drivers/input/serio/serport.c can lead to kernel panic in serio code followed by jbd's panic (probably due to random memory write, I don't now) and/or system lockup. Steps to exploit it: process 1: open() a tty device; TIOCSETD it to N_MOUSE; read() it. it will block. after that, process 2: open() the same device; TIOCSETD it to 0; TIOCSETD it to N_MOUSE; (not sure if it's necessary) kill() process 1;
This is a dup of bug 131672, but I'll leave this open since it's for Derry (as opposed to Pensacola).
For reference the fix that got committed upstream into 2.4.29: http://linux.bkbits.net:8080/linux-2.4/cset@41c3801dxJnuBSRCpUiMRkwItPHjWA
Jim - Update with information regarding U7 target.
This is a dup of 131672, which is assigned to jbaron. Neither of these are likely to make U7
The fix has been deemed too invasive for a RHEL2.1 update at this time. Closing as WONTFIX.