From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 30 Jun 2017 08:02:42 +0000
Subject: [PATCH] video: fbdev: imxfb: use after free in imxfb_remove()
Message-Id: <20170630080242.emnw7l53f52pvzeo@mwanda>
List-Id: <linux-fbdev.vger.kernel.org>
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To: linux-fbdev@vger.kernel.org

We free "info" then dereference it on the next line.  I've moved the
call to framebuffer_release() down a line to avoid this problem.

Fixes: b7d2d37276c1 ("video: imxfb: Remove unused fields from platform data structure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
index c166e0725be5..1d0c3592b290 100644
--- a/drivers/video/fbdev/imxfb.c
+++ b/drivers/video/fbdev/imxfb.c
@@ -1080,10 +1080,9 @@ static int imxfb_remove(struct platform_device *pdev)
 
 	fb_dealloc_cmap(&info->cmap);
 	kfree(info->pseudo_palette);
-	framebuffer_release(info);
-
 	dma_free_wc(&pdev->dev, fbi->map_size, info->screen_base,
 		    fbi->map_dma);
+	framebuffer_release(info);
 
 	iounmap(fbi->regs);
 	release_mem_region(res->start, resource_size(res));