From 0648c55e3a21ccd816e99b6600d6199fbf39d23a Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <bjorn.andersson@linaro.org>
Date: Thu, 7 Jan 2021 15:25:26 -0800
Subject: [PATCH] soc: qcom: mdt_loader: Detect truncated read of segments
Git-commit: 0648c55e3a21ccd816e99b6600d6199fbf39d23a
Patch-mainline: v5.13-rc1
References: git-fixes
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/soc/qcom/mdt_loader.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c
index 2ddaee5ef9cc..eba7f76f9d61 100644
--- a/drivers/soc/qcom/mdt_loader.c
+++ b/drivers/soc/qcom/mdt_loader.c
@@ -261,6 +261,15 @@ static 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);
}
--
2.26.2