linux-kernel - [PATCH] scsi: ufs: fix potential memory leak

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Date:	Wed, 8 Jun 2016 02:00:35 +0800 (CST)
From:	"Tiezhu Yang" <kernelpatch@....com>
To:	martin.petersen@...cle.com
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: ufs: fix potential memory leak

There exists potential memory leak in ufshcd_parse_clock_info(),
this patch fixes it.

Signed-off-by: Tiezhu Yang <kernelpatch@....com>
---
 drivers/scsi/ufs/ufshcd-pltfrm.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c
index db53f38..8b057f4 100644
--- a/drivers/scsi/ufs/ufshcd-pltfrm.c
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
@@ -100,19 +100,19 @@ static int ufshcd_parse_clock_info(struct ufs_hba *hba)
 	if (ret && (ret != -EINVAL)) {
 		dev_err(dev, "%s: error reading array %d\n",
 				"freq-table-hz", ret);
-		return ret;
+		goto out_free;
 	}
 
 	for (i = 0; i < sz; i += 2) {
 		ret = of_property_read_string_index(np,
 				"clock-names", i/2, (const char **)&name);
 		if (ret)
-			goto out;
+			goto out_free;
 
 		clki = devm_kzalloc(dev, sizeof(*clki), GFP_KERNEL);
 		if (!clki) {
 			ret = -ENOMEM;
-			goto out;
+			goto out_free;
 		}
 
 		clki->min_freq = clkfreq[i];
@@ -122,6 +122,10 @@ static int ufshcd_parse_clock_info(struct ufs_hba *hba)
 				clki->min_freq, clki->max_freq, clki->name);
 		list_add_tail(&clki->list, &hba->clk_list_head);
 	}
+
+out_free:
+	devm_kfree(dev, clkfreq);
+	clkfreq = NULL;
 out:
 	return ret;
 }
-- 
1.8.3.1