diff options
| author | Zhang Qilong <zhangqilong3@huawei.com> | 2020-11-17 05:16:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-02 10:34:44 +0300 |
| commit | e4c42e8bb567f130aeae98a7db9b8cb43a6d58e1 (patch) | |
| tree | 041457b52802706ebf7b41ee369ff5f2b115881f | |
| parent | aa0d0fbd1ff46bcf2bf5d22ae8487db25f4feff7 (diff) | |
| download | linux-e4c42e8bb567f130aeae98a7db9b8cb43a6d58e1.tar.xz | |
usb: gadget: f_midi: Fix memleak in f_midi_alloc
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>
| -rw-r--r-- | drivers/usb/gadget/function/f_midi.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 71cf552b8828..34c0a385516e 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -1303,7 +1303,7 @@ static struct usb_function *f_midi_alloc(struct usb_function_instance *fi) 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; @@ -1315,7 +1315,7 @@ static struct usb_function *f_midi_alloc(struct usb_function_instance *fi) 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); @@ -1331,9 +1331,13 @@ static struct usb_function *f_midi_alloc(struct usb_function_instance *fi) return &midi->func; +midi_free: + if (midi) + kfree(midi->id); + kfree(midi); setup_fail: mutex_unlock(&opts->lock); - kfree(midi); + return ERR_PTR(status); } |