linux-kernel - Re: [PATCH v1 1/8] perf disasm: Avoid undefined behavior in incrementing NULL

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Message-ID: <Z117D0rj6waa/cNs@visitorckw-System-Product-Name>
Date: Sat, 14 Dec 2024 20:33:19 +0800
From: Kuan-Wei Chiu <visitorckw@...il.com>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	"Mike Rapoport (IBM)" <rppt@...nel.org>,
	Wei Yang <richard.weiyang@...il.com>,
	James Clark <james.clark@...aro.org>,
	Howard Chu <howardchu95@...il.com>,
	Kajol Jain <kjain@...ux.ibm.com>,
	Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
	Ze Gao <zegao2021@...il.com>, Weilin Wang <weilin.wang@...el.com>,
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v1 1/8] perf disasm: Avoid undefined behavior in
 incrementing NULL

On Fri, Dec 13, 2024 at 01:04:18PM -0800, Ian Rogers wrote:
> Incrementing NULL is undefined behavior and triggers ubsan during the
> perf annotate test. Split a compound statement over two lines to avoid
> this.
> 
> Fixes: 98f69a573c66 ("perf annotate: Split out util/disasm.c")
> Signed-off-by: Ian Rogers <irogers@...gle.com>

Reviewed-by: Kuan-Wei Chiu <visitorckw@...il.com>

Regards,
Kuan-Wei