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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id d14-20020aa7868e000000b0050dc76281a3sm6929562pfo.125.2022.05.03.18.47.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 May 2022 18:47:39 -0700 (PDT) From: Kees Cook To: "Gustavo A . R . Silva" Cc: Kees Cook , Loic Poulain , Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , wcn36xx@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Alexei Starovoitov , alsa-devel@alsa-project.org, Al Viro , Andrew Gabbasov , Andrew Morton , Andy Gross , Andy Lavr , Arend van Spriel , Baowen Zheng , Bjorn Andersson , Boris Ostrovsky , Bradley Grove , brcm80211-dev-list.pdl@broadcom.com, Christian Brauner , =?utf-8?q?Christian_G=C3=B6ttsche?= , Christian Lamparter , Chris Zankel , Cong Wang , Daniel Axtens , Daniel Vetter , Dan Williams , David Gow , David Howells , Dennis Dalessandro , devicetree@vger.kernel.org, Dexuan Cui , Dmitry Kasatkin , Eli Cohen , Eric Paris , Eugeniu Rosca , Felipe Balbi , Francis Laniel , Frank Rowand , Franky Lin , Greg Kroah-Hartman , Gregory Greenman , Guenter Roeck , Haiyang Zhang , Hante Meuleman , Herbert Xu , Hulk Robot , "James E.J. Bottomley" , James Morris , Jarkko Sakkinen , Jaroslav Kysela , Jason Gunthorpe , Jens Axboe , Johan Hedberg , Johannes Berg , Johannes Berg , John Keeping , Juergen Gross , Keith Packard , keyrings@vger.kernel.org, kunit-dev@googlegroups.com, Kuniyuki Iwashima , "K. Y. Srinivasan" , Lars-Peter Clausen , Lee Jones , Leon Romanovsky , Liam Girdwood , linux1394-devel@lists.sourceforge.net, linux-afs@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-hardening@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-integrity@vger.kernel.org, linux-rdma@vger.kernel.org, linux-scsi@vger.kernel.org, linux-security-module@vger.kernel.org, linux-usb@vger.kernel.org, linux-xtensa@linux-xtensa.org, llvm@lists.linux.dev, Louis Peens , Luca Coelho , Luiz Augusto von Dentz , Marc Dionne , Marcel Holtmann , Mark Brown , "Martin K. Petersen" , Max Filippov , Mimi Zohar , Muchun Song , Nathan Chancellor , Nick Desaulniers , =?utf-8?q?Nuno_S=C3=A1?= , Paul Moore , Rich Felker , Rob Herring , Russell King , selinux@vger.kernel.org, "Serge E. Hallyn" , SHA-cyfmac-dev-list@infineon.com, Simon Horman , Stefano Stabellini , Stefan Richter , Steffen Klassert , Stephen Hemminger , Stephen Smalley , Tadeusz Struk , Takashi Iwai , Tom Rix , Udipto Goswami , Vincenzo Frascino , Wei Liu , xen-devel@lists.xenproject.org, Xiu Jianfeng , Yang Yingliang Subject: [PATCH 10/32] wcn36xx: Use mem_to_flex_dup() with struct wcn36xx_hal_ind_msg Date: Tue, 3 May 2022 18:44:19 -0700 Message-Id: <20220504014440.3697851-11-keescook@chromium.