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 9950579EF; Sat, 30 Dec 2023 12:02:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="FoemCF/W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 226B9C433C8; Sat, 30 Dec 2023 12:02:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1703937777; bh=FhTdmwuk5yHzPUZKf3Ukx0Ml4Fg1IqqY5JGZWZgZ5Ts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FoemCF/WjoHMJuqrSiwGIAJ5cnLxFEvhZYrAmFunHOPMDtAyUdX7MdKLQ7lyFRLvL 06xvhDZSvUneXAECWYF/JGxRSYiBFxx+54C+hbaSevryG58BmEqJ6DyVsQQABE05RT ARzD6oMA1c9Fbf0WmGEx3hHbhjODz+e5xmqHa64w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johannes Berg , Miri Korenblit , Sasha Levin Subject: [PATCH 6.6 025/156] wifi: mac80211: check defragmentation succeeded Date: Sat, 30 Dec 2023 11:57:59 +0000 Message-ID: <20231230115813.199111872@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231230115812.333117904@linuxfoundation.org> References: <20231230115812.333117904@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Berg [ Upstream commit 98849ba2aa9db46e62720fb686a9d63ed9887806 ] We need to check that cfg80211_defragment_element() didn't return an error, since it can fail due to bad input, and we didn't catch that before. Fixes: 8eb8dd2ffbbb ("wifi: mac80211: Support link removal using Reconfiguration ML element") Signed-off-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://msgid.link/20231211085121.8595a6b67fc0.I1225edd8f98355e007f96502e358e476c7971d8c@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/mlme.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 0c9198997482b..73f8df03d159c 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -5805,7 +5805,7 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, { const struct ieee80211_multi_link_elem *ml; const struct element *sub; - size_t ml_len; + ssize_t ml_len; unsigned long removed_links = 0; u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; u8 link_id; @@ -5821,6 +5821,8 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, elems->scratch + elems->scratch_len - elems->scratch_pos, WLAN_EID_FRAGMENT); + if (ml_len < 0) + return; elems->ml_reconf = (const void *)elems->scratch_pos; elems->ml_reconf_len = ml_len; -- 2.43.0