Patch "remoteproc: qcom: mdt_loader: Don't overwrite firmware object" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    remoteproc: qcom: mdt_loader: Don't overwrite firmware object

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     remoteproc-qcom-mdt_loader-don-t-overwrite-firmware-object.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 3e8b571a9a0881ba3381ca0915995696da145ab8 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <bjorn.andersson@linaro.org>
Date: Fri, 27 Jan 2017 02:06:36 -0800
Subject: remoteproc: qcom: mdt_loader: Don't overwrite firmware object

From: Bjorn Andersson <bjorn.andersson@linaro.org>

commit 3e8b571a9a0881ba3381ca0915995696da145ab8 upstream.

The "fw" firmware object is passed from the remoteproc core and should
not be overwritten, as that results in leaked buffers and a double free
of the the last firmware object.

Fixes: 051fb70fd4ea ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/remoteproc/qcom_mdt_loader.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/remoteproc/qcom_mdt_loader.c
+++ b/drivers/remoteproc/qcom_mdt_loader.c
@@ -115,6 +115,7 @@ int qcom_mdt_load(struct rproc *rproc,
 	const struct elf32_phdr *phdrs;
 	const struct elf32_phdr *phdr;
 	const struct elf32_hdr *ehdr;
+	const struct firmware *seg_fw;
 	size_t fw_name_len;
 	char *fw_name;
 	void *ptr;
@@ -153,16 +154,16 @@ int qcom_mdt_load(struct rproc *rproc,
 
 		if (phdr->p_filesz) {
 			sprintf(fw_name + fw_name_len - 3, "b%02d", i);
-			ret = request_firmware(&fw, fw_name, &rproc->dev);
+			ret = request_firmware(&seg_fw, fw_name, &rproc->dev);
 			if (ret) {
 				dev_err(&rproc->dev, "failed to load %s\n",
 					fw_name);
 				break;
 			}
 
-			memcpy(ptr, fw->data, fw->size);
+			memcpy(ptr, seg_fw->data, seg_fw->size);
 
-			release_firmware(fw);
+			release_firmware(seg_fw);
 		}
 
 		if (phdr->p_memsz > phdr->p_filesz)


Patches currently in stable-queue which might be from bjorn.andersson@linaro.org are

queue-4.9/remoteproc-qcom-mdt_loader-don-t-overwrite-firmware-object.patch