> -----Original Message----- > From: Paul Menzel [mailto:pmenzel+linux-wireless@xxxxxxxxxxxxx] > Sent: Wednesday, January 3, 2018 10:20 AM > To: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> > Cc: linux-wireless@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; it+linux- > wireless@xxxxxxxxxxxxx; Limonciello, Mario <Mario_Limonciello@xxxxxxxx>; > Thorsten Leemhuis <linux@xxxxxxxxxxxxx> > 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.