From patchwork Mon Apr 7 11:50:49 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiangsheng Hou X-Patchwork-Id: 14040318 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (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 92AE42500DE; Mon, 7 Apr 2025 11:51:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744026683; cv=none; b=X375KtUo7aOgOE6hkKCSn5jkAo67oYlQvEVhL0PIM8wIamBl4ym/r2wbNdnM1jvr3GFrrpiuNaRu+9IuIGkkIE13PTZc2XRpZiEs6mHYyU0lCcZEyhoV5hA17+LEL4W36p9GCcrcQXUaedIy9PWTu3uZwXsDoeGZ8bFK3gkJvkM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744026683; c=relaxed/simple; bh=xgUKmB5vq2YP9FDOVVqsqudMWRIqV09YtHQN0uX6tfI=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Y2CEUlbvjr07kQX2Pu/sSD+3J8KSCuSEkyJH9e4P1YlRMtzO153F0qExvEPtkDWd9UCTbga5SX8qWXVH1yxNUu+9knTRWjb0v0Sdgg4w2goup6v8InQg5chWHpcTiIKmAFwrNBD87YicMQ3pUDyqE6Sn+n2aMYdgL3UdsClcYt8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=dkDo2ljr; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="dkDo2ljr" X-UUID: 9ba92ac613a611f0aae1fd9735fae912-20250407 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=tkF2DYghDX+VQfWwEAkZ56brYwDEfPo9ZbyXaVQNw8w=; b=dkDo2ljr/sjlsjNlGfkK7xnllS11m7EAELVbxF48MOdpRgeY5+FB9Tr3LWl50hEl09m6Tpr1kBlybpkQskkhlue4E/XCDUnM6izu49IRQx4vahYZxZwz3ZYBm8eTN782/aTlXF8IRD5Msts73jgYOYZpiRWWWPrEz2rXGy7xFcc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.2.1,REQID:ff118d3f-26b2-4ad9-b2dd-4d96e9e9d256,IP:0,UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:r elease,TS:0 X-CID-META: VersionHash:0ef645f,CLOUDID:fff2c6a5-c619-47e3-a41b-90eedbf5b947,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0|50,EDM:-3,IP:ni l,URL:0,File:nil,RT: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,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 9ba92ac613a611f0aae1fd9735fae912-20250407 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2082688227; Mon, 07 Apr 2025 19:51:14 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.39; Mon, 7 Apr 2025 19:51:13 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1258.39 via Frontend Transport; Mon, 7 Apr 2025 19:51:13 +0800 From: Xiangsheng Hou To: Vivek Goyal , Stefan Hajnoczi , Miklos Szeredi , , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , , Xiangsheng Hou Subject: [RESEND] virtiofs: add filesystem context source name check Date: Mon, 7 Apr 2025 19:50:49 +0800 Message-ID: <20250407115111.25535-1-xiangsheng.hou@mediatek.com> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N In certain scenarios, for example, during fuzz testing, the source name may be NULL, which could lead to a kernel panic. Therefore, an extra check for the source name should be added. Signed-off-by: Xiangsheng Hou Acked-by: Miklos Szeredi --- fs/fuse/virtio_fs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index 2c7b24cb67ad..53c2626e90e7 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -1669,6 +1669,9 @@ static int virtio_fs_get_tree(struct fs_context *fsc) unsigned int virtqueue_size; int err = -EIO; + if (!fsc->source) + return invalf(fsc, "No source specified"); + /* This gets a reference on virtio_fs object. This ptr gets installed * in fc->iq->priv. Once fuse_conn is going away, it calls ->put() * to drop the reference to this object.