linux-kernel - Re: [PATCH v1] uprobes: use pagesize-aligned virtual address when replacing pages

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Date: Mon, 15 Jan 2024 15:25:18 +0100
From: Oleg Nesterov <oleg@...hat.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-perf-users@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Ryan Roberts <ryan.roberts@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Namhyung Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH v1] uprobes: use pagesize-aligned virtual address when
 replacing pages

On 01/15, David Hildenbrand wrote:
>
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -537,7 +537,7 @@ int uprobe_write_opcode(struct arch_uprobe *auprobe, struct mm_struct *mm,
>  		}
>  	}
>  
> -	ret = __replace_page(vma, vaddr, old_page, new_page);
> +	ret = __replace_page(vma, vaddr & PAGE_MASK, old_page, new_page);

Acked-by: Oleg Nesterov <oleg@...hat.com>