[ Sasha's backport helper bot ]
Hi,
Found matching upstream commit: b909df18ce2a998afef81d58bbd1a05dc0788c40
Status in newer kernel trees: 6.12.y | Not found 6.11.y | Not found 6.6.y | Not found 6.1.y | Not found 5.15.y | Not found 5.10.y | Not found 5.4.y | Not found 4.19.y | Not found
Note: The patch differs from the upstream commit: --- 1: b909df18ce2a9 ! 1: 8cac602fcdf27 ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices @@ Commit message Cc: stable@kernel.org Link: https://patch.msgid.link/20241120124144.3814457-1-bsevens@google.com Signed-off-by: Takashi Iwai tiwai@suse.de + (cherry picked from commit b909df18ce2a998afef81d58bbd1a05dc0788c40) + Signed-off-by: Benoît Sevens bsevens@google.com
## sound/usb/quirks.c ## @@ sound/usb/quirks.c: int snd_usb_create_quirk(struct snd_usb_audio *chip, @@ sound/usb/quirks.c: static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
err = usb_reset_configuration(dev); if (err < 0) -@@ sound/usb/quirks.c: static void mbox3_setup_defaults(struct usb_device *dev) - static int snd_usb_mbox3_boot_quirk(struct usb_device *dev) - { - struct usb_host_config *config = dev->actconfig; -+ struct usb_device_descriptor new_device_descriptor; - int err; - int descriptor_size; - -@@ sound/usb/quirks.c: static int snd_usb_mbox3_boot_quirk(struct usb_device *dev) - dev_dbg(&dev->dev, "MBOX3: device initialised!\n"); - - err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, -- &dev->descriptor, sizeof(dev->descriptor)); -- config = dev->actconfig; -+ &new_device_descriptor, sizeof(new_device_descriptor)); - if (err < 0) - dev_dbg(&dev->dev, "MBOX3: error usb_get_descriptor: %d\n", err); -+ if (new_device_descriptor.bNumConfigurations > dev->descriptor.bNumConfigurations) -+ dev_dbg(&dev->dev, "MBOX3: error too large bNumConfigurations: %d\n", -+ new_device_descriptor.bNumConfigurations); -+ else -+ memcpy(&dev->descriptor, &new_device_descriptor, sizeof(dev->descriptor)); - - err = usb_reset_configuration(dev); - if (err < 0) ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-4.19.y | Success | Success |