Re: [libvirt] [PATCH] qemu: Fix crash on failed VM startup
On Tue, Jun 01, 2010 at 03:10:19PM -0400, Cole Robinson wrote:
If VM startup fails early enough (can't find a referenced USB
device),
libvirtd will crash trying to clear the VNC port bit, since port = 0,
which overflows us out of the bitmap bounds.
Why is port '0' in the first place ? Don't we always have it
initialized to '-1' when autoport is true.
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index c8cd50a..f5a1310 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3741,7 +3741,7 @@ retry:
if ((vm->def->ngraphics == 1) &&
vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC &&
vm->def->graphics[0]->data.vnc.autoport &&
- vm->def->graphics[0]->data.vnc.port != -1) {
+ vm->def->graphics[0]->data.vnc.port >= QEMU_VNC_PORT_MIN) {
if (virBitmapClearBit(driver->reservedVNCPorts,
vm->def->graphics[0]->data.vnc.port - \
QEMU_VNC_PORT_MIN) < 0) {
Daniel
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