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[Qemu-devel] Crash with odd chardev setup
From: |
Dr. David Alan Gilbert |
Subject: |
[Qemu-devel] Crash with odd chardev setup |
Date: |
Wed, 25 Oct 2017 19:00:14 +0100 |
User-agent: |
Mutt/1.9.1 (2017-09-22) |
Hi Dan,
I've got a crash in head (and 2.10) which is a bit of a heisenbug;
I can trigger it with:
./qemu-system-x86_64 -netdev tap,id=hostnet0,vhost=on,fd=10 -chardev
socket,id=charchannel0,path=/tmp/org.qemu.guest_agent.0,server,nowait -monitor
stdio -vnc :0
and then 'q' to quit.
Note I'm not doing a redirect in of fd 10.
It goes away if I remove either the -netdev or the -chardev option.
It doesn't trigger under gdb, but fortunately we get a core:
#0 0x000055a226d94a2e in socket_listen_cleanup (fd=<optimized out>,
address@hidden)
at /root/qemu/util/qemu-sockets.c:1077
1077 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX
1078 && addr->u.q_unix.path) {
1079 if (unlink(addr->u.q_unix.path) < 0 && errno != ENOENT)
{
#1 0x000055a226d4242b in qio_channel_socket_finalize (obj=<optimized out>) at
/root/qemu/io/channel-socket.c:388
#2 0x000055a226cbca92 in object_unref (type=<optimized out>,
obj=0x55a2290ab400) at /root/qemu/qom/object.c:462
#3 0x000055a226cbca92 in object_unref (data=0x55a2290ab400) at
/root/qemu/qom/object.c:476
#4 0x000055a226cbca92 in object_unref (obj=0x55a2290ab400) at
/root/qemu/qom/object.c:911
#5 0x000055a226d334c9 in char_socket_finalize (obj=<optimized out>) at
/root/qemu/chardev/char-socket.c:805
#6 0x000055a226cbca92 in object_unref (type=<optimized out>,
obj=0x55a2290aa7f0) at /root/qemu/qom/object.c:462
#7 0x000055a226cbca92 in object_unref (data=0x55a2290aa7f0) at
/root/qemu/qom/object.c:476
#8 0x000055a226cbca92 in object_unref (obj=0x55a2290aa7f0) at
/root/qemu/qom/object.c:911
#9 0x000055a226cbcacc in object_unref (obj=0x55a2290ab7a0) at
/root/qemu/qom/object.c:413
#10 0x000055a226cbcacc in object_unref (data=0x55a2290ab7a0) at
/root/qemu/qom/object.c:475
#11 0x000055a226cbcacc in object_unref (obj=0x55a2290ab7a0) at
/root/qemu/qom/object.c:911
#12 0x000055a226cbba87 in object_property_del_child (obj=0x55a22909e770,
child=0x55a2290ab7a0, errp=0x0)
at /root/qemu/qom/object.c:436
#13 0x000055a226cbc2e4 in object_unparent (obj=<optimized out>) at
/root/qemu/qom/object.c:455
#14 0x000055a226d2e7e5 in qemu_chr_cleanup () at /root/qemu/chardev/char.c:1090
#15 0x000055a2269c73ff in main (argc=<optimized out>, argv=<optimized out>,
envp=<optimized out>)
at /root/qemu/vl.c:4914
Dave
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK
- [Qemu-devel] Crash with odd chardev setup,
Dr. David Alan Gilbert <=