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>
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index cb02e9e..de0f3c2 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -2045,6 +2045,9 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
return 0;
Enomem:
+ kfree(CHIP);
+ CHIP = NULL;
+
return -ENOMEM;
}