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Message-ID: <202312300404.1R72Ssbh-lkp@intel.com>
Date: Sat, 30 Dec 2023 05:03:30 +0800
From: kernel test robot <lkp@...el.com>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org
Subject: Re: [PATCH net-next v3 23/27] virtio_net: xsk: rx: support recv
merge mode
Hi Xuan,
kernel test robot noticed the following build warnings:
[auto build test WARNING on mst-vhost/linux-next]
[cannot apply to net-next/main linus/master horms-ipvs/master v6.7-rc7 next-20231222]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Xuan-Zhuo/virtio_net-rename-free_old_xmit_skbs-to-free_old_xmit/20231229-155253
base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
patch link: https://lore.kernel.org/r/20231229073108.57778-24-xuanzhuo%40linux.alibaba.com
patch subject: [PATCH net-next v3 23/27] virtio_net: xsk: rx: support recv merge mode
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20231230/202312300404.1R72Ssbh-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231230/202312300404.1R72Ssbh-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312300404.1R72Ssbh-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/net/virtio/xsk.c:216:17: warning: variable 'xdp' is uninitialized when used here [-Wuninitialized]
216 | xsk_buff_free(xdp);
| ^~~
drivers/net/virtio/xsk.c:210:22: note: initialize the variable 'xdp' to silence this warning
210 | struct xdp_buff *xdp;
| ^
| = NULL
1 warning generated.
vim +/xdp +216 drivers/net/virtio/xsk.c
202
203 struct sk_buff *virtnet_receive_xsk_buf(struct virtnet_info *vi, struct virtnet_rq *rq,
204 void *buf, u32 len,
205 unsigned int *xdp_xmit,
206 struct virtnet_rq_stats *stats)
207 {
208 struct net_device *dev = vi->dev;
209 struct sk_buff *skb = NULL;
210 struct xdp_buff *xdp;
211
212 if (unlikely(len < vi->hdr_len + ETH_HLEN)) {
213 pr_debug("%s: short packet %i\n", dev->name, len);
214 DEV_STATS_INC(dev, rx_length_errors);
215
> 216 xsk_buff_free(xdp);
217 return NULL;
218 }
219
220 len -= vi->hdr_len;
221
222 u64_stats_add(&stats->bytes, len);
223
224 xdp = buf_to_xdp(vi, rq, buf, len);
225 if (!xdp)
226 return NULL;
227
228 if (vi->mergeable_rx_bufs)
229 skb = virtnet_receive_xsk_merge(dev, vi, rq, xdp, xdp_xmit, stats);
230
231 return skb;
232 }
233
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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