tree 22936f2b3784c4d89c4f1e2263b528167f42e683
parent 12da401e0d616f738c8b8a368d1f63f365cc78e4
author Christian Lamparter <chunkeey@web.de> 1232407677 +0100
committer John W. Linville <linville@tuxdriver.com> 1232650502 -0500

p54usb: fix nasty use after free

In theory, the firmware acks the received a data frame, before signaling the driver to free it again.
However Artur Skawina <art.08.09@gmail.com> has shown that it can happen in reverse order as well.
This is very bad and could lead to memory corruptions, oopses and panics.

Thanks to Artur Skawina <art.08.09@gmail.com> for reporting and debugging this issue.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Tested-by: Artur Skawina <art.08.09@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>