ACK: [SRU][I][PATCH 0/1] Fix kernel panic at boot on Thinkpad E14 Gen2 (elantech driver)
Tim Gardner
tim.gardner at canonical.com
Tue Nov 30 16:02:36 UTC 2021
Acked-by: Tim Gardner <tim.gardner at canonical.com>
On 11/30/21 8:56 AM, Andrea Righi wrote:
> BugLink: https://bugs.launchpad.net/bugs/1945590
>
> [Impact]
>
> On some thinkpads we may get a kernel panic at boot, because the
> elantech driver (trakcpad) can trigger out-of-bounds access in the
> stack.
>
> [Test case]
>
> Simply boot the kernel on one of the affected systems (e.g., Thinkpad
> E14 Gen2).
>
> [Fix]
>
> Prevent the stack out of bound access by applying the following upstream
> commit (from linux-next):
>
> 1d72d9f960cc ("Input: elantech - fix stack out of bound access in elantech_change_report_id()")
>
> [Regression potential]
>
> The fix is touching the elantech driver, so we could only see
> regressions with this specific trackpad/mouse driver.
>
>
--
-----------
Tim Gardner
Canonical, Inc
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