linux-kernel - [PATCH AUTOSEL for 4.15 34/78] mmc: block: fix logical error to avoid memory leak

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Date:   Thu, 8 Mar 2018 04:56:16 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     "Liu, Changcheng" <changcheng.liu@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.15 34/78] mmc: block: fix logical error to avoid
 memory leak

From: "Liu, Changcheng" <changcheng.liu@...el.com>

[ Upstream commit 0be55579a127916ebe39db2a74d906a2dfceed42 ]

If the MMC_DRV_OP_GET_EXT_CSD request completes successfully, then
ext_csd must be freed, but in one case it was not. Fix that.

Signed-off-by: Liu Changcheng <changcheng.liu@...el.com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Acked-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/mmc/core/block.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index ccfa98af1dd3..b737a9540331 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2623,6 +2623,7 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
 
 	if (n != EXT_CSD_STR_LEN) {
 		err = -EINVAL;
+		kfree(ext_csd);
 		goto out_free;
 	}
 
-- 
2.14.1