44 lines
1.6 KiB
Diff
44 lines
1.6 KiB
Diff
From 7c0aea40a3318d914d791f23a85d0c488cae60fe Mon Sep 17 00:00:00 2001
|
|
From: Paolo Bonzini <pbonzini@redhat.com>
|
|
Date: Fri, 23 Nov 2012 16:56:18 +0100
|
|
Subject: [PATCH] hmp: do not crash on invalid SCSI hotplug
|
|
|
|
Commit 0d93692 (qdev: Convert busses to QEMU Object Model, 2012-05-02)
|
|
removed a check on the type of the bus where a SCSI disk is hotplugged.
|
|
However, hot-plugging to the wrong kind of device now causes a crash
|
|
due to either a NULL pointer dereference (avoided by the previous patch)
|
|
or a failed QOM cast.
|
|
|
|
Instead, in this case we need to use object_dynamic_cast and check for
|
|
the result, similar to what was done before that commit.
|
|
|
|
Reported-by: Markus Armbruster <armbru@redhat.com>
|
|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
|
|
(cherry picked from commit b5007bcc9729acd995518c52eb1038c4d8416b5d)
|
|
|
|
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
---
|
|
hw/pci-hotplug.c | 8 +++++++-
|
|
1 file changed, 7 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
|
|
index e7fb780..0ca5546 100644
|
|
--- a/hw/pci-hotplug.c
|
|
+++ b/hw/pci-hotplug.c
|
|
@@ -80,7 +80,13 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
|
|
SCSIBus *scsibus;
|
|
SCSIDevice *scsidev;
|
|
|
|
- scsibus = SCSI_BUS(QLIST_FIRST(&adapter->child_bus));
|
|
+ scsibus = (SCSIBus *)
|
|
+ object_dynamic_cast(OBJECT(QLIST_FIRST(&adapter->child_bus)),
|
|
+ TYPE_SCSI_BUS);
|
|
+ if (!scsibus) {
|
|
+ error_report("Device is not a SCSI adapter");
|
|
+ return -1;
|
|
+ }
|
|
|
|
/*
|
|
* drive_init() tries to find a default for dinfo->unit. Doesn't
|