From: Wenwen Wang <wang6495@umn.edu>
Date: Thu, 27 Dec 2018 02:15:13 +0000 (-0600)
Subject: gdrom: fix a memory leak bug
X-Git-Tag: v4.14.99~56
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e5727e4feb221f40d70b8c91e116543c491c83c1;p=users%2Fjedix%2Flinux-maple.git

gdrom: fix a memory leak bug

[ Upstream commit 093c48213ee37c3c3ff1cf5ac1aa2a9d8bc66017 ]

In probe_gdrom(), the buffer pointed by 'gd.cd_info' is allocated through
kzalloc() and is used to hold the information of the gdrom device. To
register and unregister the device, the pointer 'gd.cd_info' is passed to
the functions register_cdrom() and unregister_cdrom(), respectively.
However, this buffer is not freed after it is used, which can cause a
memory leak bug.

This patch simply frees the buffer 'gd.cd_info' in exit_gdrom() to fix the
above issue.

Signed-off-by: Wenwen Wang <wang6495@umn.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index ae3a7537cf0f..72cd96a8eb19 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -889,6 +889,7 @@ static void __exit exit_gdrom(void)
 	platform_device_unregister(pd);
 	platform_driver_unregister(&gdrom_driver);
 	kfree(gd.toc);
+	kfree(gd.cd_info);
 }
 
 module_init(init_gdrom);