From d23b4c3ee2d5cbdeaec9f8e7d8a9bdcc73836fb9 Mon Sep 17 00:00:00 2001 From: Andrzej Pietrasiewicz Date: Thu, 16 Oct 2014 13:33:26 +0200 Subject: [PATCH] usb: gadget: f_midi: check kstrdup() return value kstrdup() might fail, so check its return value and react appropriately. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_midi.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index bf329578c957..a920eee9e878 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -654,6 +654,14 @@ static struct snd_rawmidi_ops gmidi_out_ops = { .trigger = f_midi_out_trigger }; +static inline void f_midi_unregister_card(struct f_midi *midi) +{ + if (midi->card) { + snd_card_free(midi->card); + midi->card = NULL; + } +} + /* register as a sound "card" */ static int f_midi_register_card(struct f_midi *midi) { @@ -715,10 +723,7 @@ static int f_midi_register_card(struct f_midi *midi) return 0; fail: - if (midi->card) { - snd_card_free(midi->card); - midi->card = NULL; - } + f_midi_unregister_card(midi); return err; } @@ -967,15 +972,23 @@ int __init f_midi_bind_config(struct usb_configuration *c, midi->func.disable = f_midi_disable; midi->id = kstrdup(id, GFP_KERNEL); + if (id && !midi->id) { + status = -ENOMEM; + goto kstrdup_fail; + } midi->buflen = buflen; midi->qlen = qlen; status = usb_add_function(c, &midi->func); if (status) - goto setup_fail; + goto add_fail; return 0; +add_fail: + kfree(midi->id); +kstrdup_fail: + f_midi_unregister_card(midi); setup_fail: for (--i; i >= 0; i--) kfree(midi->in_port[i]); -- 2.20.1