Red Hat Bugzilla – Bug 972787
qemu segfault when quickly closing virt-manager VM view
Last modified: 2015-02-17 10:31:26 EST
I hit that issue when trying to reproduce https://bugzilla.redhat.com/show_bug.cgi?id=901880 Steps to reproduce: - start virt-manager - double click on a running VM to connect to it (I used a win7 VM) - quickly close it with alt+f4 (make sure the cursor is outside of the VM window so that it's not grabbed) - repeat that 5 to 10 times Result: qemu crashes on a spice-server assert: #0 0x00007f001b9bc819 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00007f001b9bdf28 in __GI_abort () at abort.c:90 #2 0x00007f001c7722dc in spice_logv (log_domain=0x7f001c7e8086 "Spice", log_level=SPICE_LOG_LEVEL_ERROR, strloc=0x7f001c7ebe6c "red_channel.c:1967", function=0x7f001c7ebf50 <__FUNCTION__.22670> "red_client_destroy", format=0x7f001c7e805e "assertion `%s' failed", args=args@entry=0x7fff5fe95db8) at log.c:109 #3 0x00007f001c772428 in spice_log (log_domain=log_domain@entry=0x7f001c7e8086 "Spice", log_level=log_level@entry=SPICE_LOG_LEVEL_ERROR, strloc=strloc@entry=0x7f001c7ebe6c "red_channel.c:1967", function=function@entry=0x7f001c7ebf50 <__FUNCTION__.22670> "red_client_destroy", format=format@entry=0x7f001c7e805e "assertion `%s' failed") at log.c:123 #4 0x00007f001c72f17a in red_client_destroy (client=client@entry=0x7f0023a01490) at red_channel.c:1967 #5 0x00007f001c755255 in reds_client_disconnect (client=0x7f0023a01490) at reds.c:570 #6 0x00007f001c72a441 in red_peer_handle_incoming (handler=0x7f0023ab40e0, stream=0x7f0023a2e9d0) at red_channel.c:300 #7 red_channel_client_receive (rcc=rcc@entry=0x7f0023aaffd0) at red_channel.c:309 #8 0x00007f001c72c2dc in red_channel_client_event (fd=<optimized out>, event=1, data=0x7f0023aaffd0) at red_channel.c:1440 #9 0x00007f00228ce787 in qemu_iohandler_poll (readfds=readfds@entry=0x7f002325f4e0 <rfds>, writefds=writefds@entry=0x7f002325f460 <wfds>, xfds=xfds@entry=0x7f002325f3e0 <xfds>, ret=ret@entry=8) at iohandler.c:159 #10 0x00007f00228d3cde in main_loop_wait (nonblocking=<optimized out>) at main-loop.c:417 #11 0x00007f00227aea55 in main_loop () at vl.c:2001 #12 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4326 #5 corresponds to 'spice_assert(ring_is_empty(&rcc->pipe));'
I saw this already, it's reported I think, maybe similar to something Yonit is working. There is a double free, caused by client destroy happening twice. I don't think I'll get back to it this week so feel free to bug me if I can help you tackle this.
I'm not sure this is a double free here,the structures seem consistent, but rcc->pipe contains one item (type 110, the channel seems to be a display channel, which would correspond to a PIPE_ITEM_TYPE_UPGRADE item (?))
Could this be fixed by the ring remove safeness fixes done recently ?
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
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