From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60076) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1chLtk-0003G5-H5 for qemu-devel@nongnu.org; Fri, 24 Feb 2017 14:51:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1chLtj-00075Y-JB for qemu-devel@nongnu.org; Fri, 24 Feb 2017 14:51:24 -0500 Received: from mx1.redhat.com ([209.132.183.28]:40630) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1chLtj-00074T-DG for qemu-devel@nongnu.org; Fri, 24 Feb 2017 14:51:23 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 90EE44E4D6 for ; Fri, 24 Feb 2017 19:51:22 +0000 (UTC) Date: Fri, 24 Feb 2017 19:51:18 +0000 From: "Dr. David Alan Gilbert" Message-ID: <20170224195117.GR8830@work-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Qemu-devel] make check: crash in vhost-user chardev cleanup List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: marcandre.lureau@redhat.com, qemu-devel@nongnu.org Cc: mst@redhat.com, armbru@redhat.com Hi, I'm seeing a hang+crash doing a make check that looks like it's coming from vhost-user's chardev cleanup, so I'm suspecting your e0b283e7c. The synptom is that the make check hangs in the qtest part, and a dmesg shows that a qemu crashed. I got a backtrace that shows: (gdb) where #0 0x0000560d3344f03e in qemu_chr_fe_read_all (be=be@entry=0x0, buf=buf@entry=0x7ffea7a2f520 "\v", len=len@entry=12) at /home/dgilbert/git/qemu/chardev/char.c:209 #1 0x0000560d33199d64 in vhost_user_read (msg=msg@entry=0x7ffea7a2f520, dev=) at /home/dgilbert/git/qemu/hw/virtio/vhost-user.c:125 #2 0x0000560d3319a11f in vhost_user_get_vring_base (dev=0x560d35a614a0, ring=0x7ffea7a2f670) at /home/dgilbert/git/qemu/hw/virtio/vhost-user.c:417 #3 0x0000560d33196abb in vhost_virtqueue_stop (dev=dev@entry=0x560d35a614a0, vdev=vdev@entry=0x560d3729cc00, vq=0x560d35a61678, idx=1) at /home/dgilbert/git/qemu/hw/virtio/vhost.c:1070 #4 0x0000560d33198cd4 in vhost_dev_stop (hdev=hdev@entry=0x560d35a614a0, vdev=vdev@entry=0x560d3729cc00) at /home/dgilbert/git/qemu/hw/virtio/vhost.c:1533 #5 0x0000560d3317bfd8 in vhost_net_stop_one (net=0x560d35a614a0, dev=0x560d3729cc00) at /home/dgilbert/git/qemu/hw/net/vhost_net.c:288 #6 0x0000560d3317c4aa in vhost_net_stop (dev=dev@entry=0x560d3729cc00, ncs=, total_queues=total_queues@entry=1) at /home/dgilbert/git/qemu/hw/net/vhost_net.c:367 #7 0x0000560d33179201 in virtio_net_vhost_status (status=, n=0x560d3729cc00) at /home/dgilbert/git/qemu/hw/net/virtio-net.c:176 #8 0x0000560d33179201 in virtio_net_set_status (vdev=0x560d3729cc00, status=7 '\a') at /home/dgilbert/git/qemu/hw/net/virtio-net.c:250 #9 0x0000560d3339ce99 in qemu_del_net_client (nc=0x560d35a61250) at /home/dgilbert/git/qemu/net/net.c:390 #10 0x0000560d3339e30d in net_cleanup () at /home/dgilbert/git/qemu/net/net.c:1454 #11 0x0000560d330ee940 in main (argc=, argv=, envp=) at /home/dgilbert/git/qemu/vl.c:4637 (gdb) #0 qemu_chr_fe_read_all (be=be@entry=0x0, buf=buf@entry=0x7ffea7a2f520 "\v", len=len@entry=12) at /home/dgilbert/git/qemu/chardev/char.c:209 209 Chardev *s = be->chr; Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK