From patchwork Mon Sep 30 07:51:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 13815500 Received: from mail-ed1-f46.google.com (mail-ed1-f46.google.com [209.85.208.46]) (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 A8AC4208D0 for ; Mon, 30 Sep 2024 07:51:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727682699; cv=none; b=RUE6NoW++EMdXFq1bBvBjZlw4HTMOQ+1WcTjA6LabzE6qfjCrZIc5Zzm8sOZVvW/6wh+kDllIPoI+dU+gbwopg5oeiBmHtCAzi1wjPRKEIDuNSN8ENEYhPeV1A7MtwxdmSf1UG/xgU/Lh/hMmIyPE64su226R9LmhA4xM8yFcaM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727682699; c=relaxed/simple; bh=TNlfPXvCSXrywBW07xjSEhEu5J7xV2EvmCrnlOk0vB4=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=uWO4h3RHy+kQgdS1VUMAIE/hVmHhIhm/KKkW/j/WBrL+j/e+r41rDdEE3s1EGTscWQ6Okc5MTu1H2gGM6wgjzzrD24S6iMd1+T2cXmxzCFSVkSA0ju9+TbMxF7i/if8qRzeeRzZ/rUbkTbzif4RMlSWRFMupf2Km4l73TK5L5bw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=eFmBFKnx; arc=none smtp.client-ip=209.85.208.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="eFmBFKnx" Received: by mail-ed1-f46.google.com with SMTP id 4fb4d7f45d1cf-5c88370ad7bso3585524a12.3 for ; Mon, 30 Sep 2024 00:51:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1727682696; x=1728287496; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=0HtLOXTTjIcKqonfJsLlHp//JVeIA49rEwOK0SKZI6w=; b=eFmBFKnxICtKJC2VYAdq7exIs/1DDP41NTsN/129lo5VKOwP/x8ctl/0STdnuGArTP E1hTKB6Zmacmiu53nF/y9PcMB96adApXn+XPHyRCdmXJC/8V55QbQScXBOuTp9ELPFnh 4xPt31tDrFxxsJn7Vprf77YLBFKUg1ZWG/sJHYX0jU7cwi5C2TkSyBy2pY7mUM9JD6CL +V2YRA9iBH5nOziUncLJgOUvzzjDH4auLMFGTht8oIbULt8m7TF28U+7ehOAgAxN6tIE sXUJ1x0/autbyOdjmxrcUxqghEouKdUYzq+L7pvuy8Nggu0C59oEAF2GfrTho5YVATB9 lVEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727682696; x=1728287496; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=0HtLOXTTjIcKqonfJsLlHp//JVeIA49rEwOK0SKZI6w=; b=DcZHdIfnfNejzdv8WLR7sBX/mDgT0/T+59IA8s+uY3KcqYn0U2CBEQJeHFFwcg9kCS oSbA323U3fB+2IziBNYvRNep0NMJxiHpN1Ic3edYn2yGRvn5/BLvc1OdP7dp+ytONKTZ t0+YUmLXbnMVRqExz2fLxqn+kPdu5cpjCJ2765i6RpSgsFS4pM8oGbPLBozkzqmsFUaX nRf3dqP31M06gdORuwJHvgOi2M6EdcTj+Yl5g+m+vw4XfoU4neTGXOpYevCrLEff4bE3 4f7ygNQK/Eqe6WOQ0Hiz2CSp9B3+KUImxoOSbAAfaJuFhmFql7i/FqiVIBi4hojZa3Ir JTNg== X-Forwarded-Encrypted: i=1; AJvYcCXWexVIvPOWsIrSfxL7X8kIU8+5QYMK1WgGn4YyA3m71EIe49RdDC4sUlEtH49kmpVYb0gXkHzL8C/Yl8me@vger.kernel.org X-Gm-Message-State: AOJu0Yzy7g3yV7wkSGGUWP6b1h/I2zDzVcowaaLpQ5Fc+gOWv0GAgjWs V4gmhvRixuRnoNr2NHSCeUH6fi+XGxcbTueWgXC7NGzEUyTWLnN+pe6ls5UdzBs= X-Google-Smtp-Source: AGHT+IHNGEtodHztnoGGjOwFV0dQ3UkYN7qzkRnQryDHhNT5sSIM9HlQ0MdjV9+ul5NE0K8elqMvOw== X-Received: by 2002:a05:6402:2406:b0:5c2:112f:aa77 with SMTP id 4fb4d7f45d1cf-5c8826085ecmr9855869a12.31.1727682696042; Mon, 30 Sep 2024 00:51:36 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5c882405ce6sm4127857a12.13.2024.09.30.00.51.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Sep 2024 00:51:35 -0700 (PDT) Date: Mon, 30 Sep 2024 10:51:31 +0300 From: Dan Carpenter To: Karthikeyan Ramasubramanian Cc: Bjorn Andersson , Konrad Dybcio , Sagar Dharia , Evan Green , Andy Gross , Girish Mahadevan , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] soc: qcom: geni-se: fix array underflow in geni_se_clk_tbl_get() Message-ID: <8cd12678-f44a-4b16-a579-c8f11175ee8c@stanley.mountain> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding This loop is supposed to break if the frequency returned from clk_round_rate() is the same as on the previous iteration. However, that check doesn't make sense on the first iteration through the loop. It leads to reading before the start of these->clk_perf_tbl[] array. Fixes: eddac5af0654 ("soc: qcom: Add GENI based QUP Wrapper driver") Signed-off-by: Dan Carpenter --- drivers/soc/qcom/qcom-geni-se.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 2e8f24d5da80..4cb959106efa 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -585,7 +585,8 @@ int geni_se_clk_tbl_get(struct geni_se *se, unsigned long **tbl) for (i = 0; i < MAX_CLK_PERF_LEVEL; i++) { freq = clk_round_rate(se->clk, freq + 1); - if (freq <= 0 || freq == se->clk_perf_tbl[i - 1]) + if (freq <= 0 || + (i > 0 && freq == se->clk_perf_tbl[i - 1])) break; se->clk_perf_tbl[i] = freq; }