From: Miaoqian Lin <linmq006@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
"Liang, Kan" <kan.liang@linux.intel.com>,
James Clark <james.clark@linaro.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH] perf: pmu: Fix IS_ERR() vs NULL check bug in perf_pmu__init
Date: Tue, 5 Aug 2025 10:32:07 +0400 [thread overview]
Message-ID: <20250805063209.3678359-1-linmq006@gmail.com> (raw)
Replace NULL check with IS_ERR() check after calling
hashmap__new() since this function return error pointers (ERR_PTR).
Using NULL check could lead to invalid pointer dereference.
Fixes: 754baf426e09 ("perf pmu: Change aliases from list to hashmap")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
tools/perf/util/pmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 5a291f1380ed..da6f05872493 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1176,7 +1176,7 @@ int perf_pmu__init(struct perf_pmu *pmu, __u32 type, const char *name)
return -ENOMEM;
pmu->aliases = hashmap__new(aliases__hash, aliases__equal, /*ctx=*/ NULL);
- if (!pmu->aliases)
+ if (IS_ERR(pmu->aliases))
return -ENOMEM;
return 0;
--
2.25.1
next reply other threads:[~2025-08-05 6:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-05 6:32 Miaoqian Lin [this message]
2025-08-15 20:35 ` Namhyung Kim
2025-08-18 19:54 ` Ian Rogers
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