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AKwUvByCEYY2HZR3G6BWE6N02u53DMQ8AIOEkQte75T8YFHL5qP/UTfU7HnS+exwcVN1zwem3gaT16MIqLI6aRFE2ZyM@vger.kernel.org X-Gm-Message-State: AFq9FYKMgoFY096LSPnSCBpNMR64ulK8FmKe6oKH1CHu8ZWStXxaAFH6 WZ8pPTZG26tm8UYvBIAuOplC74WqTW5Sl0TaaZjHvfmj8LcZtJwXdT8d5NAzM2B8mvo6ZJ7yIlC E4oyPMpvHfA== X-Received: from dlbsj2-n1.prod.google.com ([2002:a05:7022:f902:10b0:158:5d29:90be]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:3c04:b0:151:2e62:fe6e with SMTP id a92af1059eb24-199363a337fmr5791484c88.19.1792965884027; Sun, 25 Oct 2026 15:04:44 -0700 (PDT) Date: Sun, 25 Oct 2026 15:03:43 -0700 X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 X-Mailer: git-send-email 2.56.0.307.g5fe7bd680c-goog Message-ID: <20261025220349.1244499-1-irogers@google.com> Subject: [PATCH v1 1/7] perf session: Fix minimum event size for PERF_RECORD_CALLCHAIN_DEFERRED From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Zhan Xusheng , Dapeng Mi , Aaron Tomlin , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" struct perf_record_callchain_deferred contains header, cookie, and nr (24 bytes), but perf_event__min_size[PERF_RECORD_CALLCHAIN_DEFERRED] only checked for header + one u64 (16 bytes). Use sizeof(struct perf_record_callchain_deferred). Fixes: c69993ecdd4d ("perf: Support deferred user unwind") Signed-off-by: Ian Rogers --- tools/perf/util/session.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 56a5e57ec512..d9d06337933f 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -2773,7 +2773,7 @@ static const u32 perf_event__min_size[PERF_RECORD_HEADER_MAX] = { [PERF_RECORD_HEADER_FEATURE] = sizeof(struct perf_record_header_feature), [PERF_RECORD_COMPRESSED2] = sizeof(struct perf_record_compressed2), [PERF_RECORD_BPF_METADATA] = sizeof(struct perf_record_bpf_metadata), - [PERF_RECORD_CALLCHAIN_DEFERRED] = sizeof(struct perf_event_header) + sizeof(__u64), + [PERF_RECORD_CALLCHAIN_DEFERRED] = sizeof(struct perf_record_callchain_deferred), /* * SCHEDSTAT events have a version-dependent union after the * fixed header fields; the minimum is the base (pre-union) -- 2.56.0.307.g5fe7bd680c-goog