Hi Xuan, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.6-rc5 next-20231011] [cannot apply to mst-vhost/linux-next] [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_ring-virtqueue_set_dma_premapped-support-disable/20231011-180709 base: linus/master patch link: https://lore.kernel.org/r/20231011092728.105904-6-xuanzhuo%40linux.alibaba.com patch subject: [PATCH vhost 05/22] virtio_net: independent directory config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20231012/202310120705.aR0WPj7m-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231012/202310120705.aR0WPj7m-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310120705.aR0WPj7m-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/net/virtio/main.c: In function 'virtnet_find_vqs': >> drivers/net/virtio/main.c:4091:48: warning: '%d' directive writing between 1 and 11 bytes into a region of size 10 [-Wformat-overflow=] 4091 | sprintf(vi->rq[i].name, "input.%d", i); | ^~ drivers/net/virtio/main.c:4091:41: note: directive argument in the range [-2147483641, 65534] 4091 | sprintf(vi->rq[i].name, "input.%d", i); | ^~~~~~~~~~ drivers/net/virtio/main.c:4091:17: note: 'sprintf' output between 8 and 18 bytes into a destination of size 16 4091 | sprintf(vi->rq[i].name, "input.%d", i); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/virtio/main.c:4092:49: warning: '%d' directive writing between 1 and 11 bytes into a region of size 9 [-Wformat-overflow=] 4092 | sprintf(vi->sq[i].name, "output.%d", i); | ^~ drivers/net/virtio/main.c:4092:41: note: directive argument in the range [-2147483641, 65534] 4092 | sprintf(vi->sq[i].name, "output.%d", i); | ^~~~~~~~~~~ drivers/net/virtio/main.c:4092:17: note: 'sprintf' output between 9 and 19 bytes into a destination of size 16 4092 | sprintf(vi->sq[i].name, "output.%d", i); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +4091 drivers/net/virtio/main.c d85b758f72b05a drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-09 4046 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4047 static int virtnet_find_vqs(struct virtnet_info *vi) 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4048 { 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4049 vq_callback_t **callbacks; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4050 struct virtqueue **vqs; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4051 int ret = -ENOMEM; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4052 int i, total_vqs; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4053 const char **names; d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4054 bool *ctx; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4055 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4056 /* We expect 1 RX virtqueue followed by 1 TX virtqueue, followed by 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4057 * possible N-1 RX/TX queue pairs used in multiqueue mode, followed by 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4058 * possible control vq. 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4059 */ 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4060 total_vqs = vi->max_queue_pairs * 2 + 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4061 virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4062 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4063 /* Allocate space for find_vqs parameters */ 6396bb221514d2 drivers/net/virtio_net.c Kees Cook 2018-06-12 4064 vqs = kcalloc(total_vqs, sizeof(*vqs), GFP_KERNEL); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4065 if (!vqs) 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4066 goto err_vq; 6da2ec56059c3c drivers/net/virtio_net.c Kees Cook 2018-06-12 4067 callbacks = kmalloc_array(total_vqs, sizeof(*callbacks), GFP_KERNEL); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4068 if (!callbacks) 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4069 goto err_callback; 6da2ec56059c3c drivers/net/virtio_net.c Kees Cook 2018-06-12 4070 names = kmalloc_array(total_vqs, sizeof(*names), GFP_KERNEL); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4071 if (!names) 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4072 goto err_names; 192f68cf35f5ee drivers/net/virtio_net.c Jason Wang 2017-07-19 4073 if (!vi->big_packets || vi->mergeable_rx_bufs) { 6396bb221514d2 drivers/net/virtio_net.c Kees Cook 2018-06-12 4074 ctx = kcalloc(total_vqs, sizeof(*ctx), GFP_KERNEL); d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4075 if (!ctx) d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4076 goto err_ctx; d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4077 } else { d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4078 ctx = NULL; d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4079 } 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4080 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4081 /* Parameters for control virtqueue, if any */ 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4082 if (vi->has_cvq) { 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4083 callbacks[total_vqs - 1] = NULL; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4084 names[total_vqs - 1] = "control"; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4085 } 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4086 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4087 /* Allocate/initialize parameters for send/receive virtqueues */ 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4088 for (i = 0; i < vi->max_queue_pairs; i++) { 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4089 callbacks[rxq2vq(i)] = skb_recv_done; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4090 callbacks[txq2vq(i)] = skb_xmit_done; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 @4091 sprintf(vi->rq[i].name, "input.%d", i); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4092 sprintf(vi->sq[i].name, "output.%d", i); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4093 names[rxq2vq(i)] = vi->rq[i].name; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4094 names[txq2vq(i)] = vi->sq[i].name; d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4095 if (ctx) d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4096 ctx[rxq2vq(i)] = true; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4097 } 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4098 2e9ca760c289e1 drivers/net/virtio_net.c Michael S. Tsirkin 2022-08-16 4099 ret = virtio_find_vqs_ctx(vi->vdev, total_vqs, vqs, callbacks, 2e9ca760c289e1 drivers/net/virtio_net.c Michael S. Tsirkin 2022-08-16 4100 names, ctx, NULL); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4101 if (ret) 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4102 goto err_find; 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4103 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4104 if (vi->has_cvq) { 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4105 vi->cvq = vqs[total_vqs - 1]; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4106 if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VLAN)) f646968f8f7c62 drivers/net/virtio_net.c Patrick McHardy 2013-04-19 4107 vi->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4108 } 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4109 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4110 for (i = 0; i < vi->max_queue_pairs; i++) { 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4111 vi->rq[i].vq = vqs[rxq2vq(i)]; d85b758f72b05a drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-09 4112 vi->rq[i].min_buf_len = mergeable_min_buf_len(vi, vi->rq[i].vq); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4113 vi->sq[i].vq = vqs[txq2vq(i)]; 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4114 } 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4115 2fa3c8a8b23041 drivers/net/virtio_net.c Tonghao Zhang 2018-05-31 4116 /* run here: ret == 0. */ 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4117 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4118 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4119 err_find: d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4120 kfree(ctx); d45b897b11eaf9 drivers/net/virtio_net.c Michael S. Tsirkin 2017-03-06 4121 err_ctx: 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4122 kfree(names); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4123 err_names: 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4124 kfree(callbacks); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4125 err_callback: 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4126 kfree(vqs); 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4127 err_vq: 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4128 return ret; 3f9c10b0d478a3 drivers/net/virtio_net.c Amit Shah 2011-12-22 4129 } 986a4f4d452dec drivers/net/virtio_net.c Jason Wang 2012-12-07 4130 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
