netdev - Re: [PATCH net-next] vhost_net: do not stall on zerocopy depletion

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <201710010753.KeY9a5xF%fengguang.wu@intel.com>
Date:   Sun, 1 Oct 2017 08:09:30 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org, davem@...emloft.net,
        mst@...hat.com, jasowang@...hat.com, den@...ipeden.com,
        virtualization@...ts.linux-foundation.org,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH net-next] vhost_net: do not stall on zerocopy depletion

Hi Willem,

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Willem-de-Bruijn/vhost_net-do-not-stall-on-zerocopy-depletion/20171001-054709
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)


vim +440 drivers/vhost/net.c

   433	
   434	static bool vhost_exceeds_maxpend(struct vhost_net *net)
   435	{
   436		struct vhost_net_virtqueue *nvq = &net->vqs[VHOST_NET_VQ_TX];
   437		struct vhost_virtqueue *vq = &nvq->vq;
   438	
   439		return (nvq->upend_idx + UIO_MAXIOV - nvq->done_idx) % UIO_MAXIOV >
 > 440		       min(VHOST_MAX_PEND, vq->num >> 2);
   441	}
   442	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation