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[Qemu-devel] [PATCH 5/7] usb-linux: Refuse iso packets when max packet s
From: |
Hans de Goede |
Subject: |
[Qemu-devel] [PATCH 5/7] usb-linux: Refuse iso packets when max packet size is 0 (alt setting 0) |
Date: |
Fri, 26 Nov 2010 19:13:21 +0100 |
Refuse iso usb packets when then max packet size for the endpoint is 0,
this avoids an abort in usb_host_alloc_iso() caused by trying to qemu_malloc
a 0 bytes large buffer.
---
usb-linux.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/usb-linux.c b/usb-linux.c
index 8513ace..5a979bd 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -548,7 +548,11 @@ static int urb_status_to_usb_ret(int status)
static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p)
{
AsyncURB *aurb;
- int i, j, ret, len = 0;
+ int i, j, ret, max_packet_size, len = 0;
+
+ max_packet_size = get_max_packet_size(s, p->devep);
+ if (max_packet_size == 0)
+ return USB_RET_NAK;
aurb = get_iso_urb(s, p->devep);
if (!aurb) {
--
1.7.3.2
- [Qemu-devel] [PATCH 1/7] usb-linux: introduce a usb_linux_alt_setting function, Hans de Goede, 2010/11/26
- [Qemu-devel] [PATCH 2/7] usb-linux: Get the alt. setting from sysfs rather then asking the dev, Hans de Goede, 2010/11/26
- [Qemu-devel] [PATCH 3/7] usb-linux: Add support for buffering iso usb packets, Hans de Goede, 2010/11/26
- [Qemu-devel] [PATCH 4/7] usb-linux: Refuse packets for endpoints which are not in the usb descriptor, Hans de Goede, 2010/11/26
- [Qemu-devel] [PATCH 5/7] usb-linux: Refuse iso packets when max packet size is 0 (alt setting 0),
Hans de Goede <=
- [Qemu-devel] [PATCH 6/7] usb-linux: We only need to keep track of 15 endpoints, Hans de Goede, 2010/11/26
- [Qemu-devel] [PATCH 7/7] usb-linux: Add support for buffering iso out usb packets, Hans de Goede, 2010/11/26