From: Greg KH <greg@kroah.com>
To: Pavel Machek <pavel@denx.de>
Cc: Sasha Levin <sashal@kernel.org>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Dmitry Antipov <dmantipov@yandex.ru>,
syzbot+253cd2d2491df77c93ac@syzkaller.appspotmail.com,
Johannes Berg <johannes.berg@intel.com>,
johannes@sipsolutions.net, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 4.19] wifi: cfg80211: wext: add extra SIOCSIWSCAN data check
Date: Wed, 10 Jul 2024 12:24:55 +0200 [thread overview]
Message-ID: <2024071033-geologic-emerald-f6a2@gregkh> (raw)
In-Reply-To: <Zo5cn37w8NjVyZdj@duo.ucw.cz>
On Wed, Jul 10, 2024 at 12:04:15PM +0200, Pavel Machek wrote:
> Hi!
>
> > [ Upstream commit 6ef09cdc5ba0f93826c09d810c141a8d103a80fc ]
> >
> > In 'cfg80211_wext_siwscan()', add extra check whether number of
> > channels passed via 'ioctl(sock, SIOCSIWSCAN, ...)' doesn't exceed
> > IW_MAX_FREQUENCIES and reject invalid request with -EINVAL otherwise.
>
> This results in very confusing code in 4.19 at least. It should goto
> out for consistency, exploting kfree(NULL) to be nop. Ok, not sure we
> care...
kfree(NULL) is always supposed to be a nop, we have relied on that for
decades, that's not an issue anywhere.
greg k-h
next prev parent reply other threads:[~2024-07-10 10:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-01 0:15 [PATCH AUTOSEL 4.19] wifi: cfg80211: wext: add extra SIOCSIWSCAN data check Sasha Levin
2024-07-10 10:04 ` Pavel Machek
2024-07-10 10:24 ` Greg KH [this message]
2024-07-10 12:06 ` Pavel Machek
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