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| author | Vladis Dronov <vdronov@redhat.com> | 2016-01-31 14:14:52 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-04-20 15:58:54 -0300 |
| commit | d5468d7afaa9c9e961e150f0455a14a9f4872a98 (patch) | |
| tree | 8e5526795b8650ce7cd5a9414717dc494e01f6a4 /Documentation/pi-futex.txt | |
| parent | 2c1f6951a8a82e6de0d82b1158b5e493fc6c54ab (diff) | |
[media] usbvision: revert commit 588afcc1
Commit 588afcc1c0e4 ("[media] usbvision fix overflow of interfaces
array")' should be reverted, because:
* "!dev->actconfig->interface[ifnum]" won't catch a case where the value
is not NULL but some garbage. This way the system may crash later with
GPF.
* "(ifnum >= USB_MAXINTERFACES)" does not cover all the error
conditions. "ifnum" should be compared to "dev->actconfig->
desc.bNumInterfaces", i.e. compared to the number of "struct
usb_interface" kzalloc()-ed, not to USB_MAXINTERFACES.
* There is a "struct usb_device" leak in this error path, as there is
usb_get_dev(), but no usb_put_dev() on this path.
* There is a bug of the same type several lines below with number of
endpoints. The code is accessing hard-coded second endpoint
("interface->endpoint[1].desc") which may not exist. It would be great
to handle this in the same patch too.
* All the concerns above are resolved by already-accepted commit fa52bd50
("[media] usbvision: fix crash on detecting device with invalid
configuration")
* Mailing list message:
http://www.spinics.net/lists/linux-media/msg94832.html
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org> # for v4.5
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'Documentation/pi-futex.txt')