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AJvYcCVrnzTxVIYQdiFcQe5+wk7HJpjpZ3xiube1+EI9CvPcOpzOC1MFipWwxyWLYrO9J/UsL/tNn7DHT/M/M1JO8t34@vger.kernel.org X-Gm-Message-State: AOJu0YxdhiEAQDTykFMwHxtXZcUreGvbWM8SwSOhQxbw0J/ir6sI2U6d 7vuI/suFleVq0OdVRUfWl8zzo3F6xwWDG+PCT0JjmRwbybDZdPBIuEtHNFq2FzAk2Trs4BfbwqG igeDhw3GVHw== X-Received: from dyr17.prod.google.com ([2002:a05:693c:4011:b0:2d2:de31:8da0]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:220d:b0:2c5:ed1b:c8a with SMTP id 5a478bee46e88-2d5871bcb9emr3846515eec.5.1775890708904; Fri, 10 Apr 2026 23:58:28 -0700 (PDT) Date: Fri, 10 Apr 2026 23:57:17 -0700 In-Reply-To: <20260411065718.372240-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260408072601.210837-1-irogers@google.com> <20260411065718.372240-1-irogers@google.com> X-Mailer: git-send-email 2.53.0.1213.gd9a14994de-goog Message-ID: <20260411065718.372240-29-irogers@google.com> Subject: [PATCH v8 28/29] perf kwork: Fix address sanitizer issues From: Ian Rogers To: namhyung@kernel.org Cc: irogers@google.com, acme@kernel.org, adrian.hunter@intel.com, ajones@ventanamicro.com, ak@linux.intel.com, alex@ghiti.fr, alexander.shishkin@linux.intel.com, anup@brainfault.org, aou@eecs.berkeley.edu, atrajeev@linux.ibm.com, blakejones@google.com, ctshao@google.com, dapeng1.mi@linux.intel.com, derek.foreman@collabora.com, dvyukov@google.com, howardchu95@gmail.com, hrishikesh123s@gmail.com, james.clark@linaro.org, jolsa@kernel.org, krzysztof.m.lopatowski@gmail.com, leo.yan@arm.com, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux@treblig.org, mingo@redhat.com, nichen@iscas.ac.cn, palmer@dabbelt.com, peterz@infradead.org, pjw@kernel.org, ravi.bangoria@amd.com, swapnil.sapkal@amd.com, tanze@kylinos.cn, thomas.falcon@intel.com, tianyou.li@intel.com, yujie.liu@intel.com, zhouquan@iscas.ac.cn Content-Type: text/plain; charset="UTF-8" There is a double free in the record array due to how parse_options will mutate the array. Fix by keeping an array that isn't mutated. Ensure kwork_usage is freed on all paths. Signed-off-by: Ian Rogers --- tools/perf/builtin-kwork.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c index ab17d3198b93..8430a79a02ba 100644 --- a/tools/perf/builtin-kwork.c +++ b/tools/perf/builtin-kwork.c @@ -2258,7 +2258,7 @@ static void setup_event_list(struct perf_kwork *kwork, static int perf_kwork__record(struct perf_kwork *kwork, int argc, const char **argv) { - const char **rec_argv; + const char **rec_argv, **to_free; unsigned int rec_argc, i, j; struct kwork_class *class; int ret; @@ -2279,6 +2279,9 @@ static int perf_kwork__record(struct perf_kwork *kwork, rec_argv = calloc(rec_argc + 1, sizeof(char *)); if (rec_argv == NULL) return -ENOMEM; + to_free = calloc(rec_argc + 1, sizeof(char *)); + if (to_free == NULL) + return -ENOMEM; for (i = 0; i < ARRAY_SIZE(record_args); i++) rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); @@ -2296,15 +2299,20 @@ static int perf_kwork__record(struct perf_kwork *kwork, BUG_ON(i != rec_argc); pr_debug("record comm: "); - for (j = 0; j < rec_argc; j++) + for (j = 0; j < rec_argc; j++) { pr_debug("%s ", rec_argv[j]); + /* Save the pointers as the array will be mutated by cmd_record. */ + to_free[j] = rec_argv[j]; + } pr_debug("\n"); ret = cmd_record(i, rec_argv); EXIT: for (i = 0; i < rec_argc; i++) - free((void *)rec_argv[i]); + free((void *)to_free[i]); + + free(to_free); free(rec_argv); return ret; } @@ -2447,6 +2455,7 @@ int cmd_kwork(int argc, const char **argv) const char *const kwork_subcommands[] = { "record", "report", "latency", "timehist", "top", NULL }; + int ret = 0; perf_tool__init(&kwork.tool, /*ordered_events=*/true); kwork.tool.mmap = perf_event__process_mmap; @@ -2463,7 +2472,7 @@ int cmd_kwork(int argc, const char **argv) if (strlen(argv[0]) > 2 && strstarts("record", argv[0])) { setup_event_list(&kwork, kwork_options, kwork_usage); - return perf_kwork__record(&kwork, argc, argv); + ret = perf_kwork__record(&kwork, argc, argv); } else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) { kwork.sort_order = default_report_sort_order; if (argc > 1) { @@ -2474,7 +2483,7 @@ int cmd_kwork(int argc, const char **argv) kwork.report = KWORK_REPORT_RUNTIME; setup_sorting(&kwork, report_options, report_usage); setup_event_list(&kwork, kwork_options, kwork_usage); - return perf_kwork__report(&kwork); + ret = perf_kwork__report(&kwork); } else if (strlen(argv[0]) > 2 && strstarts("latency", argv[0])) { kwork.sort_order = default_latency_sort_order; if (argc > 1) { @@ -2485,7 +2494,7 @@ int cmd_kwork(int argc, const char **argv) kwork.report = KWORK_REPORT_LATENCY; setup_sorting(&kwork, latency_options, latency_usage); setup_event_list(&kwork, kwork_options, kwork_usage); - return perf_kwork__report(&kwork); + ret = perf_kwork__report(&kwork); } else if (strlen(argv[0]) > 2 && strstarts("timehist", argv[0])) { if (argc > 1) { argc = parse_options(argc, argv, timehist_options, timehist_usage, 0); @@ -2494,7 +2503,7 @@ int cmd_kwork(int argc, const char **argv) } kwork.report = KWORK_REPORT_TIMEHIST; setup_event_list(&kwork, kwork_options, kwork_usage); - return perf_kwork__timehist(&kwork); + ret = perf_kwork__timehist(&kwork); } else if (strlen(argv[0]) > 2 && strstarts("top", argv[0])) { kwork.sort_order = default_top_sort_order; if (argc > 1) { @@ -2507,12 +2516,12 @@ int cmd_kwork(int argc, const char **argv) kwork.event_list_str = "sched, irq, softirq"; setup_event_list(&kwork, kwork_options, kwork_usage); setup_sorting(&kwork, top_options, top_usage); - return perf_kwork__top(&kwork); + ret = perf_kwork__top(&kwork); } else usage_with_options(kwork_usage, kwork_options); /* free usage string allocated by parse_options_subcommand */ free((void *)kwork_usage[0]); - return 0; + return ret; } -- 2.53.0.1213.gd9a14994de-goog