linux-kernel - Re: [PATCH v17 0/3] binder: report txn errors via generic netlink

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Message-ID: <Z_-Jcv-GN68zILvH@google.com>
Date: Wed, 16 Apr 2025 10:41:54 +0000
From: Alice Ryhl <aliceryhl@...gle.com>
To: Li Li <dualli@...omium.org>
Cc: dualli@...gle.com, corbet@....net, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
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Subject: Re: [PATCH v17 0/3] binder: report txn errors via generic netlink

On Tue, Apr 15, 2025 at 12:10:14AM -0700, Li Li wrote:
> From: Li Li <dualli@...gle.com>
> 
> It's a known issue that neither the frozen processes nor the system
> administration process of the OS can correctly deal with failed binder
> transactions. The reason is that there's no reliable way for the user
> space administration process to fetch the binder errors from the kernel
> binder driver.
> 
> Android is such an OS suffering from this issue. Since cgroup freezer
> was used to freeze user applications to save battery, innocent frozen
> apps have to be killed when they receive sync binder transactions or
> when their async binder buffer is running out.
> 
> This patch introduces the Linux generic netlink messages into the binder
> driver so that the Linux/Android system administration process can
> listen to important events and take corresponding actions, like stopping
> a broken app from attacking the OS by sending huge amount of spamming
> binder transactiions.

I'm a bit confused about this series. Why is [PATCH] binder: add
setup_report permission a reply to [PATCH v17 1/3] lsm, selinux: Add
setup_report permission to binder? Which patches are supposed to be
included and in which order?

Alice