Re: [PATCH v8 01/22] RISC-V: perf: fix resource cleanup on driver probe failure

Paul Walmsley <[email protected]> Tue, 4 Aug 2026 17:25:33 -0600 (MDT)

Newsgroups	org.kernel.vger.linux-perf-users,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-riscv,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On Wed, 1 Jul 2026, Atish Patra wrote:

> From: Atish Patra <[email protected]>
> 
> Sashiko pointed out various UAF and memory leak issues around
> pmu_sbi_device_probe() error paths.
> 
> If the probe fails, here are list of cleanups needed.
> a. Already registered pmu must be freed
> b. per cpu IRQ must be released
> c. pmu_ctr_list data structure must be freed
> d. cpu hotplug state must be cleaned up only if added.
> 
> Fix the resource cleanup by reorganizing the code around probe failure.
> 
> Reported-by: Sashiko AI <[email protected]>
> Signed-off-by: Atish Patra <[email protected]>

Thanks, queued for v7.3.


- Paul