cx231xx-cards: fix NULL-deref on missing association descriptor
commitpull/10/head6c3b047fa2
upstream. Make sure to check that we actually have an Interface Association Descriptor before dereferencing it during probe to avoid dereferencing a NULL-pointer. Fixes:e0d3bafd02
("V4L/DVB (10954): Add cx231xx USB driver") Reported-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Johan Hovold <johan@kernel.org> Tested-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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cfec97f26d
commit
5a482b8a75
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@ -1684,7 +1684,7 @@ static int cx231xx_usb_probe(struct usb_interface *interface,
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nr = dev->devno;
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assoc_desc = udev->actconfig->intf_assoc[0];
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if (assoc_desc->bFirstInterface != ifnum) {
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if (!assoc_desc || assoc_desc->bFirstInterface != ifnum) {
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dev_err(d, "Not found matching IAD interface\n");
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retval = -ENODEV;
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goto err_if;
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