linux-kernel - [PATCH v2 1/3] edac_mc: fix kfree calls in the error path

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Date:	Fri, 14 Sep 2012 12:58:16 -0500
From:	Shaun Ruffell <sruffell@...ium.com>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org
Subject: [PATCH v2 1/3] edac_mc: fix kfree calls in the error path

From: Fengguang Wu <fengguang.wu@...el.com>

From: Fengguang Wu <fengguang.wu@...el.com>

We need to free up memory in this order:

  free csrows[i]->channels[j]
  free csrows[i]->channels
  free csrows[i]
  free csrows

Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---
 drivers/edac/edac_mc.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 616d90b..9037ffa 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -419,14 +419,16 @@ error:
 		kfree(mci->dimms);
 	}
 	if (mci->csrows) {
-		for (chn = 0; chn < tot_channels; chn++) {
-			csr = mci->csrows[chn];
+		for (row = 0; row < tot_csrows; row++) {
+			csr = mci->csrows[row];
 			if (csr) {
-				for (chn = 0; chn < tot_channels; chn++)
-					kfree(csr->channels[chn]);
+				if (csr->channels) {
+					for (chn = 0; chn < tot_channels; chn++)
+						kfree(csr->channels[chn]);
+					kfree(csr->channels);
+				}
 				kfree(csr);
 			}
-			kfree(mci->csrows[i]);
 		}
 		kfree(mci->csrows);
 	}
-- 
1.7.11.2

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