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staging: unisys: use after free in error messages

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We dereference "bus" when we report the error so we have to move the
kfree() down a couple lines.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2014-04-10 12:36:13 +03:00 committed by Greg Kroah-Hartman
parent ef35a4f44b
commit d21bb45081
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/unisys/uislib/uislib.c
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@ -381,17 +381,17 @@ create_bus(CONTROLVM_MESSAGE *msg, char *buf)
cmd.add_vbus.busTypeGuid = msg->cmd.createBus.busDataTypeGuid;
cmd.add_vbus.busInstGuid = msg->cmd.createBus.busInstGuid;
if (!VirtControlChanFunc) {
kfree(bus);
LOGERR("CONTROLVM_BUS_CREATE Failed: virtpci callback not registered.");
POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->busNo,
POSTCODE_SEVERITY_ERR);
kfree(bus);
return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE;
}
if (!VirtControlChanFunc(&cmd)) {
kfree(bus);
LOGERR("CONTROLVM_BUS_CREATE Failed: virtpci GUEST_ADD_VBUS returned error.");
POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->busNo,
POSTCODE_SEVERITY_ERR);
kfree(bus);
return
CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR;
}