[Bug 220772] NULL pointer dereference in bmc150-accel-core

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220772

--- Comment #2 from Jonathan Cameron (jic23@kernel.org) ---
On Sun, 09 Nov 2025 19:59:38 +0000
bugzilla-daemon@kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=220772
> 
> Alon Ohana (alon4dota2@gmail.com) changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |alon4dota2@gmail.com
> 
> --- Comment #1 from Alon Ohana (alon4dota2@gmail.com) ---
> Created attachment 308926
>   --> https://bugzilla.kernel.org/attachment.cgi?id=308926&action=edit  
> bmc150_accel_buffer_postenable NULL deref diff
> 

Thanks for the report. The thread you reference does discuss
the correct fix.  The ability to enable interrupts at all should be
prevented by removing the userspace interfaces (that are misleading
if there is no interrupt available!).

A few oddities that didn't come up in that thread though.
The trigger provided by this device is not registered if irq <= 0
So we must be using some other trigger or something else is going on.

Could you share the names of the triggers under
/sys/bus/iio/devices/trigger*/name
and
cat /proc/interrupts

Maybe the tooling is using an hrtimer or sysfs trigger but the
driver seems to have a validate_trigger callback that should prevent that
so I think we need a little more information.

Thanks

Jonathan

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