linux-kernel - [PATCH v2 12/18] perf hists browser: Avoid potential NULL dereference

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Message-Id: <20231005230851.3666908-13-irogers@google.com>
Date:   Thu,  5 Oct 2023 16:08:45 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Yicong Yang <yangyicong@...ilicon.com>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        Yang Jihong <yangjihong1@...wei.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Ming Wang <wangming01@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>,
        Sean Christopherson <seanjc@...gle.com>,
        K Prateek Nayak <kprateek.nayak@....com>,
        Yanteng Si <siyanteng@...ngson.cn>,
        Yuan Can <yuancan@...wei.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        James Clark <james.clark@....com>, llvm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        bpf@...r.kernel.org
Subject: [PATCH v2 12/18] perf hists browser: Avoid potential NULL dereference

On other code paths browser->he_selection is NULL checked, add a
missing case reported by clang-tidy.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/ui/browsers/hists.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index f02ee605bbce..f4812b226818 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -3302,7 +3302,7 @@ static int evsel__hists_browse(struct evsel *evsel, int nr_events, const char *h
 							&options[nr_options],
 							&bi->to.ms,
 							bi->to.al_addr);
-		} else {
+		} else if (browser->he_selection) {
 			nr_options += add_annotate_opt(browser,
 						       &actions[nr_options],
 						       &options[nr_options],
-- 
2.42.0.609.gbb76f46606-goog