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220504014440.3697851-1-keescook@chromium.org> References: <20220504014440.3697851-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2631; h=from:subject; bh=Msy2+XfnfeHEfU9VZJ5tdjPuaYOOARhkHxIAzZX3hrE=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBicdqCU5cwj3opYKUJRuHiQ6yrF7a8I32dTqix7rZH epN2AJmJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYnHaggAKCRCJcvTf3G3AJlHYD/ wPCLYVdBQwlOASKzq0go8+yQ9WXYDGyw7A8O0OnAVu3fIR1Fz5Lc4pY5x32WjVh8glBxJBPELf/CJL MNaKgMdTHQ7NA2hxtEc7bQM+t4sMdVV5x1MYPoH8LFiI3+Tvt13YvoQ+E1WZ0t2qqUC8zhxbH36dxW Bc0wCumlz/0FK9T//W8qmXHq+YCTZhpOj4lIosW7Ic80QXG9vfEguHz+8nSw2PXbpXiLtiKMXYVPis NcxiHBa5qoFp2VamsSe418quush6XqJxmFvLZl7mtiboKYYYu2/qPzI5A37FAbPIGCru3jMXR/tCbm Q/hHT9bgmoM7Gg13G5tslRAOTf4pY5AWKIKHlUwbJswOg2FEBoabSKGh058NrhtgM0MjsUnbiDiOZ5 aO0FKd7cJsVfNFB7uZ3+4sBW8mA109abyB33FJQ/eJ+s21q6pPofkO9ECLZme3sqINH5kUfMBZEGbc CCwh1fPl5ZjvS1fXH/PGcDGjsAPJyMdcuEmaFNP9/8CuF7AfC9V9oEUOZ4lm0ofCSU0/fD12keSaj3 IHfhVbZKNV1ZZFfOUd6M2qngKUJR4ZbYTuwFlDxka/MvOQ2XJ1z5dhL/T/KTejeZjeDoZmMeDtRSc8 Toe4QQtXjKsYj/+iwJSz5/80d1lP2aqDJFhk1y/i4XSNcgPBCqcyBiQzMbsQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org As part of the work to perform bounds checking on all memcpy() uses, replace the open-coded a deserialization of bytes out of memory into a trailing flexible array by using a flex_array.h helper to perform the allocation, bounds checking, and copying. Cc: Loic Poulain Cc: Kalle Valo Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: wcn36xx@lists.infradead.org Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook --- drivers/net/wireless/ath/wcn36xx/smd.c | 8 ++------ drivers/net/wireless/ath/wcn36xx/smd.h | 4 ++-- 2 files changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c index dc3805609284..106af0a2ffc4 100644 --- a/drivers/net/wireless/ath/wcn36xx/smd.c +++ b/drivers/net/wireless/ath/wcn36xx/smd.c @@ -3343,7 +3343,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev, const struct wcn36xx_hal_msg_header *msg_header = buf; struct ieee80211_hw *hw = priv; struct wcn36xx *wcn = hw->priv; - struct wcn36xx_hal_ind_msg *msg_ind; + struct wcn36xx_hal_ind_msg *msg_ind = NULL; wcn36xx_dbg_dump(WCN36XX_DBG_SMD_DUMP, "SMD <<< ", buf, len); switch (msg_header->msg_type) { @@ -3407,16 +3407,12 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev, case WCN36XX_HAL_DELETE_STA_CONTEXT_IND: case WCN36XX_HAL_PRINT_REG_INFO_IND: case WCN36XX_HAL_SCAN_OFFLOAD_IND: - msg_ind = kmalloc(struct_size(msg_ind, msg, len), GFP_ATOMIC); - if (!msg_ind) { + if (mem_to_flex_dup(&msg_ind, buf, len, GFP_ATOMIC)) { wcn36xx_err("Run out of memory while handling SMD_EVENT (%d)\n", msg_header->msg_type); return -ENOMEM; } - msg_ind->msg_len = len; - memcpy(msg_ind->msg, buf, len); - spin_lock(&wcn->hal_ind_lock); list_add_tail(&msg_ind->list, &wcn->hal_ind_queue); queue_work(wcn->hal_ind_wq, &wcn->hal_ind_work); diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h index 3fd598ac2a27..76ecac46f36b 100644 --- a/drivers/net/wireless/ath/wcn36xx/smd.h +++ b/drivers/net/wireless/ath/wcn36xx/smd.h @@ -46,8 +46,8 @@ struct wcn36xx_fw_msg_status_rsp { struct wcn36xx_hal_ind_msg { struct list_head list; - size_t msg_len; - u8 msg[]; + DECLARE_FLEX_ARRAY_ELEMENTS_COUNT(size_t, msg_len); + DECLARE_FLEX_ARRAY_ELEMENTS(u8, msg); }; struct wcn36xx;