Merge "msm: ipa: Fix to validate the buffer size" (d6d1fb06) · Commits · e / devices / android_kernel_sony_msm8998

drivers/platform/msm/ipa/ipa_v2/ipa_intf.c

+17 −4

Original line number	Diff line number	Diff line
		/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
		/* Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -735,6 +735,12 @@ ssize_t ipa_read(struct file filp, char __user buf, size_t count,
		IPADBG("msg=%pK\n", msg);
		locked = 0;
		mutex_unlock(&ipa_ctx->msg_lock);
		if (count < sizeof(struct ipa_msg_meta)) {
		kfree(msg);
		msg = NULL;
		ret = -EFAULT;
		break;
		}
		if (copy_to_user(buf, &msg->meta,
		sizeof(struct ipa_msg_meta))) {
		kfree(msg);
		@@ -745,6 +751,7 @@ ssize_t ipa_read(struct file filp, char __user buf, size_t count,
		buf += sizeof(struct ipa_msg_meta);
		count -= sizeof(struct ipa_msg_meta);
		if (msg->buff) {
		if (count >= msg->meta.msg_len) {
		if (copy_to_user(buf, msg->buff,
		msg->meta.msg_len)) {
		kfree(msg);
		@@ -752,6 +759,12 @@ ssize_t ipa_read(struct file filp, char __user buf, size_t count,
		ret = -EFAULT;
		break;
		}
		} else {
		kfree(msg);
		msg = NULL;
		ret = -EFAULT;
		break;
		}
		buf += msg->meta.msg_len;
		count -= msg->meta.msg_len;
		msg->callback(msg->buff, msg->meta.msg_len,