netdev - Re: [PATCH] wifi: mac80211: check basic rates validity

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Message-ID: <2024073014-borrowing-justifier-18c8@gregkh>
Date: Tue, 30 Jul 2024 16:23:25 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Vincenzo Mezzela <vincenzo.mezzela@...il.com>
Cc: johannes@...solutions.net, sashal@...nel.org,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	javier.carrasco.cruz@...il.com, skhan@...uxfoundation.org,
	stable@...r.kernel.org, Johannes Berg <johannes.berg@...el.com>,
	syzbot+07bee335584b04e7c2f8@...kaller.appspotmail.com
Subject: Re: [PATCH] wifi: mac80211: check basic rates validity

On Mon, Jul 29, 2024 at 03:43:18PM +0200, Vincenzo Mezzela wrote:
> From: Johannes Berg <johannes.berg@...el.com>
> 
> commit ce04abc3fcc62cd5640af981ebfd7c4dc3bded28 upstream.
> 
> When userspace sets basic rates, it might send us some rates
> list that's empty or consists of invalid values only. We're
> currently ignoring invalid values and then may end up with a
> rates bitmap that's empty, which later results in a warning.
> 
> Reject the call if there were no valid rates.
> 
> [ Conflict resolution involved adjusting the patch to accommodate
> changes in the function signature of ieee80211_parse_bitrates and
> ieee80211_check_rate_mask ]
> 
> Signed-off-by: Johannes Berg <johannes.berg@...el.com>
> Reported-by: syzbot+07bee335584b04e7c2f8@...kaller.appspotmail.com
> Tested-by: syzbot+07bee335584b04e7c2f8@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=07bee335584b04e7c2f8
> Signed-off-by: Vincenzo Mezzela <vincenzo.mezzela@...il.com>
> ---
> Hi,
> please note that a backport of the same patch for v5.15 is available at
> [1].

Please resend [1] as it's gone from my queue.

greg k-h