gentoo/app-emulation/qemu/files/qemu-2.3.0-CVE-2015-5166.patch

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2015-08-04 09:21:57 +02:00
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Fix release_drive on unplugged devices (pci_piix3_xen_ide_unplug)
pci_piix3_xen_ide_unplug should completely unhook the unplugged
IDEDevice from the corresponding BlockBackend, otherwise the next call
to release_drive will try to detach the drive again.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index adb6649..5a26c86 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -169,6 +169,7 @@ int pci_piix3_xen_ide_unplug(DeviceState *dev)
PCIIDEState *pci_ide;
DriveInfo *di;
int i;
+ IDEDevice *idedev;
pci_ide = PCI_IDE(dev);
@@ -181,6 +182,12 @@ int pci_piix3_xen_ide_unplug(DeviceState *dev)
blk_detach_dev(blk, ds);
}
pci_ide->bus[di->bus].ifs[di->unit].blk = NULL;
+ if (!(i % 2)) {
+ idedev = pci_ide->bus[di->bus].master;
+ } else {
+ idedev = pci_ide->bus[di->bus].slave;
+ }
+ idedev->conf.blk = NULL;
blk_unref(blk);
}
}