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qseecom: Fix accessing userspace memory in kernel space 

Use put_user API to write the data from kernel space to
userspace to avoid accessing userspace memory directly
in kernel space.

Bug: 65468973
Change-Id: I649fe2597e80ccad50cf16b355e220734810e94c
Signed-off-by: Brahmaji K <bkomma@codeaurora.org>
This commit is contained in:
Brahmaji K 2017-06-01 17:20:10 +05:30 committed by syphyr
parent 1287f1a46f
commit 2d37893dce
1 changed files with 5 additions and 1 deletions
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6
drivers/misc/qseecom.c
View File

@ -2658,7 +2658,11 @@ static int qseecom_send_service_cmd(struct qseecom_dev_handle *data,
}
if (req.cmd_id == QSEOS_RPMB_CHECK_PROV_STATUS_COMMAND) {
pr_warn("RPMB key status is 0x%x\n", resp.result);
*(uint32_t *)req.resp_buf = resp.result;
if (put_user(resp.result,
(uint32_t __user *)req.resp_buf)) {
ret = -EINVAL;
goto exit;
}
ret = 0;
}
break;