1234,44 +1234,6 @@ static int qcedev_vbuf_ablk_cipher(struct qcedev_async_req *areq,
|
||
|
struct qcedev_cipher_op_req *saved_req;
|
||
|
struct qcedev_cipher_op_req *creq = &areq->cipher_op_req;
|
||
|
|
||
|
- /* Verify Source Address's */
|
||
|
- for (i = 0; i < areq->cipher_op_req.entries; i++)
|
||
|
- if (!access_ok(VERIFY_READ,
|
||
|
- (void __user *)areq->cipher_op_req.vbuf.src[i].vaddr,
|
||
|
- areq->cipher_op_req.vbuf.src[i].len))
|
||
|
- return -EFAULT;
|
||
|
-
|
||
|
- /* Verify Destination Address's */
|
||
|
- if (creq->in_place_op != 1) {
|
||
|
- for (i = 0, total = 0; i < QCEDEV_MAX_BUFFERS; i++) {
|
||
|
- if ((areq->cipher_op_req.vbuf.dst[i].vaddr != 0) &&
|
||
|
- (total < creq->data_len)) {
|
||
|
- if (!access_ok(VERIFY_WRITE,
|
||
|
- (void __user *)creq->vbuf.dst[i].vaddr,
|
||
|
- creq->vbuf.dst[i].len)) {
|
||
|
- pr_err("%s:DST WR_VERIFY err %d=0x%lx\n",
|
||
|
- __func__, i, (uintptr_t)
|
||
|
- creq->vbuf.dst[i].vaddr);
|
||
|
- return -EFAULT;
|
||
|
- }
|
||
|
- total += creq->vbuf.dst[i].len;
|
||
|
- }
|
||
|
- }
|
||
|
- } else {
|
||
|
- for (i = 0, total = 0; i < creq->entries; i++) {
|
||
|
- if (total < creq->data_len) {
|
||
|
- if (!access_ok(VERIFY_WRITE,
|
||
|
- (void __user *)creq->vbuf.src[i].vaddr,
|
||
|
- creq->vbuf.src[i].len)) {
|
||
|
- pr_err("%s:SRC WR_VERIFY err %d=0x%lx\n",
|
||
|
- __func__, i, (uintptr_t)
|
||
|
- creq->vbuf.src[i].vaddr);
|
||
|
- return -EFAULT;
|
||
|
- }
|
||
|
- total += creq->vbuf.src[i].len;
|
||
|
- }
|
||
|
- }
|
||
|
- }
|
||
|
total = 0;
|
||
|
|
||
|
if (areq->cipher_op_req.mode == QCEDEV_AES_MODE_CTR)
|
||
|
@@ -1569,6 +1531,36 @@ static int qcedev_check_cipher_params(struct qcedev_cipher_op_req *req,
|
||
|
__func__, total, req->data_len);
|
||
|
goto error;
|
||
|
}
|
||
|
+ /* Verify Source Address's */
|
||
|
+ for (i = 0, total = 0; i < req->entries; i++) {
|
||
|
+ if (total < req->data_len) {
|
||
|
+ if (!access_ok(VERIFY_READ,
|
||
|
+ (void __user *)req->vbuf.src[i].vaddr,
|
||
|
+ req->vbuf.src[i].len)) {
|
||
|
+ pr_err("%s:SRC RD_VERIFY err %d=0x%lx\n",
|
||
|
+ __func__, i, (uintptr_t)
|
||
|
+ req->vbuf.src[i].vaddr);
|
||
|
+ goto error;
|
||
|
+ }
|
||
|
+ total += req->vbuf.src[i].len;
|
||
|
+ }
|
||
|
+ }
|
||
|
+
|
||
|
+ /* Verify Destination Address's */
|
||
|
+ for (i = 0, total = 0; i < QCEDEV_MAX_BUFFERS; i++) {
|
||
|
+ if ((req->vbuf.dst[i].vaddr != 0) &&
|
||
|
+ (total < req->data_len)) {
|
||
|
+ if (!access_ok(VERIFY_WRITE,
|
||
|
+ (void __user *)req->vbuf.dst[i].vaddr,
|
||
|
+ req->vbuf.dst[i].len)) {
|
||
|
+ pr_err("%s:DST WR_VERIFY err %d=0x%lx\n",
|
||
|
+ __func__, i, (uintptr_t)
|
||
|
+ req->vbuf.dst[i].vaddr);
|
||
|
+ goto error;
|
||
|
+ }
|
||
|
+ total += req->vbuf.dst[i].len;
|
||
|
+ }
|
||
|
+ }
|
||
|
return 0;
|
||
|
error:
|
||
|
return -EINVAL;
|
||
|
--
|
||
|
cgit v1.1
|
||
|
|