linux-kernel - [PATCH 02/05] tmio_mmc: Fix use after free in remove()

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Date:	Wed, 11 Mar 2009 21:59:03 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	drzeus-wbsd@...eus.cx, Magnus Damm <magnus.damm@...il.com>,
	ian@...menth.co.uk, akpm@...ux-foundation.org
Subject: [PATCH 02/05] tmio_mmc: Fix use after free in remove()

From:  Magnus Damm <damm@...nsource.se>

Update the tmio_mmc code to call mmc_free_host() when
done using the private data. Without this fix the driver
frees memory and then keeps on using it as private data.

Signed-off-by: Magnus Damm <damm@...nsource.se>
---

 drivers/mmc/host/tmio_mmc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 0010/drivers/mmc/host/tmio_mmc.c
+++ work/drivers/mmc/host/tmio_mmc.c	2009-03-11 19:24:03.000000000 +0900
@@ -650,10 +650,10 @@ static int __devexit tmio_mmc_remove(str
 	if (mmc) {
 		struct tmio_mmc_host *host = mmc_priv(mmc);
 		mmc_remove_host(mmc);
-		mmc_free_host(mmc);
 		free_irq(host->irq, host);
 		iounmap(host->ctl);
 		iounmap(host->cnf);
+		mmc_free_host(mmc);
 	}
 
 	return 0;
--
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