@@ -76,6 +76,20 @@ void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype
return NULL;
}
+/* check the validity of pipe and EP types */
+int snd_usb_pipe_sanity_check(struct usb_device *dev, unsigned int pipe)
+{
+ static const int pipetypes[4] = {
+ PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT
+ };
+ struct usb_host_endpoint *ep;
+
+ ep = usb_pipe_endpoint(dev, pipe);
+ if (usb_pipetype(pipe) != pipetypes[usb_endpoint_type(&ep->desc)])
+ return -EINVAL;
+ return 0;
+}
+
/*
* Wrapper for usb_control_msg().
* Allocates a temp buffer to prevent dmaing from/to the stack.
@@ -88,6 +102,9 @@ int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
void *buf = NULL;
int timeout;
+ if (snd_usb_pipe_sanity_check(dev, pipe))
+ return -EINVAL;
+
if (size > 0) {
buf = kmemdup(data, size, GFP_KERNEL);
if (!buf)
@@ -7,6 +7,7 @@ unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
+int snd_usb_pipe_sanity_check(struct usb_device *dev, unsigned int pipe);
int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
__u8 request, __u8 requesttype, __u16 value, __u16 index,
void *data, __u16 size);
@@ -743,11 +743,13 @@ static int snd_usb_novation_boot_quirk(struct usb_device *dev)
static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
{
int err, actual_length;
-
/* "midi send" enable */
static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
+ void *buf;
- void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
+ if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x05)))
+ return -EINVAL;
+ buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
if (!buf)
return -ENOMEM;
err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
@@ -772,7 +774,11 @@ static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
{
- int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ int ret;
+
+ if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
+ return -EINVAL;
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 0, NULL, 0, 1000);
@@ -879,6 +885,8 @@ static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
+ if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
+ return -EINVAL;
/* If the Axe-Fx III has not fully booted, it will timeout when trying
* to enable the audio streaming interface. A more generous timeout is
* used here to detect when the Axe-Fx III has finished booting as the