UPSTREAM: ALSA: usb-audio: Fix a DMA to stack memory bug

commit f7d306b47a24367302bd4fe846854e07752ffcd9 upstream.

The usb_get_descriptor() function does DMA so we're not allowed
to use a stack buffer for that.  Doing DMA to the stack is not portable
all architectures.  Move the "new_device_descriptor" from being stored
on the stack and allocate it with kmalloc() instead.

Bug: 382243530
Fixes: b909df18ce2a ("ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices")
Cc: stable@kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/60e3aa09-039d-46d2-934c-6f123026c2eb@stanley.mountain


Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Benoît Sevens <bsevens@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 4e54dc4bbc602133217de301d9f814f3e6d22eee)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I469212aa538584e3d8cc5b0087b68c99acf43f64