[kbuild-all] drivers/vhost/net.c:1010 vhost_net_rx_peek_head_len() error: double unlocked 'sk->sk_receive_queue.lock' (orig line 1002)

Hi Jason, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 449dc8c97089a6e09fb2dac4d92b1b7ac0eb7c1e commit: 20c384f1ea1a0bc7320bc445c72dd02d2970d594 vhost: refine vhost and vringh kconfig date: 4 months ago config: arm-randconfig-m031-20200808 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; New smatch warnings: drivers/vhost/net.c:1010 vhost_net_rx_peek_head_len() error: double unlocked 'sk->sk_receive_queue.lock' (orig line 1002) drivers/vhost/net.c:1010 vhost_net_rx_peek_head_len() error: double unlocked 'sk->sk_receive_queue.lock' (orig line 1002) Old smatch warnings: drivers/vhost/net.c:1528 vhost_net_set_backend() warn: passing a valid pointer to 'PTR_ERR' vim +1010 drivers/vhost/net.c 8dd014adfea6f17 David Stevens 2010-07-27 994 be294a51adfc1e1 Toshiaki Makita 2018-07-03 995 static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk, be294a51adfc1e1 Toshiaki Makita 2018-07-03 996 bool *busyloop_intr) 030881372460654 Jason Wang 2016-03-04 997 { 28b9b33b983f4de Toshiaki Makita 2018-07-03 998 struct vhost_net_virtqueue *rnvq = &net->vqs[VHOST_NET_VQ_RX]; 28b9b33b983f4de Toshiaki Makita 2018-07-03 999 struct vhost_net_virtqueue *tnvq = &net->vqs[VHOST_NET_VQ_TX]; 6369fec5be0aad4 Toshiaki Makita 2018-07-03 1000 struct vhost_virtqueue *rvq = &rnvq->vq; 28b9b33b983f4de Toshiaki Makita 2018-07-03 1001 struct vhost_virtqueue *tvq = &tnvq->vq; 28b9b33b983f4de Toshiaki Makita 2018-07-03 @1002 int len = peek_head_len(rnvq, sk); 030881372460654 Jason Wang 2016-03-04 1003 dc151282bbdaed0 Tonghao Zhang 2018-09-25 1004 if (!len && rvq->busyloop_timeout) { f5a4941aa6d190e Jason Wang 2018-05-29 1005 /* Flush batched heads first */ 09c3248938c3e3b Jason Wang 2018-07-20 1006 vhost_net_signal_used(rnvq); 030881372460654 Jason Wang 2016-03-04 1007 /* Both tx vq and rx socket were polled here */ dc151282bbdaed0 Tonghao Zhang 2018-09-25 1008 vhost_net_busy_poll(net, rvq, tvq, busyloop_intr, true); 030881372460654 Jason Wang 2016-03-04 1009 28b9b33b983f4de Toshiaki Makita 2018-07-03 @1010 len = peek_head_len(rnvq, sk); 030881372460654 Jason Wang 2016-03-04 1011 } 030881372460654 Jason Wang 2016-03-04 1012 030881372460654 Jason Wang 2016-03-04 1013 return len; 030881372460654 Jason Wang 2016-03-04 1014 } 030881372460654 Jason Wang 2016-03-04 1015 :::::: The code at line 1010 was first introduced by commit :::::: 28b9b33b983f4de3ce9e660e3efe1e08adabf779 vhost_net: Rename local variables in vhost_net_rx_peek_head_len :::::: TO: Toshiaki Makita <makita.toshiaki(a)lab.ntt.co.jp&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org