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usb: fix some memory allocation issues (CVE-2021-3527).

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usb: add stubs, allow building without usb subsystem.
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Merge remote-tracking branch 'remotes/kraxel/tags/usb-20210505-pull-request' into staging

usb: fix some memory allocation issues (CVE-2021-3527).
usb: add stubs, allow building without usb subsystem.

# gpg: Signature made Wed 05 May 2021 14:07:02 BST
# gpg:                using RSA key A0328CFFB93A17A79901FE7D4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/usb-20210505-pull-request:
  usb: limit combined packets to 1 MiB (CVE-2021-3527)
  usb/mtp: avoid dynamic stack allocation
  usb/redir: avoid dynamic stack allocation (CVE-2021-3527)
  usb/hid: avoid dynamic stack allocation
  hw/usb: Do not build USB subsystem if not required
  hw/usb/host-stub: Remove unused header

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2021-05-10 19:55:06 +01:00
commit e4f3ede95c
10 changed files with 40 additions and 14 deletions
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1
stubs/meson.build
View file

@ -50,6 +50,7 @@ if have_block
endif
if have_system
stub_ss.add(files('semihost.c'))
stub_ss.add(files('usb-dev-stub.c'))
stub_ss.add(files('xen-hw-stub.c'))
else
stub_ss.add(files('qdev.c'))

25
stubs/usb-dev-stub.c Normal file
View file

@ -0,0 +1,25 @@
/*
* QEMU USB device emulation stubs
*
* Copyright (C) 2021 Philippe Mathieu-Daudé <f4bug@amsat.org>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "sysemu/sysemu.h"
#include "monitor/monitor.h"
#include "hw/usb.h"
USBDevice *usbdevice_create(const char *driver)
{
error_report("Support for USB devices not built-in");
return NULL;
}
void hmp_info_usb(Monitor *mon, const QDict *qdict)
{
monitor_printf(mon, "Support for USB devices not built-in\n");
}