Re: [BUG] KASAN: slab-out-of-bounds Write in gb_hid_raw_request

[Greg Kroah-Hartman]

On Wed, Sep 09, 2026 at 06:38:02PM -0700, Farhad Alemi wrote:
> Hello,
> 
> We are reporting the following crash (reproducer and a proposed patch attached):

Great, please submit the patch properly so that we can review and apply
it if it works.

> Linux version 7.3.0-rc2 50d05c7c76c96b90462f24debacca971d2e86713
> Build Config: UpstreamAppArmorKASAN (KASAN + UBSAN, panic_on_warn=1)
> 
> [   44.000772][  T804] usb 3-1: new high-speed USB device number 2
> using dummy_hcd
> [   44.163699][  T804] usb 3-1: New USB device found, idVendor=18d1,
> idProduct=1eaf, bcdDevice= 1.00
> [   44.169786][  T804] usb 3-1: New USB device strings: Mfr=0,
> Product=0, SerialNumber=0
> [   44.212054][   T12] greybus 1-svc: set power mode = 0
> [   44.212064][   T12] greybus 1-svc: power mode change failed on AP
> to switch link: -5
> [   44.213758][    C1] greybus greybus1: 0/0:0: short response 0x94
> received (8 < 9)
> [   44.215179][ T9337] greybus greybus1: 0/0:0: synchronous operation
> id 0x0003 of type 0x14 failed: -90
> [   44.215216][ T9337] greybus 1-svc: failed to get rail count: -90
> [   44.234071][ T9337] greybus 1-2.2: Interface added (greybus)
> [   44.234080][ T9337] greybus 1-2.2: GMP VID=0x00000001, PID=0x00000001
> [   44.234087][ T9337] greybus 1-2.2: DDBL1 Manufacturer=0x00000126,

I'm guessing this is an emulated device, not a real one?

thanks,

greg k-h