From: John Keeping <john@xxxxxxxxxxxx>
[ Upstream commit 70a3288a7586526315105c699b687d78cd32559a ]
When failing to allocate report_desc, opts->refcnt has already been
incremented so it needs to be decremented to avoid leaving the options
structure permanently locked.
Fixes: 21a9476a7ba8 ("usb: gadget: hid: add configfs support")
Tested-by: Lee Jones <lee@xxxxxxxxxx>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
Reviewed-by: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: John Keeping <john@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221122123523.3068034-3-john@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/usb/gadget/function/f_hid.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index 8b8bbeaa27cb..6be6009f911e 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -1292,6 +1292,7 @@ static struct usb_function *hidg_alloc(struct usb_function_instance *fi)
GFP_KERNEL);
if (!hidg->report_desc) {
put_device(&hidg->dev);
+ --opts->refcnt;
mutex_unlock(&opts->lock);
return ERR_PTR(-ENOMEM);
}
--
2.35.1
