From patchwork Thu Oct 17 19:40:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 836463 Received: from mail-ej1-f53.google.com (mail-ej1-f53.google.com [209.85.218.53]) (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 4B7AC219CB7 for ; Thu, 17 Oct 2024 19:40:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729194019; cv=none; b=kooOp71wx66YPkS3+3GEJM+/6QmEWoWVBc2gScXiSx2jAyqtHqkqy0YXlRePf2CkvlEbdlQRCqlcIPM987cGjX3yCv/o/JnjrsnqaEurQn3opIbPkedEHyZUXaebeHnhMI+BQammbkRlGkInr7u2NC2Mc6dLG84uKirNuVJhfBU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729194019; c=relaxed/simple; bh=3cjJavFR6NC/HCRHI9EPOyrqnyNGb2dE/RAZTMIh2Bk=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=Q5dnC4hJdpNO8R+v+bfDapqXHtbufhgHJOHEV48JZFJUJdQE9jUbRA7Q6j8hgSfao/gB6aPheVib8EplzQwolhe2Ggql0QLDdkHQXBsEb/20vSnkuty+dCKPs8COal3L2YI3x68hN1K2chHH7UUopgfZacTOFx1o56TdHZ7qnc0= 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=x6v4QXbK; arc=none smtp.client-ip=209.85.218.53 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="x6v4QXbK" Received: by mail-ej1-f53.google.com with SMTP id a640c23a62f3a-a9a0ef5179dso169751066b.1 for ; Thu, 17 Oct 2024 12:40:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1729194011; x=1729798811; 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=QZpms9R5kWODAqigQeGsxMS1uylrcIOwy5W+fcCCNgo=; b=x6v4QXbKoA5p/Qg+ZWFTjQ2TBO7yBb8zMc3BLC0JA3KlC5i3HzOZhpdJuHJlVHLBBd Wtgg+94A+u0Wr88PUAMmjQ/UstZW4GOq+qFqNljO+jXLMt52OC4pAvz7A/9eAnwBeyXF QWaf8WGwqH35H5XidZjcPaOOGPC/D90ldKQ0iAuIHBprBcRmilb2Qra3nKT5lltcZnw/ nHmlNaZwRcv0/fgY93uEK0ovWKA83+qVqy6QKtOPfVBmtvO/xwGRwrDXTZ+uWos5KRab vkCQpY47rz4C5lGJ7tTKizwXzQP0SFbcJXKifaLQ6gO8QN3CnGWVP5J2GnnWSwCsJr1U /DQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729194011; x=1729798811; 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=QZpms9R5kWODAqigQeGsxMS1uylrcIOwy5W+fcCCNgo=; b=sETdRftGo1k35NfS6wkJxmCK6zUCJw6kx6474DX5wOpW1H3rOEVSChLFl0LiuAINYC iNW9rAUUotHE7y28ZrLnX63s2U0/Nnyjq0aSv/PsdSEY5PZ1Ao1qq1+XkFLKxL2DrNtp QLtQiiroApedzLfp9+3JwxKRONiVBiE4iGaDZKRglEyzSEHjyPnPSIDiZk17j0EBI68n SzEi83OyKNv/RARHQu/BP+Ney/CayNbxITL3qyr2euHsNKc4qCXT3F+0xfzImInAZU4X ZTgz5GZ2b6j6EfcYu3n+XHZQSIFNIz1pKhRKhZvH3MpYRpP4bSpZNimtHo1T1WVz++AQ HGJA== X-Forwarded-Encrypted: i=1; AJvYcCWeQxmF3xB7D7RQlq1JjQ7fj1R+f5U7JGUGrZdlWfMYpXCt52bT2+4H2I3qhhtvUnryL8JnbpWGwlDILg==@vger.kernel.org X-Gm-Message-State: AOJu0YxNqNhywIzapSe4bzfnKX6ldT2V/yv7MprqCbjTp5aefUwDZG/0 2mwYH4hiKgdEZU4IqnaahkQTcsb1j2Na6l7n4MThCYwWA6Mcutuaz9MNxBsyiwk= X-Google-Smtp-Source: AGHT+IGxstbOFapOUqQjp3ZRs6n1QMqDvHLOM3P/WHoCxTXHHg04lmOTKj0g3pfWvKqi+rO1wTNiWw== X-Received: by 2002:a17:906:bc23:b0:a99:368d:dad3 with SMTP id a640c23a62f3a-a9a34d078d5mr696337266b.30.1729194011492; Thu, 17 Oct 2024 12:40:11 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9a68bf7037sm2959166b.183.2024.10.17.12.40.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Oct 2024 12:40:10 -0700 (PDT) Date: Thu, 17 Oct 2024 22:40:05 +0300 From: Dan Carpenter To: Ming Qian Cc: Mirela Rabulea , Mauro Carvalho Chehab , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Hans Verkuil , TaoJiang , imx@lists.linux.dev, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH next] media: imx-jpeg: Fix potential error pointer dereference in detach_pm() Message-ID: Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding The proble is on the first line: if (jpeg->pd_dev[i] && !pm_runtime_suspended(jpeg->pd_dev[i])) If jpeg->pd_dev[i] is an error pointer, then passing it to pm_runtime_suspended() will lead to an Oops. The other conditions check for both error pointers and NULL, but it would be more clear to use the IS_ERR_OR_NULL() check for that. Fixes: fd0af4cd35da ("media: imx-jpeg: Ensure power suppliers be suspended before detach them") Signed-off-by: Dan Carpenter --- drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c index d8e946aebba2..918ab12edc9e 100644 --- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c +++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c @@ -2679,11 +2679,12 @@ static void mxc_jpeg_detach_pm_domains(struct mxc_jpeg_dev *jpeg) int i; for (i = 0; i < jpeg->num_domains; i++) { - if (jpeg->pd_dev[i] && !pm_runtime_suspended(jpeg->pd_dev[i])) + if (!IS_ERR_OR_NULL(jpeg->pd_dev[i]) && + !pm_runtime_suspended(jpeg->pd_dev[i])) pm_runtime_force_suspend(jpeg->pd_dev[i]); - if (jpeg->pd_link[i] && !IS_ERR(jpeg->pd_link[i])) + if (!IS_ERR_OR_NULL(jpeg->pd_link[i])) device_link_del(jpeg->pd_link[i]); - if (jpeg->pd_dev[i] && !IS_ERR(jpeg->pd_dev[i])) + if (!IS_ERR_OR_NULL(jpeg->pd_dev[i])) dev_pm_domain_detach(jpeg->pd_dev[i], true); jpeg->pd_dev[i] = NULL; jpeg->pd_link[i] = NULL;