mmc: sh_mmcif: fix use after free
authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Tue, 23 Oct 2012 12:08:52 +0000 (14:08 +0200)
committerChris Ball <cjb@laptop.org>
Wed, 7 Nov 2012 20:02:02 +0000 (15:02 -0500)
A recent commit "mmc: sh_mmcif: fix clock management" has introduced a
use after free bug in sh_mmcif.c: in sh_mmcif_remove() the call to
mmc_free_host() frees private driver data, therefore using it afterwards
is a bug. Revert that hunk.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: stable@vger.kernel.org [3.6]
Signed-off-by: Chris Ball <cjb@laptop.org>
drivers/mmc/host/sh_mmcif.c

index 11d2bc3b51d578a357fd9b857084db1a89a91741..d25bc97dc5c60063bb609b22973e41790ced9762 100644 (file)
@@ -1466,9 +1466,9 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, NULL);
 
+       clk_disable(host->hclk);
        mmc_free_host(host->mmc);
        pm_runtime_put_sync(&pdev->dev);
-       clk_disable(host->hclk);
        pm_runtime_disable(&pdev->dev);
 
        return 0;