linux-kernel - RE: UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4: -1665903437 * 100 cannot be represented in type 'int'

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Message-ID: <bff3b1403a344bccbdec84c60f20d638@ausx13mpc120.AMER.DELL.COM>
Date:   Wed, 3 Jan 2018 16:25:47 +0000
From:   <Mario.Limonciello@...l.com>
To:     <pmenzel+linux-wireless@...gen.mpg.de>, <johannes@...solutions.net>
CC:     <linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <it+linux-wireless@...gen.mpg.de>, <linux@...mhuis.info>
Subject: RE: UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4:
 -1665903437 * 100 cannot be represented in type 'int'

> -----Original Message-----
> From: Paul Menzel [mailto:pmenzel+linux-wireless@...gen.mpg.de]
> Sent: Wednesday, January 3, 2018 10:20 AM
> To: Johannes Berg <johannes@...solutions.net>
> Cc: linux-wireless@...r.kernel.org; linux-kernel@...r.kernel.org; it+linux-
> wireless@...gen.mpg.de; Limonciello, Mario <Mario_Limonciello@...l.com>;
> Thorsten Leemhuis <linux@...mhuis.info>
> Subject: UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4: -
> 1665903437 * 100 cannot be represented in type 'int'

<snip>

> [  119.866923] dell_smbios: No dell-smbios drivers are loaded
> [  119.866930] dell_smbios: No dell-smbios drivers are loaded
> [  119.866932] dell_smbios: No dell-smbios drivers are loaded
> [  119.866937] dell_smbios: No dell-smbios drivers are loaded
> [  119.866939] dell_smbios: No dell-smbios drivers are loaded
> [  119.866941] dell_smbios: No dell-smbios drivers are loaded
> [  120.767721] dell_smbios: No dell-smbios drivers are loaded
> [  120.767729] dell_smbios: No dell-smbios drivers are loaded
> [  120.767731] dell_smbios: No dell-smbios drivers are loaded
> [  120.767736] dell_smbios: No dell-smbios drivers are loaded
> [  120.767738] dell_smbios: No dell-smbios drivers are loaded
> [  120.767740] dell_smbios: No dell-smbios drivers are loaded
> [  121.075387] dell_smbios: No dell-smbios drivers are loaded
> [  121.075394] dell_smbios: No dell-smbios drivers are loaded
> [  121.075396] dell_smbios: No dell-smbios drivers are loaded
> [  121.075401] dell_smbios: No dell-smbios drivers are loaded
> [  121.075403] dell_smbios: No dell-smbios drivers are loaded
> [  121.075405] dell_smbios: No dell-smbios drivers are loaded

I know this isn't the focal point of your message, but these are 
expected messages if you don't have dell-smbios-smm or 
dell-smbios-wmi loaded.  That means that another module in the
kernel is trying to run a SMBIOS call but can't due to no dispatcher.