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[34.127.51.67]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2df6a5d7a48sm21220615ad.48.2026.09.23.23.22.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Sep 2026 23:22:45 -0700 (PDT) From: Hui Peng To: h.morris@cascoda.com, alex.aring@gmail.com, miquel.raynal@bootlin.com, stefan@datenfreihafen.org Cc: david.laight.linux@gmail.com, linux-wpan@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Hui Peng Subject: [PATCH net v3 0/3] ieee802154: ca8210: fix stack and slab out-of-bounds accesses Date: Thu, 24 Sep 2026 06:22:41 +0000 Message-ID: <20260924062244.2444225-1-benquike@gmail.com> X-Mailer: git-send-email 2.56.0.rc1.310.g51773c2048-goog Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series fixes three out-of-bounds access bugs in the Cascoda CA8210 IEEE 802.15.4 driver: 1. Reject received SPI packets with len > sizeof(struct mac_message) in ca8210_rx_done() instead of checking len > CA8210_SPI_BUF_SIZE (256), preventing a stack buffer overflow when copying a synchronous response into priv->sync_command_response (a struct mac_message on the caller's stack) and matching the actual SPI transfer length (cas_ctl->transfer.len = sizeof(struct mac_message)). 2. Initialize lenvar = 1 in ca8210_get_ed() and validate hw_attribute_length against *hw_attribute_length in hwme_get_request_sync() before memcpy() to prevent overflowing the caller's stack buffer. 3. Validate the received SPI frame length len upfront at the start of ca8210_skb_rx() before reading data_ind or allocating the skb. Changes in v3: - Patch 1/3: Check len > sizeof(struct mac_message) in ca8210_rx_done() where dev_crit() logs "Received packet len (%u) erroneously long" and drops the packet, instead of silently truncating the memcpy() with min_t(), addressing David Laight's feedback. Changes in v2: - Split the ca8210 fixes into three single-issue patches (1/3..3/3) and addressed Miquel Raynal's review comments on patches 2/3 and 3/3. Hui Peng (3): ieee802154: ca8210: prevent stack buffer overflow in ca8210_rx_done() ieee802154: ca8210: prevent stack buffer overflow in hwme_get_request_sync() ieee802154: ca8210: validate data_ind length upfront in ca8210_skb_rx() drivers/net/ieee802154/ca8210.c | 39 +++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 12 deletions(-) -- 2.49.0