[Bug 106084] [CI] igt at .* - BUG kmalloc-2048 (Tainted: G U W ): Poison overwritten

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106084

Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #9 from Martin Peres <martin.peres at free.fr> ---
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_31/fi-ivb-3520m/igt@kms_vblank@pipe-b-ts-continuation-suspend.html

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_33/fi-ivb-3520m/igt@kms_atomic@plane_invalid_params_fence.html

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_33/fi-ivb-3520m/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-a-planes.html(In
reply to Chris Wilson from comment #8)
> commit 44a182b9d17765514fa2b1cc911e4e65134eef93
> Author: Mathias Nyman <mathias.nyman at linux.intel.com>
> Date:   Thu May 3 17:30:07 2018 +0300
> 
>     xhci: Fix use-after-free in xhci_free_virt_device
>     
>     KASAN found a use-after-free in xhci_free_virt_device+0x33b/0x38e
>     where xhci_free_virt_device() sets slot id to 0 if udev exists:
>     if (dev->udev && dev->udev->slot_id)
>             dev->udev->slot_id = 0;
>     
>     dev->udev will be true even if udev is freed because dev->udev is
>     not set to NULL.
>     
>     set dev->udev pointer to NULL in xhci_free_dev()
>     
>     The original patch went to stable so this fix needs to be applied
>     there as well.
>     
>     Fixes: a400efe455f7 ("xhci: zero usb device slot_id member when
> disabling and freeing a xhci slot")

Yep, it seems like it did the trick! Thanks!

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