From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C50DC49EC45; Fri, 4 Sep 2026 14:17:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788531442; cv=none; b=kDVSz1azsA3+AsVrIVqZ2gUVboSjR3xKog7RV63veccl4tMdLvDIrRaGdwDHtmA3CFvtx5KGp7a5aflu0uXvnAAQ8fmsofnYu2vzWUth3TsmPNk4BywiznTWYF7Wa1P61SAE69VIczJFhFHwTiEtE/0J+NPoCdH474JoMH0rV28= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788531442; c=relaxed/simple; bh=pT9sdg+CfMTYJSz0VcJtLaqEyqz4UIzLUnqcZ9zN/Ts=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=BLNpEbE0JslOKJSa+aH9JAE3zbKtL4dGCxHn+JE7nyXEY+Rv0hIMzftPEEsIZdn3aZjKFp/jsl5FweeImURZUHvYuDupjdFeidttF7/x23n8HkZVL7oxnyL0l8pVQs05jWjFL2T1TZvulmRlpJE+PIGPkj7eRZ+xbBZoYv8IV2U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hDCTJ43U; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hDCTJ43U" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 640B71F00A3D; Fri, 4 Sep 2026 14:17:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788531441; bh=Qy6d4nELX8J/khKPdYa1XVS0tZxs5YB/dlFsCmQO1/0=; h=From:To:Cc:Subject:Date; b=hDCTJ43Uz4E0nD/07uj4/5gp6XPWVuy9P8YWX5oy4FXEUCHLhMv5d2Y6aEiOdoq6g 6Eq0U/U01hRpLPsa8ZMaMG+Lb+6FCMBggltrf9KwuLo8qbLNrt1EPhHin+YxjfyryN DkEyhjW6a8ft8Y1Bj0Qw4U+NBejedLdrD0a5R8ga47KX5OVnpIOkuWqyXhLYZvT/DD a2UV1NHwtNOExDmdORfXVXrqeOVKmo/JWokaSu/sWweTlFuE5aCX526PfHBSXMSkoJ Gm+2wOvoLNwdK0Cqb7qbCtO3USC2vck9gZ1Sbrhg85ySBfQP7t96Ko4aTgoIikm+aT p4Cb3Qxlo01Og== From: Thorsten Blum To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Thomas Gleixner , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Kees Cook , "Gustavo A. R. Silva" Cc: Thorsten Blum , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH] perf/x86/intel: Annotate x86_pmu::hybrid_pmu with __counted_by_ptr Date: Fri, 4 Sep 2026 16:17:00 +0200 Message-ID: <20260904141659.224248-2-blum@kernel.org> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=738; i=blum@kernel.org; h=from:subject; bh=pT9sdg+CfMTYJSz0VcJtLaqEyqz4UIzLUnqcZ9zN/Ts=; b=owGbwMvMwCUWt7pQ4caZUj3G02pJDFmzLt1OPvn2xc0f2Us6v9+KPPVzyhq9bdkPtxzOuJ004 Z5nTNVhz45SFgYxLgZZMUWWB7N+zPAtrancZBKxE2YOKxPIEAYuTgGYyJSLDP+rGi7FhXt7zbZe V+Tw2Ns9qWnry07/HWs6Q6auOvF5SzEvI8MePcObJ31e9hbveBL4VrjgZuN90Q+6By/afdzhsUq v9CQnAA== X-Developer-Key: i=blum@kernel.org; a=openpgp; fpr=1D60735E8AEF3BE473B69D84733678FD8DFEEAD4 Content-Transfer-Encoding: 8bit Add __counted_by_ptr() to x86_pmu::hybrid_pmu to improve access bounds checking via CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE. Signed-off-by: Thorsten Blum --- arch/x86/events/perf_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 71ed5b2acea2..b66691a4fc31 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -1050,7 +1050,7 @@ struct x86_pmu { * unique capabilities. */ int num_hybrid_pmus; - struct x86_hybrid_pmu *hybrid_pmu; + struct x86_hybrid_pmu *hybrid_pmu __counted_by_ptr(num_hybrid_pmus); enum intel_cpu_type (*get_hybrid_cpu_type) (void); };