Re: [Linux-kernel-mentees] [PATCH v2 RESEND] usbhid: Fix slab-out-of-bounds write in hiddev_ioctl_usage()

On Wed, 29 Jul 2020, Peilin Ye wrote:

`uref->usage_index` is not always being properly checked, causing
hiddev_ioctl_usage() to go out of bounds under some cases. Fix it.

Reported-by: syzbot+34ee1b45d88571c2fa8b@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=f2aebe90b8c56806b050a20b36f51ed6acabe802
Reviewed-by: Dan Carpenter <redacted>
Signed-off-by: Peilin Ye <redacted>
---
Change in v2:
    - Add the same check for the `HIDIOCGUSAGE` case. (Suggested by
      Dan Carpenter [off-list ref])

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs