linux/drivers/isdn
Jia-Ju Bai a0d57a552b isdn: mISDN: hfcsusb: Fix possible null-pointer dereferences in start_isoc_chain()
In start_isoc_chain(), usb_alloc_urb() on line 1392 may fail
and return NULL. At this time, fifo->iso[i].urb is assigned to NULL.

Then, fifo->iso[i].urb is used at some places, such as:
LINE 1405:    fill_isoc_urb(fifo->iso[i].urb, ...)
                  urb->number_of_packets = num_packets;
                  urb->transfer_flags = URB_ISO_ASAP;
                  urb->actual_length = 0;
                  urb->interval = interval;
LINE 1416:    fifo->iso[i].urb->...
LINE 1419:    fifo->iso[i].urb->...

Thus, possible null-pointer dereferences may occur.

To fix these bugs, "continue" is added to avoid using fifo->iso[i].urb
when it is NULL.

These bugs are found by a static analysis tool STCheck written by us.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-07-27 13:29:39 -07:00
..
capi isdn: move capi drivers to staging 2019-05-31 11:17:41 +02:00
hardware isdn: mISDN: hfcsusb: Fix possible null-pointer dereferences in start_isoc_chain() 2019-07-27 13:29:39 -07:00
mISDN Linux 5.2-rc4 2019-06-14 14:18:53 -06:00
Kconfig isdn: move capi drivers to staging 2019-05-31 11:17:41 +02:00
Makefile isdn: move capi drivers to staging 2019-05-31 11:17:41 +02:00