Date: Wed, 11 Jul 2007 20:48:54 -0700 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Doug White <dwhite@gumbysoft.com> Cc: tcsh-bugs@mx.gw.com, current@freebsd.org Subject: Re: tcsh backtick hang info Message-ID: <20070712034854.GA84554@troutmask.apl.washington.edu> In-Reply-To: <20070711191310.M90716@carver.gumbysoft.com> References: <20070711191310.M90716@carver.gumbysoft.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Jul 11, 2007 at 07:28:55PM -0700, Doug White wrote: > > In this case it appears to be an improperly placed bump to the SIGCHLD > disable count that is held over a call to pjwait(). I haven't yet > determined the call stack (and gdb cannot debug tcsh at the moment) so I > need to continue instrumenting the code to figure out what higher level > function is disabling SIGCHLD and then calling something that eventually > calls pjwait(). > Signal handling is completely and utterly messed up in tcsh 6.15.0. I've asked more than once to have the 6.15.0 import reverted in the FreeBSD tree. Having broken signal handling for the default shell of root suggests that there is a likely exploit waiting in the wings. -- Steve
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070712034854.GA84554>