| From e7694cb6998379341fd9bf3bd62b48c4e6a79385 Mon Sep 17 00:00:00 2001 |
| From: Zhang Qilong <zhangqilong3@huawei.com> |
| Date: Tue, 17 Nov 2020 10:16:28 +0800 |
| Subject: usb: gadget: f_midi: Fix memleak in f_midi_alloc |
| |
| From: Zhang Qilong <zhangqilong3@huawei.com> |
| |
| commit e7694cb6998379341fd9bf3bd62b48c4e6a79385 upstream. |
| |
| In the error path, if midi is not null, we should |
| free the midi->id if necessary to prevent memleak. |
| |
| Fixes: b85e9de9e818d ("usb: gadget: f_midi: convert to new function interface with backward compatibility") |
| Reported-by: Hulk Robot <hulkci@huawei.com> |
| Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> |
| Link: https://lore.kernel.org/r/20201117021629.1470544-2-zhangqilong3@huawei.com |
| Cc: stable <stable@vger.kernel.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/usb/gadget/function/f_midi.c | 10 +++++++--- |
| 1 file changed, 7 insertions(+), 3 deletions(-) |
| |
| --- a/drivers/usb/gadget/function/f_midi.c |
| +++ b/drivers/usb/gadget/function/f_midi.c |
| @@ -1315,7 +1315,7 @@ static struct usb_function *f_midi_alloc |
| midi->id = kstrdup(opts->id, GFP_KERNEL); |
| if (opts->id && !midi->id) { |
| status = -ENOMEM; |
| - goto setup_fail; |
| + goto midi_free; |
| } |
| midi->in_ports = opts->in_ports; |
| midi->out_ports = opts->out_ports; |
| @@ -1327,7 +1327,7 @@ static struct usb_function *f_midi_alloc |
| |
| status = kfifo_alloc(&midi->in_req_fifo, midi->qlen, GFP_KERNEL); |
| if (status) |
| - goto setup_fail; |
| + goto midi_free; |
| |
| spin_lock_init(&midi->transmit_lock); |
| |
| @@ -1343,9 +1343,13 @@ static struct usb_function *f_midi_alloc |
| |
| return &midi->func; |
| |
| +midi_free: |
| + if (midi) |
| + kfree(midi->id); |
| + kfree(midi); |
| setup_fail: |
| mutex_unlock(&opts->lock); |
| - kfree(midi); |
| + |
| return ERR_PTR(status); |
| } |
| |