Re: [PATCH] perf: RISC-V: check cpu_hw_evt before dereference in overflow IRQ

Paul Walmsley <[email protected]> Fri, 7 Aug 2026 18:45:00 -0600 (MDT)

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

Hi,

On Fri, 7 Aug 2026, Xixin Liu wrote:

> The overflow IRQ handler dereferences cpu_hw_evt before the null check.
> Move the check first. Defensive only; the cookie is valid on the normal
> path today.
> 
> Signed-off-by: Xixin Liu <[email protected]>

Could you please add a Fixes: tag?  Also, if it was written with LLM 
assistance, please add the appropriate Assisted-by: tag.

thanks 

- Paul