linux-kernel - Re: [PATCH] mac80211_hwsim: fix divide error in mac80211_hwsim_link_info

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Message-ID: <20251205230344.326220-1-dkarn@redhat.com>
Date: Sat,  6 Dec 2025 04:33:44 +0530
From: Deepakkumar Karn <dkarn@...hat.com>
To: johannes@...solutions.net
Cc: dkarn@...hat.com,
	linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org,
	shaul.triebitz@...el.com,
	syzbot+5bb5f06f99924ea0cf86@...kaller.appspotmail.com
Subject: Re: [PATCH] mac80211_hwsim: fix divide error in mac80211_hwsim_link_info_changed

On Fri, 05 Dec 2025 18:39:49 +0100, Johannes Berg wrote:
> Seems like we should not let userspace do that, to protect all other
> drivers too, not just hwsim.

As suggested, we should provide a zero-value division check for other 
drivers as well. I will investigate other places where divide errors can 
occur due to edge cases.

Please let me know if you meant something different. In the meantime,
I will analyze other drivers for similar cases.

Thanks,
Deepakkumar Karn