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Tue, 13 Feb 2024 08:00:13 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 41D80Dqk025478; Tue, 13 Feb 2024 08:00:13 GMT Received: from hu-maiyas-hyd.qualcomm.com (hu-audityab-hyd.qualcomm.com [10.147.244.159]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 41D80DOw025473; Tue, 13 Feb 2024 08:00:13 +0000 Received: by hu-maiyas-hyd.qualcomm.com (Postfix, from userid 207879) id 38B835001A8; Tue, 13 Feb 2024 13:30:12 +0530 (+0530) From: Auditya Bhattaram To: andersson@kernel.org, konrad.dybcio@linaro.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Auditya Bhattaram Subject: [PATCH v4] soc: qcom: mdt_loader: Add Upperbounds check for program header access Date: Tue, 13 Feb 2024 13:30:10 +0530 Message-Id: <20240213080010.16924-1-quic_audityab@quicinc.com> X-Mailer: git-send-email 2.17.1 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 8CyY1HOmZj5bcnTO8AYUO7CFp0KxC2eU X-Proofpoint-ORIG-GUID: 8CyY1HOmZj5bcnTO8AYUO7CFp0KxC2eU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-13_04,2024-02-12_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 impostorscore=0 mlxlogscore=999 bulkscore=0 priorityscore=1501 suspectscore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402130061 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790769890225184841 X-GMAIL-MSGID: 1790769890225184841 hash_index is evaluated by looping phdrs till QCOM_MDT_TYPE_HASH is found. Add an upperbound check to phdrs to access within elf size. Fixes: 64fb5eb87d58 ("soc: qcom: mdt_loader: Allow hash to reside in any segment") Cc: Signed-off-by: Auditya Bhattaram Acked-by: Mukesh Ojha --- Changes in v4: - Added additional prints incase of Invalid access. Link to v3 https://lore.kernel.org/stable/1c91c653-cebe-4407-bdd6-cfc73b64c0fb@quicinc.com Link to v2 https://lore.kernel.org/linux-arm-msm/9773d189-c896-d5c5-804c-e086c24987b4@quicinc.com/T/#t Link to v1 https://lore.kernel.org/linux-arm-msm/5d7a3b97-d840-4863-91a0-32c1d8e7532f@linaro.org/T/#t --- drivers/soc/qcom/mdt_loader.c | 7 +++++++ 1 file changed, 7 insertions(+) -- 2.17.1 diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c index 6f177e46fa0f..1a79a7bba468 100644 --- a/drivers/soc/qcom/mdt_loader.c +++ b/drivers/soc/qcom/mdt_loader.c @@ -145,6 +143,13 @@ void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len, if (phdrs[0].p_type == PT_LOAD) return ERR_PTR(-EINVAL); + if (((size_t)(phdrs + ehdr->e_phnum)) > ((size_t)ehdr + fw->size)) { + dev_err(dev, + "Invalid phdrs access for fw: %s, e_phnum: %u, fw->size: %zu\n", + fw_name, ehdr->e_phnum, fw->size); + return ERR_PTR(-EINVAL); + } + for (i = 1; i < ehdr->e_phnum; i++) { if ((phdrs[i].p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH) { hash_segment = i;