Looking at the oops it seems that the stack gets corrupted inside
elantech_change_report_id(), that is defined in
drivers/input/mouse/elantech.c.
According to Stephan it seems that 5.11 is the last kernel that seems to
work.
If we look at the changes between 5.11 and 5.13 that are touching
drivers/input/mouse/elantech.c there's only one commit:
9d383e96448dbfdd97a37e618f6af5a17a60ce0d ("Input: elantech - Prepare a
complete software node for the device")
It'd be interesting to revert this commit in the latest 5.13 and see if
the problem goes away.
I'll prepare a test kernel later (if you haven't done it already).
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https://bugs.launchpad.net/bugs/1945590
Title:
Thinkpad E14 Gen2: Kernel panic with trackpad and trackpoint enabled
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