mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-06 08:46:46 +00:00
Code Issues Releases Wiki Activity

USB: gadget: validate interface OS descriptor requests

Browse source 
Stall the control endpoint in case provided index exceeds array size of
MAX_CONFIG_INTERFACES or when the retrieved function pointer is null.

Signed-off-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Szymon Heidrich 2022-01-24 12:14:00 +01:00 committed by Greg Kroah-Hartman
parent c853685d11
commit 75e5b4849b
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/usb/gadget/composite.c
View file

@ -1988,6 +1988,9 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
if (w_index != 0x5 || (w_value >> 8))
break;
interface = w_value & 0xFF;
if (interface >= MAX_CONFIG_INTERFACES ||
!os_desc_cfg->interface[interface])
break;
buf[6] = w_index;
count = count_ext_prop(os_desc_cfg,
interface);