From nobody Thu Dec 25 08:37:34 2025 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 846C95395; Thu, 18 Jan 2024 03:31:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705548666; cv=none; b=YidWzbyWPNH/ROd4hphopF5+jtS5NE73D+UcPrrvcEiGyL9LmZ+KWNvzcwcH5EnNh9bHEtG6ApCkG2C8WPTZ60hMBZ5kokoP2HjKgxNBWkH736QpAPGbKuOl5qL7jbjM0g+J5zRPQQYlkuYTwf8Z852kItnON/Ybb6HUtdKiqMs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705548666; c=relaxed/simple; bh=1uEZ/UjPZ+qsSZH6ZfSum6cH3GHywfS22FKTLNF3V9A=; h=X-UUID:X-CID-P-RULE:X-CID-O-INFO:X-CID-INFO:X-CID-META:X-CID-BVR: X-CID-BAS:X-CID-FACTOR:X-UUID:Received:Received:X-ns-mid:Received: From:To:Cc:Subject:Date:Message-Id:X-Mailer:MIME-Version: Content-Transfer-Encoding; b=uYaNw3Tc8zwYfksvX5EHelJGoTE5JRzm2FKdPD98qI/t9z9NCTAUhBkYZS09zoNYyjf/66JkouhQtd+JU9x/v2Vu17Lz7CWsXUwGGRe3G8iAh9y40P+W6gvv3AERBUZLpwdXMqvV1ljO6HwMN+ZImqzVsWKXJh0RqFXrYU9n8U8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: f032b4793c81426a8679b14033fbc4b5-20240118 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:9d484e5d-084f-4503-8daf-18a4a4bf525b,IP:10, URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-10 X-CID-INFO: VERSION:1.1.35,REQID:9d484e5d-084f-4503-8daf-18a4a4bf525b,IP:10,UR L:0,TC:0,Content:-5,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-10 X-CID-META: VersionHash:5d391d7,CLOUDID:928f4a2f-1ab8-4133-9780-81938111c800,B ulkID:240118113055HYPNW513,BulkQuantity:0,Recheck:0,SF:19|44|66|24|17|102, TC:nil,Content:0,EDM:-3,IP:-2,URL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 ,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI X-UUID: f032b4793c81426a8679b14033fbc4b5-20240118 Received: from mail.kylinos.cn [(39.156.73.10)] by mailgw (envelope-from ) (Generic MTA) with ESMTP id 28929864; Thu, 18 Jan 2024 11:30:54 +0800 Received: from mail.kylinos.cn (localhost [127.0.0.1]) by mail.kylinos.cn (NSMail) with SMTP id 29849E000EB9; Thu, 18 Jan 2024 11:30:54 +0800 (CST) X-ns-mid: postfix-65A89B6D-894983688 Received: from kernel.. (unknown [172.20.15.234]) by mail.kylinos.cn (NSMail) with ESMTPA id AA663E000EB9; Thu, 18 Jan 2024 11:30:53 +0800 (CST) From: Kunwu Chan To: vkoul@kernel.org Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, Kunwu Chan Subject: [PATCH] dmaengine: Add a null pointer check to the dma_request_chan Date: Thu, 18 Jan 2024 11:30:52 +0800 Message-Id: <20240118033052.193282-1-chentao@kylinos.cn> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. Ensure the allocation was successful by checking the pointer validity. Signed-off-by: Kunwu Chan --- drivers/dma/dmaengine.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 491b22240221..a6f808d13aa4 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -856,6 +856,8 @@ struct dma_chan *dma_request_chan(struct device *dev, c= onst char *name) #ifdef CONFIG_DEBUG_FS chan->dbg_client_name =3D kasprintf(GFP_KERNEL, "%s:%s", dev_name(dev), name); + if (!chan->dbg_client_name) + return chan; #endif =20 chan->name =3D kasprintf(GFP_KERNEL, "dma:%s", name); --=20 2.39.2