| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 129/151] media: b2c2-flexcop-usb: add sanity checking | Date | Wed, 27 Nov 2019 21:31:52 +0100 |
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From: Oliver Neukum <oneukum@suse.com>
commit 1b976fc6d684e3282914cdbe7a8d68fdce19095c upstream.
The driver needs an isochronous endpoint to be present. It will oops in its absence. Add checking for it.
Reported-by: syzbot+d93dff37e6a89431c158@syzkaller.appspotmail.com Signed-off-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/media/usb/b2c2/flexcop-usb.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/media/usb/b2c2/flexcop-usb.c +++ b/drivers/media/usb/b2c2/flexcop-usb.c @@ -538,6 +538,9 @@ static int flexcop_usb_probe(struct usb_ struct flexcop_device *fc = NULL; int ret; + if (intf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) { err("out of memory\n"); return -ENOMEM;
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