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Subject: [media] dib0700: fix NULL-deref at probe Author: Johan Hovold <[email protected]> Date: Mon Mar 13 09:53:54 2017 -0300 Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: c4018fa2e4c0 ("[media] dib0700: fix RC support on Hauppauge Nova-TD") Cc: stable <[email protected]> # 3.16 Cc: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Johan Hovold <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/media/usb/dvb-usb/dib0700_core.c | 3 +++ 1 file changed, 3 insertions(+) --- diff --git a/drivers/media/usb/dvb-usb/dib0700_core.c b/drivers/media/usb/dvb-usb/dib0700_core.c index dd5edd3a17ee..08acdd32e412 100644 --- a/drivers/media/usb/dvb-usb/dib0700_core.c +++ b/drivers/media/usb/dvb-usb/dib0700_core.c @@ -809,6 +809,9 @@ int dib0700_rc_setup(struct dvb_usb_device *d, struct usb_interface *intf) /* Starting in firmware 1.20, the RC info is provided on a bulk pipe */ + if (intf->altsetting[0].desc.bNumEndpoints < rc_ep + 1) + return -ENODEV; + purb = usb_alloc_urb(0, GFP_KERNEL); if (purb == NULL) return -ENOMEM; _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
