diff mbox series

[4.14,167/323] soc: qcom: mdt_loader: Detect truncated read of segments

Message ID 20210520092125.830445780@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH May 20, 2021, 9:20 a.m. UTC 
From: Bjorn Andersson <bjorn.andersson@linaro.org>


[ Upstream commit 0648c55e3a21ccd816e99b6600d6199fbf39d23a ]

Given that no validation of how much data the firmware loader read in
for a given segment truncated segment files would best case result in a
hash verification failure, without any indication of what went wrong.

Improve this by validating that the firmware loader did return the
amount of data requested.

Fixes: 445c2410a449 ("soc: qcom: mdt_loader: Use request_firmware_into_buf()")
Reviewed-by: Sibi Sankar <sibis@codeaurora.org>

Link: https://lore.kernel.org/r/20210107232526.716989-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 drivers/soc/qcom/mdt_loader.c | 9 +++++++++
 1 file changed, 9 insertions(+)

-- 
2.30.2
diff mbox series

Patch

diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c
index 17cba12cdf61..9155b1c75cfb 100644
--- a/drivers/soc/qcom/mdt_loader.c
+++ b/drivers/soc/qcom/mdt_loader.c
@@ -193,6 +193,15 @@  int qcom_mdt_load(struct device *dev, const struct firmware *fw,
 				break;
 			}
 
+			if (seg_fw->size != phdr->p_filesz) {
+				dev_err(dev,
+					"failed to load segment %d from truncated file %s\n",
+					i, fw_name);
+				release_firmware(seg_fw);
+				ret = -EINVAL;
+				break;
+			}
+
 			release_firmware(seg_fw);
 		}