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 6DA8C5218B1; Wed, 30 Sep 2026 17:50:19 +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=1790790620; cv=none; b=ioXwSrQdnwns11ZYQeIvp0lQi6CYOyQz8vkl2/YMuJXvwTiIwNvVtZN/9f1nhgArHZk45bgzI6aeuf5+2vEBtAIylZypAHPQ92kEJlYvJc5HudEq4ngtzz+/Y2dznWmx9LIMeCUVRJQfRSxYojFRb3BOUwGzCNKbyCgdwtE3oc0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790790620; c=relaxed/simple; bh=Xi/acRpE5Gr56TCm1Ifdc8pZSWPIt+PkGkmPZJTD+8M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oMFFcCZXE6A48SM0WN8Dbkc+WahjTgGCYLOVGwasRYjcTo6U5LNPtsL++44Me9JZT99aAIwYqhtbDSIBmeEeAPsRoVYv2Y/nSyOJ5LCZ3iRsLIdlVznEGmFD4lAd2ht4qmjBczc3HhSgGvoHe6rgrAKCsECYcsutU/ltohkJz5I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IB+S+jD9; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IB+S+jD9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8C4D1F000FF; Wed, 30 Sep 2026 17:50:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790790619; bh=vjR6sdVUnoZl/PLUma2CNAQaoLr369g+xU2AWLadj00=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=IB+S+jD90dr/HNSPqY+WPVSY6Z7SPmLexle/f77Y7XjpdIILsCTOFfu/KfO1/X9WF 138nBeeVNZTjYSwhNhSl13Qy64606S/h3kPx6AcbyVRSTe3/o5eUwUMi8K0pN9bXGc hB0h2pe5GnNMosApJOYAxSOy+moFXInvOWlxbd+s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhaoyang Yu <2426767509@qq.com>, Hans Verkuil , Sasha Levin Subject: [PATCH 5.15 016/752] media: dm1105: fix missing error check for dma_alloc_coherent Date: Wed, 30 Sep 2026 17:18:06 +0200 Message-ID: <20260930152358.502711191@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152358.131179731@linuxfoundation.org> References: <20260930152358.131179731@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhaoyang Yu <2426767509@qq.com> [ Upstream commit 3eaac9e02d8591d3c790db572ef1c8fa5a841fdb ] The return value of dm1105_dma_map(), which handles DMA memory allocation, is ignored in dm1105_hw_init(). If dma_alloc_coherent() fails, the driver will proceed using a NULL pointer for DMA transfers, leading to a kernel oops or invalid hardware access. Fix this by checking the return value and propagating -ENOMEM on failure. Signed-off-by: Zhaoyang Yu <2426767509@qq.com> Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/pci/dm1105/dm1105.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/media/pci/dm1105/dm1105.c b/drivers/media/pci/dm1105/dm1105.c index 57f7e4df41b22..f20bea8623af7 100644 --- a/drivers/media/pci/dm1105/dm1105.c +++ b/drivers/media/pci/dm1105/dm1105.c @@ -767,6 +767,8 @@ static void dm1105_ir_exit(struct dm1105_dev *dm1105) static int dm1105_hw_init(struct dm1105_dev *dev) { + int ret; + dm1105_disable_irqs(dev); dm_writeb(DM1105_HOST_CTR, 0); @@ -777,7 +779,10 @@ static int dm1105_hw_init(struct dm1105_dev *dev) dm_writew(DM1105_TSCTR, 0xc10a); /* map DMA and set address */ - dm1105_dma_map(dev); + ret = dm1105_dma_map(dev); + if (ret) + return -ENOMEM; + dm1105_set_dma_addr(dev); /* big buffer */ dm_writel(DM1105_RLEN, 5 * DM1105_DMA_BYTES); -- 2.53.0