linux-kernel - Re: kernel NULL pointer dereference in bmc150_accel_core / RIP: 0010:bmc150_accel_set_interrupt+0x68/0x120 [bmc150_accel

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Message-ID: <aDt9DrWxKOUZHQ3K@spisula.zash.se>
Date: Sun, 1 Jun 2025 00:05:02 +0200
From: Kim Alvefur <zash@...h.se>
To: Salvatore Bonaccorso <carnil@...ian.org>
Cc: 1106411@...s.debian.org, Stephan Gerhold <stephan@...hold.net>,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>, linux-iio@...r.kernel.org,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org
Subject: Re: kernel NULL pointer dereference in bmc150_accel_core / RIP:
 0010:bmc150_accel_set_interrupt+0x68/0x120 [bmc150_accel_core]

On Sat, May 31, 2025 at 09:34:03PM +0200, Salvatore Bonaccorso wrote:
>On Fri, May 30, 2025 at 07:42:12PM +0200, Kim Alvefur wrote:
>> So far it seems to happen on every boot, between unlocking LUKS and the
>> login manager starting.
>>
>> I wonder if this is related to another symptom this machine has, where
>> it fails to complete suspend and goes into a state where the only action
>> that has any effect is a long-press of the power button to turn it off.
>
>Looking through the boot log I'm noticing the following:
>
>> May 30 19:21:47 spisula kernel: bmc150_accel_i2c i2c-BOSC0200:00: supply vdd not found, using dummy regulator
>> May 30 19:21:47 spisula kernel: bmc150_accel_i2c i2c-BOSC0200:00: supply vddio not found, using dummy regulator
>[...]
>> May 30 19:21:47 spisula kernel: bmc150_accel_i2c i2c-BOSC0200:base: supply vdd not found, using dummy regulator
>> May 30 19:21:47 spisula kernel: bmc150_accel_i2c i2c-BOSC0200:base: supply vddio not found, using dummy regulator
>
>and iio-sensor-proxy might fail to handle then the bosch 0200
>accelerometer. You proobably cannot temporary purge the
>iio-sensor-proxy if installed by reverse dependencies, but might you
>try to temporarily mask the service and retest a boot?

That seems to have an effect, no "BUG: ..." in dmesg now, and the
machine made it trough a suspends and resume cycle.

-- 
Kim "Zash" Alvefur