From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 95FC2A0350; Tue, 23 Jun 2020 18:58:37 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id F3EF11D6B6; Tue, 23 Jun 2020 18:58:36 +0200 (CEST) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [148.163.129.52]) by dpdk.org (Postfix) with ESMTP id ACF131D6B5 for ; Tue, 23 Jun 2020 18:58:35 +0200 (CEST) Received: from mx1-us1.ppe-hosted.com (unknown [10.7.65.61]) by dispatch1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 025B5600EB; Tue, 23 Jun 2020 16:58:35 +0000 (UTC) Received: from us4-mdac16-25.ut7.mdlocal (unknown [10.7.65.251]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 00CD8800A4; Tue, 23 Jun 2020 16:58:35 +0000 (UTC) X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.7.66.35]) by 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List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 6/23/20 7:41 PM, Ferruh Yigit wrote: > Function 'rte_eth_dma_zone_reserve()' returns an existing memzone based > on name match, but other requested attributes are discarded. > This may cause driver using a memzone with wrong size or alignment. > > Verify size, alignment and socket_id for matched memzone, and do not use > memzone if any one of the attributes are not justified. > > Reported-by: Renata Saiakhova > Signed-off-by: Ferruh Yigit Few minor notes below, other than that: Reviewed-by: Andrew Rybchenko > --- > Cc: Anatoly Burakov > --- > lib/librte_ethdev/rte_ethdev.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c > index 8e10a6fc3..0fe84aadc 100644 > --- a/lib/librte_ethdev/rte_ethdev.c > +++ b/lib/librte_ethdev/rte_ethdev.c > @@ -4202,8 +4202,18 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, const char *ring_name, > } > > mz = rte_memzone_lookup(z_name); > - if (mz) > + if (mz) { > + if ((socket_id != SOCKET_ID_ANY && socket_id != mz->socket_id) || > + size > mz->len || > + (uintptr_t)mz->addr & (align - 1)) { IMHO, it would be a bit more readable if the result compared with 0. Up to you. > + RTE_ETHDEV_LOG(ERR, > + "memzone %s does not justify the requested attributes\n", > + mz->name); > + return NULL; Initially I thought it is a bad behaviour and memzone should be freed and reallocated, but it is even worse (implicit free). May be it is better to highlight it in the description. > + } > + > return mz; > + } > > return rte_memzone_reserve_aligned(z_name, size, socket_id, > RTE_MEMZONE_IOVA_CONTIG, align); >