On Wed, Aug 10, 2011 at 12:38:17AM +0100, Al Viro wrote: > * tty-on-xterm sometimes crashes on the first keysyms reaching it; > as far as I can tell, it's something related to SIGWINCH handling - whether > it happens or not depends on the way xterm windows are laid out and flipping > between them first seems to prevent that shit. If it hasn't happened at once, > it won't happen at all... Something in drivers/chan or drivers/line, most > likely...
FWIW, what I'm seeing there is chan_interrupt() with tty that has definitely been kfree'd. What happens is that we have several opened files for given tty and they all get closed in parallel. Now, ->release() of tty calls ->close() of driver (line_close() in this case) and then gets around to decrementing tty->count. As the result, *all* callers of line_close() see line->tty->count > 1 and leave line->tty not reset to NULL. Oops... Moral: do not use the counters on upper layer objects unless you know what you are doing *and* know what will happen to that upper layer in years to come... ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
