linux-kernel - Re: [PATCH v2] coresight: trbe: Return NULL pointer for allocation failures

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Message-ID: <175707517468.1603863.4031069288262415474.b4-ty@arm.com>
Date: Fri,  5 Sep 2025 13:26:30 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@...aro.org>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Leo Yan <leo.yan@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Tamas Zsoldos <tamas.zsoldos@....com>
Subject: Re: [PATCH v2] coresight: trbe: Return NULL pointer for allocation failures


On Thu, 04 Sep 2025 15:13:52 +0100, Leo Yan wrote:
> When the TRBE driver fails to allocate a buffer, it currently returns
> the error code "-ENOMEM". However, the caller etm_setup_aux() only
> checks for a NULL pointer, so it misses the error. As a result, the
> driver continues and eventually causes a kernel panic.
> 
> Fix this by returning a NULL pointer from arm_trbe_alloc_buffer() on
> allocation failures. This allows that the callers can properly handle
> the failure.
> 
> [...]

Applied, thanks!

[1/1] coresight: trbe: Return NULL pointer for allocation failures
      https://git.kernel.org/coresight/c/811e07b1812a

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