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NFC: pn533: fix use-after-free and memleaks 

The driver would fail to deregister and its class device and free
related resources on late probe errors.

Reported-by: syzbot+cb035c75c03dbe34b796@syzkaller.appspotmail.com
Fixes: 32ecc75ded ("NFC: pn533: change order operations in dev registation")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
alistair/sunxi64-5.4-dsi
Johan Hovold 2019-10-07 18:40:59 +02:00 committed by Jakub Kicinski
parent 4b793fecca
commit 6af3aa57a0
1 changed files with 8 additions and 1 deletions
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9
drivers/nfc/pn533/usb.c
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@ -547,18 +547,25 @@ static int pn533_usb_probe(struct usb_interface *interface,
rc = pn533_finalize_setup(priv);
if (rc)
goto error;
goto err_deregister;
usb_set_intfdata(interface, phy);
return 0;
err_deregister:
pn533_unregister_device(phy->priv);
error:
usb_kill_urb(phy->in_urb);
usb_kill_urb(phy->out_urb);
usb_kill_urb(phy->ack_urb);
usb_free_urb(phy->in_urb);
usb_free_urb(phy->out_urb);
usb_free_urb(phy->ack_urb);
usb_put_dev(phy->udev);
kfree(in_buf);
kfree(phy->ack_buffer);
return rc;
}