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Commit 6a3b8afd authored by Zhen Kong's avatar Zhen Kong Committed by Gerrit - the friendly Code Review server
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qseecom: add mutex around qseecom_set_client_mem_param 



Add mutex around qseecom_set_client_mem_param to prevent an
ioctl thread modifying and corrupting data which is being
processed by another ioctl in the other thread

Change-Id: I0cfb8afab4001c2913be693dfe44c761b9568893
Signed-off-by: default avatarZhen Kong <zkong@codeaurora.org>
parent 99d5011c

drivers/misc/qseecom.c

+4 −0
Original line number Diff line number Diff line
@@ -6982,7 +6982,11 @@ long qseecom_ioctl(struct file *file, unsigned cmd, unsigned long arg) 
			break;

		}

		pr_debug("SET_MEM_PARAM: qseecom addr = 0x%pK\n", data);

		mutex_lock(&app_access_lock);

		atomic_inc(&data->ioctl_count);

		ret = qseecom_set_client_mem_param(data, argp);

		atomic_dec(&data->ioctl_count);

		mutex_unlock(&app_access_lock);

		if (ret)

			pr_err("failed Qqseecom_set_mem_param request: %d\n",

								ret);