From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f72.google.com (mail-pj1-f72.google.com [209.85.216.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C517A451064 for ; Mon, 20 Jul 2026 17:55:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784570117; cv=none; b=Br3q33SL62MA6ZySRzVv1DDZb21MRI190+K/20O3wtIzGzeCU4+rMQp1JV7O6HpgkMZhRY3IJzO+jfMohoPHFRsXDE9zdgZjRFj2CpgngJC+UU6gi+cYjXhg5Y6VCxwZlz4+bj82aVb1zYZMrLfOgNyIdQhuATTpxpz7KeaIQIw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784570117; c=relaxed/simple; bh=yjB7ri51sRv8a67LTV4PcAIOS6YMv6zzhISrqstsl6s=; h=Date:Mime-Version:Message-ID:Subject:From:To:Content-Type; b=ssEiSroVdvC8I9oyK8wDUhSULEENDC7tuuqNAE4X+ngaAWwB9qWZ7XszgRwcNAhHfuMsYzBj9nz6MXksQArdZe+zDvWSzxqHZuEn2L2vHXJNfRvpJ2XetO/0aJKGhHpMlLdTs9hYU/QkfsoDkVaMXU7OLHWQ6xVuGDej21CGtw0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=quzWoZ8m; arc=none smtp.client-ip=209.85.216.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="quzWoZ8m" Received: by mail-pj1-f72.google.com with SMTP id 98e67ed59e1d1-38e2237bc43so11515290a91.1 for ; Mon, 20 Jul 2026 10:55:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1784570112; x=1785174912; darn=vger.kernel.org; h=content-type:to:from:subject:message-id:mime-version:date:from:to :cc:subject:date:message-id:reply-to:content-type; bh=0dzLHwHhvSPdtzi9CiI47Fmz7JMUGgBi8NSrYJQVh48=; b=quzWoZ8mP1m4VUGjEIR/hkl7+XYsAORNh+zFTamWwgciTyw8dqlaF002rGB6itskJp GRHBFPlv6HQJX+yjrtcIguWgibxoIzHdoQeoXDYBQiTwdNKqG784wwM3hsqs+nWzODT+ d8SSUxmgz9eIPgYQPhl7/ATnqn9122TqBT98w2OKUgWbJDAo8eNfbpmRmrqJmosoPllZ ZGIS8WzjSonC+Bu7So7HtKZO2S3Et7SmL+TY5oghp+7LF7bWEsR2THYeCgL0Rr13OP5l suOLRiILdcGss9szrV0pVQ9LIPBDC+eObOhmyDm+RVHSl021FK/gVE3JlxxZZhEdyy5f 2eeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784570112; x=1785174912; h=content-type:to:from:subject:message-id:mime-version:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=0dzLHwHhvSPdtzi9CiI47Fmz7JMUGgBi8NSrYJQVh48=; b=XovwCd2Bv7yXeccSl4M+liP/on05BruRnbAkLqmZZFT1nzNd48cmC2wqCGgAVCqMEi /REYW8jbg76UQJA5xHW1vgfYqFpr5xCBPXzQtXsl62zbrp+nnXVCdSmdPwAios3vuwsK Btq2EAfKI6sUtU5rW0WQ8ceMC6AaJ22e5vEDEITFVc7VQjT9cfOGCddB/eCj68/EaFm4 yU9mgCejpG7VYtLtgOuokMMvdiuml5rD5fsaaZmVKKJS9InOkAwT+LQ2dh9Mfil+ZjD3 tvNoJ3AKXNS7+zBwalKHGcb1xLq4QehcHCsZI8383gDywDIHd3kV8S+zD+b7g/6orgdn pN5g== X-Forwarded-Encrypted: i=1; AHgh+RrLwjZkp4+vGH9gscLtoPLf3/jLcIMf2TlSBx7U+a0Avbwh6BUXlVHPGFgxX7ZiMtIry9OBl3eBbx+oky8=@vger.kernel.org X-Gm-Message-State: AOJu0YyHBvCqaC6bZvt7Xfs+jcTVZHP/cccIl0NKuAvzvxj8AskSDU9c OQFIFqFuwLhb/p0AQadBiihJDFq+w6pnZXgVq2kLd+ZCKDWH8NlOok4U8XVv/bdJd4FT3DYK/II wPdzSIujKcw== X-Received: from dlak16.prod.google.com ([2002:a05:701b:2910:b0:13b:9a32:b2d]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2f8f:b0:36d:689a:cb27 with SMTP id 98e67ed59e1d1-38e4b538f90mr15448710a91.24.1784570111397; Mon, 20 Jul 2026 10:55:11 -0700 (PDT) Date: Mon, 20 Jul 2026 10:54:51 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.229.g6434b31f56-goog Message-ID: <20260720175455.3645946-1-irogers@google.com> Subject: [PATCH v1 0/4] perf: Fix and optimize maps parsing, boundaries, and bounds safety From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Ravi Bangoria , Swapnil Sapkal , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" It turns out that PATH_MAX is respected by system calls but isn't respected by file paths in /proc/pid/maps and /proc/pid/smaps. In the kernel "//toolong" is placed in the filename of mmap/mmap2 events where the filename is longer than PATH_MAX, do the same in the mmap/mmap2 synthesis code to avoid overrunning the event buffer. With Gemini's help try to address other correctness and overrun issues. Ian Rogers (4): perf find-map: Remove PATH_MAX 128-byte stack array restriction perf synthetic-events: Fix line synchronization, bounds, and truncation bugs in proc maps reader perf synthetic-events: Fix bounds, stale state, and misc flags in kernel module synthesis perf synthetic-events: Fix bounds and union member access in mmap2 build_id synthesis tools/perf/util/find-map.c | 11 +- tools/perf/util/synthetic-events.c | 271 ++++++++++++++++++++--------- 2 files changed, 196 insertions(+), 86 deletions(-) -- 2.55.0.229.g6434b31f56-goog