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

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To: Paul Menzel <pmenzel+linux-wireless@xxxxxxxxxxxxx>
Subject: Re: UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4: -1665903437 * 100 cannot be represented in type 'int'
From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Date: Wed, 17 Jan 2018 14:12:24 +0100
Cc: linux-wireless@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, it+linux-wireless@xxxxxxxxxxxxx, Mario Limonciello <mario.limonciello@xxxxxxxx>, Thorsten Leemhuis <linux@xxxxxxxxxxxxx>
In-reply-to: <b1e1592a-d975-dbc5-b3a3-6b97d9df0643@molgen.mpg.de>
References: <f58ac367-9b22-a7dc-7d45-7e9d19e179c0@molgen.mpg.de> <1515078514.10342.29.camel@sipsolutions.net> <b1e1592a-d975-dbc5-b3a3-6b97d9df0643@molgen.mpg.de>

On Wed, 2018-01-17 at 13:22 +0100, Paul Menzel wrote:
> 
> Yes it does. Thank you. Rebuilding Linux 4.15-rc8+ with this patch 
> applied, the UBSAN doesn’t report this issue anymore.

Thanks for testing, the patch is on its way to get to 4.15 (hopefully)

johannes

References:
- UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4: -1665903437 * 100 cannot be represented in type 'int'
  - From: Paul Menzel
- Re: UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4: -1665903437 * 100 cannot be represented in type 'int'
  - From: Johannes Berg
- Re: UBSAN: Undefined behaviour in net/wireless/nl80211.c:718:4: -1665903437 * 100 cannot be represented in type 'int'
  - From: Paul Menzel

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