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([2001:41d0:303:db6b::]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488f0eb3842sm30160995e9.24.2026.04.15.15.23.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2026 15:23:31 -0700 (PDT) From: Tristan Madani To: Brian Norris Cc: Johannes Berg , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/6] wifi: mwifiex: fix OOB write from firmware TID in ADDBA response handler Date: Wed, 15 Apr 2026 22:23:23 +0000 Message-ID: <20260415222327.1539269-3-tristmd@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260415222327.1539269-1-tristmd@gmail.com> References: <20260415222327.1539269-1-tristmd@gmail.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tristan Madani The TID value extracted from the Block Ack parameter set is a 4-bit field (0-15), but aggr_prio_tbl[] has only 8 entries. A TID >= 8 causes an out-of-bounds write to adjacent struct mwifiex_private fields. Add a bounds check after extracting the TID. Fixes: 5e6e3a92b9a4 ("wireless: mwifiex: initial commit for Marvell mwifiex driver") Signed-off-by: Tristan Madani --- drivers/net/wireless/marvell/mwifiex/11n.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/wireless/marvell/mwifiex/11n.c b/drivers/net/wireless/marvell/mwifiex/11n.c index XXXXXXX..XXXXXXX 100644 --- a/drivers/net/wireless/marvell/mwifiex/11n.c +++ b/drivers/net/wireless/marvell/mwifiex/11n.c @@ -155,6 +155,11 @@ int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv, tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK) >> BLOCKACKPARAM_TID_POS; + if (tid >= MAX_NUM_TID) { + mwifiex_dbg(priv->adapter, ERROR, + "ADDBA RSP: invalid tid %d\n", tid); + return -EINVAL; + } tid_down = mwifiex_wmm_downgrade_tid(priv, tid); ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, add_ba_rsp-> peer_mac_addr);