linux-kernel - [PATCH 4.9 022/111] video: goldfishfb: fix memory leak on driver remove

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Message-Id: <20180924113106.629373304@linuxfoundation.org>
Date:   Mon, 24 Sep 2018 13:51:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Anton Vasilyev <vasilyev@...ras.ru>,
        Aleksandar Markovic <aleksandar.markovic@...s.com>,
        Miodrag Dinic <miodrag.dinic@...s.com>,
        Goran Ferenc <goran.ferenc@...s.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 022/111] video: goldfishfb: fix memory leak on driver remove

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Anton Vasilyev <vasilyev@...ras.ru>

[ Upstream commit 5958fde72d04e7b8c6de3669d1f794a90997e3eb ]

goldfish_fb_probe() allocates memory for fb, but goldfish_fb_remove() does
not have deallocation of fb, which leads to memory leak on probe/remove.

The patch adds deallocation into goldfish_fb_remove().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@...ras.ru>
Cc: Aleksandar Markovic <aleksandar.markovic@...s.com>
Cc: Miodrag Dinic <miodrag.dinic@...s.com>
Cc: Goran Ferenc <goran.ferenc@...s.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/video/fbdev/goldfishfb.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/video/fbdev/goldfishfb.c
+++ b/drivers/video/fbdev/goldfishfb.c
@@ -301,6 +301,7 @@ static int goldfish_fb_remove(struct pla
 	dma_free_coherent(&pdev->dev, framesize, (void *)fb->fb.screen_base,
 						fb->fb.fix.smem_start);
 	iounmap(fb->reg_base);
+	kfree(fb);
 	return 0;
 }