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media: b2c2-flexcop-usb: add sanity checking

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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>
This commit is contained in:
Oliver Neukum 2019-07-30 09:48:27 +02:00 committed by Mauro Carvalho Chehab
parent d52741728a
commit 1b976fc6d6
1 changed files with 3 additions and 0 deletions
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3
drivers/media/usb/b2c2/flexcop-usb.c
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@ -544,6 +544,9 @@ static int flexcop_usb_probe(struct usb_interface *intf,
struct flexcop_device *fc = NULL; struct flexcop_device *fc = NULL;
int ret; int ret;
if (intf->cur_altsetting->desc.bNumEndpoints < 1)
return -ENODEV;
if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) { if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
err("out of memory\n"); err("out of memory\n");
return -ENOMEM; return -ENOMEM;