linux-kernel - [PATCH 5.9 354/391] memory: brcmstb

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Date:   Tue,  3 Nov 2020 21:36:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alex Dewar <alex.dewar90@...il.com>,
        Markus Mayer <mmayer@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH 5.9 354/391] memory: brcmstb_dpfe: Fix memory leak

From: Alex Dewar <alex.dewar90@...il.com>

commit 4da1edcf8f226d53c02c6b0e3077d581115b30d0 upstream.

In brcmstb_dpfe_download_firmware(), memory is allocated to variable fw by
firmware_request_nowarn(), but never released. Fix up to release fw on
all return paths.

Cc: <stable@...r.kernel.org>
Fixes: 2f330caff577 ("memory: brcmstb: Add driver for DPFE")
Signed-off-by: Alex Dewar <alex.dewar90@...il.com>
Acked-by: Markus Mayer <mmayer@...adcom.com>
Acked-by: Florian Fainelli <f.fainelli@...il.com>
Link: https://lore.kernel.org/r/20200820172118.781324-1-alex.dewar90@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/memory/brcmstb_dpfe.c |   16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

--- a/drivers/memory/brcmstb_dpfe.c
+++ b/drivers/memory/brcmstb_dpfe.c
@@ -656,8 +656,10 @@ static int brcmstb_dpfe_download_firmwar
 		return (ret == -ENOENT) ? -EPROBE_DEFER : ret;
 
 	ret = __verify_firmware(&init, fw);
-	if (ret)
-		return -EFAULT;
+	if (ret) {
+		ret = -EFAULT;
+		goto release_fw;
+	}
 
 	__disable_dcpu(priv);
 
@@ -676,18 +678,20 @@ static int brcmstb_dpfe_download_firmwar
 
 	ret = __write_firmware(priv->dmem, dmem, dmem_size, is_big_endian);
 	if (ret)
-		return ret;
+		goto release_fw;
 	ret = __write_firmware(priv->imem, imem, imem_size, is_big_endian);
 	if (ret)
-		return ret;
+		goto release_fw;
 
 	ret = __verify_fw_checksum(&init, priv, header, init.chksum);
 	if (ret)
-		return ret;
+		goto release_fw;
 
 	__enable_dcpu(priv);
 
-	return 0;
+release_fw:
+	release_firmware(fw);
+	return ret;
 }
 
 static ssize_t generic_show(unsigned int command, u32 response[],