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virtio-scsi: don't crash without a valid device 

Make sure that we actually have a device when checking the aio
context. Otherwise guests could trigger QEMU crashes.

Signed-off-by: "Eugene (jno) Dvurechenski" <jno@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Message-Id: <1448549135-6582-2-git-send-email-jno@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Eugene (jno) Dvurechenski 2015-11-26 15:45:35 +01:00 committed by Paolo Bonzini
parent 12a3567c40
commit 3e32e8a96e
1 changed files with 1 additions and 1 deletions
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2
hw/scsi/virtio-scsi.c
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@ -250,7 +250,7 @@ static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
int target;
int ret = 0;
if (s->dataplane_started) {
if (s->dataplane_started && d) {
assert(blk_get_aio_context(d->conf.blk) == s->ctx);
}
/* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */