Patch from Ian Abbott <abbotti.uk> This patch limits the amount of outstanding 'write' data that can be queued up for the ftdi_sio driver, to prevent userspace DoS attacks (or simple accidents) that use up all the system memory by writing lots of data to the serial port. http://www.kernel.org/git/?p=linux/kernel/git/gregkh/patches.git;a=blob;h=4b4d9cfea17618b80d3ac785b701faeaf60141f1;hb=396eb2aac550ec55856c6843ef9017e800c3d656;f=usb/usb-serial-ftdi_sio-prevent-userspace-dos.patch
Created attachment 132097 [details] Candidate #1 - Abbreviated version for RHEL-4 I threw out the unrelated garbage from the receive path.
committed in stream E5 build 42.0.1. A test kernel with this patch is available from http://people.redhat.com/~jbaron/rhel4/
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0617.html
committed in stream U5 build 42.4. A test kernel with this patch is available from http://people.redhat.com/~jbaron/rhel4/