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[176.58.251.75]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49808199a5csm298759465e9.4.2026.08.03.00.50.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2026 00:50:05 -0700 (PDT) Date: Mon, 3 Aug 2026 10:50:04 +0300 From: Michail Tatas To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, james.clark@linaro.org Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] perf ftrace: Fix leak in parse_filter_event Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline strsep() advances the pointer given to it. After the loop s is either NULL (on success) or points mid buffer (early exit if malloc fails) so the original buffer is never freed properly. Fix by adding a tmp pointer for use by strsep and free the original pointer Signed-off-by: Michail Tatas --- tools/perf/builtin-ftrace.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index f7126196b092..4f881a40c311 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -1607,14 +1607,15 @@ static int parse_filter_event(const struct option *opt, const char *str, { struct list_head *head = opt->value; struct filter_entry *entry; - char *s, *p; + char *s, *p, *tmp; int ret = -ENOMEM; s = strdup(str); if (s == NULL) return -ENOMEM; - while ((p = strsep(&s, ",")) != NULL) { + tmp = s; + while ((p = strsep(&tmp, ",")) != NULL) { entry = malloc(sizeof(*entry) + strlen(p) + 1); if (entry == NULL) goto out; -- 2.43.0