From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id BAC6A462D5; Thu, 27 Feb 2025 10:16:03 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A909A40671; Thu, 27 Feb 2025 10:16:03 +0100 (CET) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mails.dpdk.org (Postfix) with ESMTP id 69D7B40290 for ; Thu, 27 Feb 2025 10:16:02 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1740647761; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=ImFjwdsaglT5nwQ7CDvdHq8QlVFFe0wSUDJmIfEw2fI=; b=PX2F9vnepVk7X3iEph0bdkXcuEn9BBC7lXqt+ZDzs50jgua/G0AXOHma18mRWQgstRxqA1 QdbmSQ87PEujcqYyzU6Di76TGkmR3HxZzH19dSzzcqMU/fwDf206MFk5X5x5Jk7u3B/tJu dH+mnYw3K8HEIqe64TecvRb0ffhCrpM= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-681-Qypgq1KDONWbxzC5r1Ghww-1; Thu, 27 Feb 2025 04:15:58 -0500 X-MC-Unique: Qypgq1KDONWbxzC5r1Ghww-1 X-Mimecast-MFC-AGG-ID: Qypgq1KDONWbxzC5r1Ghww_1740647756 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6ED6C1800873; Thu, 27 Feb 2025 09:15:56 +0000 (UTC) Received: from [10.45.242.8] (unknown [10.45.242.8]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5730819560AE; Thu, 27 Feb 2025 09:15:53 +0000 (UTC) Message-ID: <81fac570-cdd7-45f7-b209-ce999d5c3d0e@redhat.com> Date: Thu, 27 Feb 2025 10:15:50 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [v6 1/5] vhost: skip crypto op fetch before vring init To: Gowrishankar Muthukrishnan , dev@dpdk.org, Chenbo Xia , Fan Zhang , Jay Zhou Cc: anoobj@marvell.com, Akhil Goyal , stable@dpdk.org References: <0784f44b63f6161ac8716644acfea979704eca39.1740594750.git.gmuthukrishn@marvell.com> From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Hi Gowri, Thanks for the change, but I think there is an issue with the locking, more below: On 2/26/25 7:43 PM, Gowrishankar Muthukrishnan wrote: > Until virtio avail ring is initialized (by VHOST_USER_SET_VRING_ADDR), > worker thread should not try to fetch crypto op, which would lead to > memory fault. > > Fixes: 939066d96563 ("vhost/crypto: add public function implementation") > Cc: stable@dpdk.org > > Signed-off-by: Gowrishankar Muthukrishnan > Acked-by: Akhil Goyal > --- > v6: > - added lock checks. > --- > lib/vhost/vhost_crypto.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/lib/vhost/vhost_crypto.c b/lib/vhost/vhost_crypto.c > index 3dc41a3bd5..d3d13eff07 100644 > --- a/lib/vhost/vhost_crypto.c > +++ b/lib/vhost/vhost_crypto.c > @@ -8,6 +8,7 @@ > #include > #include > > +#include "iotlb.h" > #include "rte_vhost_crypto.h" > #include "vhost.h" > #include "vhost_user.h" > @@ -1580,7 +1581,26 @@ rte_vhost_crypto_fetch_requests(int vid, uint32_t qid, > > vq = dev->virtqueue[qid]; > > + if (unlikely(vq == NULL)) { > + VC_LOG_ERR("Invalid virtqueue %u", qid); > + return 0; > + } > + > + if (unlikely(rte_rwlock_read_trylock(&vq->access_lock) != 0)) > + return 0; > + > + vhost_user_iotlb_rd_lock(vq); > + if (unlikely(!vq->access_ok)) { > + VC_LOG_DBG("Virtqueue %u vrings not yet initialized", qid); > + vhost_user_iotlb_rd_unlock(vq); > + rte_rwlock_read_unlock(&vq->access_lock); > + return 0; > + } > + > avail_idx = *((volatile uint16_t *)&vq->avail->idx); > + vhost_user_iotlb_rd_unlock(vq); > + rte_rwlock_read_unlock(&vq->access_lock); > + You should only unlock at the end of the function, otherwise there is not much protection. > start_idx = vq->last_used_idx; > count = avail_idx - start_idx; > count = RTE_MIN(count, VHOST_CRYPTO_MAX_BURST_SIZE);