From: rui guo <rui.guo@amlogic.com>
Date: Wed, 24 Nov 2021 09:59:15 +0000 (+0800)
Subject: log: System crash and reboot random when play any content on Netflix [1/1]
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=26c3fb14ad4fc50f0aec0196ce5adb19c00a21de;p=GitHub%2FLineageOS%2FG12%2Fandroid_hardware_amlogic_kernel-modules_optee.git

log: System crash and reboot random when play any content on Netflix [1/1]

PD#OTT-25875

Problem:
detected buffer overflow in memcpy

Solution:
The parameter checking

Verify:
RDK + S905X4

Change-Id: I7d41111e58a7c4667e0c527890e41766970b840b
Signed-off-by: rui guo <rui.guo@amlogic.com>
---

diff --git a/optee/log.c b/optee/log.c
index 247f142..adf2bd0 100644
--- a/optee/log.c
+++ b/optee/log.c
@@ -159,6 +159,9 @@ static size_t log_print_text(char *buf, size_t size)
 	if (size == 0)
 		return 0;
 
+	/* Line_size Out-of-bounds check */
+	text_size = text_size < (OPTEE_LOG_LINE_MAX - 16) ? text_size : OPTEE_LOG_LINE_MAX - 16;
+
 	do {
 		const char *next = memchr(text, '\n', text_size);
 		size_t line_size;