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SubjectRe: PROBLEM: NULL pointer dereference in dell_set_arguments() in 4.15
On Sat, Feb 03, 2018 at 07:20:21PM +0300, Alexander Sergeyev wrote:
> # first bad commit: [549b4930f057658dc50d8010e66219233119a4d8] platform/x86:
>dell-smbios: Introduce dispatcher for SMM calls

>From source code (at 549b4930f057) it looks like dell_set_arguments() which
>writes to `buffer` is called before the buffer gets allocated

Turns out that the problem has already surfaced before, but from a different
origin -- namely, rfkill interface [1]. This was subsequently fixed in
5246741a3f2e and c6f9288ee460.

This time there is an ordering problem between initialization of the
dell-laptop module and audio modules which are trying to flash a microphone
mute led on keyboard (via dell-laptop interface).

And about suspend-to-ram wakeup problem -- is it possible that there was some
buggy interaction with smbios that led to the observed behaviour?


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