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[104.57.184.186]) by smtp.gmail.com with ESMTPSA id a6sm2326663otq.79.2021.03.12.15.18.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Mar 2021 15:18:59 -0800 (PST) From: Bjorn Andersson To: Andy Gross , Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Sibi Sankar , Siddharth Gupta Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] remoteproc: qcom_q6v5_mss: Validate p_filesz in ELF loader Date: Fri, 12 Mar 2021 15:20:02 -0800 Message-Id: <20210312232002.3466791-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Analog to the issue in the common mdt_loader code the MSS ELF loader does not validate that p_filesz bytes will fit in the memory region and that the loaded segments are not truncated. Fix this in the same way as proposed for the mdt_loader. Fixes: 135b9e8d1cd8 ("remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load") Signed-off-by: Bjorn Andersson --- Changes since v1: - Don't just break the loop, goto release_firmware. - Release seg_fw as well. drivers/remoteproc/qcom_q6v5_mss.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c index 66106ba25ba3..14e0ce5f18f5 100644 --- a/drivers/remoteproc/qcom_q6v5_mss.c +++ b/drivers/remoteproc/qcom_q6v5_mss.c @@ -1210,6 +1210,14 @@ static int q6v5_mpss_load(struct q6v5 *qproc) goto release_firmware; } + if (phdr->p_filesz > phdr->p_memsz) { + dev_err(qproc->dev, + "refusing to load segment %d with p_filesz > p_memsz\n", + i); + ret = -EINVAL; + goto release_firmware; + } + ptr = memremap(qproc->mpss_phys + offset, phdr->p_memsz, MEMREMAP_WC); if (!ptr) { dev_err(qproc->dev, @@ -1241,6 +1249,16 @@ static int q6v5_mpss_load(struct q6v5 *qproc) goto release_firmware; } + if (seg_fw->size != phdr->p_filesz) { + dev_err(qproc->dev, + "failed to load segment %d from truncated file %s\n", + i, fw_name); + ret = -EINVAL; + release_firmware(seg_fw); + memunmap(ptr); + goto release_firmware; + } + release_firmware(seg_fw); } -- 2.29.2