linux-kernel - Re: [PATCH v3] coresight: ETR: Fix ETR buffer use-after-free issue

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Message-ID: <176235893222.387743.2128022832743502879.b4-ty@arm.com>
Date: Wed,  5 Nov 2025 16:13:30 +0000
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@...aro.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Linu Cherian <lcherian@...vell.com>,
	Xiaoqi Zhuang <xiaoqi.zhuang@....qualcomm.com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3] coresight: ETR: Fix ETR buffer use-after-free issue


On Tue, 21 Oct 2025 16:45:25 +0800, Xiaoqi Zhuang wrote:
> When ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed
> and enabled again, currently sysfs_buf will point to the newly
> allocated memory(buf_new) and free the old memory(buf_old). But the
> etr_buf that is being used by the ETR remains pointed to buf_old, not
> updated to buf_new. In this case, it will result in a memory
> use-after-free issue.
> 
> [...]

Applied, thanks!

[1/1] coresight: ETR: Fix ETR buffer use-after-free issue
      https://git.kernel.org/coresight/c/35501ac3c7d4

Best regards,
-- 
Suzuki K Poulose <suzuki.poulose@....com>