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Date: Sat, 18 Oct 2014 21:51:43 +0200
From: Stefan Priebe <s.priebe@profihost.ag>
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Subject: [Qemu-devel] kvm segfault in iov_to_buf / virtio_scsi_parse_req
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To: qemu-devel <qemu-devel@nongnu.org>

Hi,

while migrating a bunch of VMs i saw multiple times segaults with qemu 
2.1.2.

Is this a known bug?

Full backtrace:
Program terminated with signal 11, Segmentation fault.
#0  0x00007ff9c73bca90 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0  0x00007ff9c73bca90 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ff9cde46b8e in iov_to_buf (iov=0x7ff9b805c0b0, iov_cnt=1, 
offset=0, buf=0x7ff9b8060118, bytes=51) at util/iov.c:49
#2  0x00007ff9cdacdc56 in virtio_scsi_parse_req (req=0x7ff9b8054090, 
req_size=51, resp_size=108)
     at qemu-kvm/hw/scsi/virtio-scsi.c:140
#3  0x00007ff9cdace060 in virtio_scsi_load_request (f=0x7ff9b803b620, 
sreq=0x7ff9b8089550)
     at qemu-kvm/hw/scsi/virtio-scsi.c:215
#4  0x00007ff9cdcf5737 in get_scsi_requests (f=0x7ff9b803b620, 
pv=0x7ff9cfe4a440, size=0) at hw/scsi/scsi-bus.c:1875
#5  0x00007ff9cdb76e0c in vmstate_load_state (f=0x7ff9b803b620, 
vmsd=0x7ff9ce24cac0, opaque=0x7ff9cfe4a440, version_id=1)
     at vmstate.c:105
#6  0x00007ff9cdb76de8 in vmstate_load_state (f=0x7ff9b803b620, 
vmsd=0x7ff9ce24c500, opaque=0x7ff9cfe4a440, version_id=1)
     at vmstate.c:102
#7  0x00007ff9cda935b6 in vmstate_load (f=0x7ff9b803b620, 
se=0x7ff9cfe95570, version_id=1)
     at qemu-kvm/savevm.c:572
#8  0x00007ff9cda94652 in qemu_loadvm_state (f=0x7ff9b803b620)
     at qemu-kvm/savevm.c:951
#9  0x00007ff9cdb748bd in process_incoming_migration_co 
(opaque=0x7ff9b803b620) at migration.c:97
#10 0x00007ff9cdddb433 in coroutine_trampoline (i0=-1207852976, 
i1=32761) at coroutine-ucontext.c:118
#11 0x00007ff9c72dbd10 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#12 0x00007fff5e55a830 in ?? ()
#13 0x0000000000000000 in ?? ()

Stefan