linux-kernel - [PATCH] i2c: i2c-boardinfo: fix memory leaks on devinfo

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Date:   Wed, 22 Nov 2017 17:52:24 +0000
From:   Colin King <colin.king@...onical.com>
To:     Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] i2c: i2c-boardinfo: fix memory leaks on devinfo

From: Colin Ian King <colin.king@...onical.com>

Currently when an error occurs devinfo is still allocated but is
unused when the error exit paths break out of the for-loop. Fix
this by kfree'ing devinfo to avoid the leak.

Detected by CoverityScan, CID#1416590 ("Resource Leak")

Fixes: 4124c4eba402 ("i2c: allow attaching IRQ resources to i2c_board_info")
Fixes: 0daaf99d8424 ("i2c: copy device properties when using i2c_register_board_info()")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/i2c/i2c-boardinfo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/i2c-boardinfo.c b/drivers/i2c/i2c-boardinfo.c
index 31186ead5a40..509a6007cdf6 100644
--- a/drivers/i2c/i2c-boardinfo.c
+++ b/drivers/i2c/i2c-boardinfo.c
@@ -86,6 +86,7 @@ int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsig
 					property_entries_dup(info->properties);
 			if (IS_ERR(devinfo->board_info.properties)) {
 				status = PTR_ERR(devinfo->board_info.properties);
+				kfree(devinfo);
 				break;
 			}
 		}
@@ -98,6 +99,7 @@ int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsig
 					GFP_KERNEL);
 			if (!devinfo->board_info.resources) {
 				status = -ENOMEM;
+				kfree(devinfo);
 				break;
 			}
 		}
-- 
2.14.1