From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 288DA19B5BE; Thu, 25 Jul 2024 14:40:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721918416; cv=none; b=YTbU8ge0tzeXhytvgLswQmVpAoTwS6A241C1AgO8+SNczXohADc13zZwK8YPzXmvTqWPmlX9XjV8BEy0kIcfiXg9+Ygg7c7cEabemAUht/0XCIVa0YowO6q322XFDfdqmhNlJYaqHn2BuQMOxI9Z0WQ+Upxabiyq+AxLr17Mw/Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721918416; c=relaxed/simple; bh=TawK+cl/P3o17roWmffj/iNXZY5cTDG+id9vAn6+zi8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VejKsk7QVzBQwRhLSYDB7ot5F7AONQPrMXfqzR+/LNOtDgIvZvKLxW62+7jjFAsIK80DSgi/iH/ByGfynyE7JMqi07czZ8PmcbAvQGO7hZ34OEAr7HpS2BGPUcTbArGA+GRvAbkcNGvxCW3uDEX2nWugDHyb17tojKMLTlYmNyc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cyO5jJe0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="cyO5jJe0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54F1FC116B1; Thu, 25 Jul 2024 14:40:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1721918415; bh=TawK+cl/P3o17roWmffj/iNXZY5cTDG+id9vAn6+zi8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cyO5jJe04OFszyoE/yvOSm8NUKIohqySow928P0XTGH4FePtX4Dl8QTSu4JCnljZX bbf7QLzNK6EkCsQViCreP3pGVOEbPeIOEqWc0cLchQdh3qqrQ9U2Yll81URuXNOTJw zzvjjmdJpYvQqrIkrkIm5ID8xulwDgTN4VzHAnak= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+253cd2d2491df77c93ac@syzkaller.appspotmail.com, Dmitry Antipov , Johannes Berg , Sasha Levin Subject: [PATCH 4.19 13/33] wifi: cfg80211: wext: add extra SIOCSIWSCAN data check Date: Thu, 25 Jul 2024 16:36:36 +0200 Message-ID: <20240725142729.022210563@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240725142728.511303502@linuxfoundation.org> References: <20240725142728.511303502@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Antipov [ 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. Reported-by: syzbot+253cd2d2491df77c93ac@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=253cd2d2491df77c93ac Signed-off-by: Dmitry Antipov Link: https://msgid.link/20240531032010.451295-1-dmantipov@yandex.ru Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/wireless/scan.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/net/wireless/scan.c b/net/wireless/scan.c index dacb9ceee3efd..0dc27703443c8 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1405,10 +1405,14 @@ int cfg80211_wext_siwscan(struct net_device *dev, wiphy = &rdev->wiphy; /* Determine number of channels, needed to allocate creq */ - if (wreq && wreq->num_channels) + if (wreq && wreq->num_channels) { + /* Passed from userspace so should be checked */ + if (unlikely(wreq->num_channels > IW_MAX_FREQUENCIES)) + return -EINVAL; n_channels = wreq->num_channels; - else + } else { n_channels = ieee80211_get_num_supported_channels(wiphy); + } creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + n_channels * sizeof(void *), -- 2.43.0