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Subject: media: b2c2-flexcop-usb: add sanity checking
Author: Oliver Neukum <oneu...@suse.com>
Date: Tue Jul 30 09:48:27 2019 +0200
The driver needs an isochronous endpoint to be present. It will
oops in its absence. Add checking for it.
Reported-by: syzbot+d93dff37e6a89431c...@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneu...@suse.com>
Signed-off-by: Sean Young <s...@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>
drivers/media/usb/b2c2/flexcop-usb.c | 3 +++
1 file changed, 3 insertions(+)
---
diff --git a/drivers/media/usb/b2c2/flexcop-usb.c
b/drivers/media/usb/b2c2/flexcop-usb.c
index 4bf85e9b78b8..d1331f828108 100644
--- a/drivers/media/usb/b2c2/flexcop-usb.c
+++ b/drivers/media/usb/b2c2/flexcop-usb.c
@@ -544,6 +544,9 @@ static int flexcop_usb_probe(struct usb_interface *intf,
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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