From f69d749d5f7fa29de59df256152486933fdb6adf Mon Sep 17 00:00:00 2001
From: Zhang Qilong <zhangqilong3@huawei.com>
Date: Tue, 17 Nov 2020 10:16:29 +0800
Subject: [PATCH] usb: gadget: Fix memleak in gadgetfs_fill_super

commit 87bed3d7d26c974948a3d6e7176f304b2d41272b upstream.

usb_get_gadget_udc_name will alloc memory for CHIP
in "Enomem" branch. we should free it before error
returns to prevent memleak.

Fixes: 175f712119c57 ("usb: gadget: provide interface for legacy gadgets to get UDC name")
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201117021629.1470544-3-zhangqilong3@huawei.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/legacy/inode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 238f555fe494..cabcbb47f0ac 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -2040,6 +2040,9 @@ gadgetfs_fill_super (struct super_block *sb, struct fs_context *fc)
 	return 0;
 
 Enomem:
+	kfree(CHIP);
+	CHIP = NULL;
+
 	return -ENOMEM;
 }