Date: Thu, 31 Jan 2002 18:10:03 -0800 (PST) From: "Jin Guojun[ITG]" <j_guojun@lbl.gov> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/34502: ssh can crash the 4.5 system Message-ID: <200202010210.g112A3t87375@freefall.freebsd.org>
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The following reply was made to PR bin/34502; it has been noted by GNATS. From: "Jin Guojun[ITG]" <j_guojun@lbl.gov> To: Bill Fumerola <billf@mu.org> Cc: FreeBSD-gnats-submit@freebsd.org Subject: Re: bin/34502: ssh can crash the 4.5 system Date: Thu, 31 Jan 2002 18:00:48 -0800 Bill Fumerola wrote: > > On Thu, Jan 31, 2002 at 12:23:40PM -0800, Jin.Guojun@eubie.lbl.gov wrote: > > > >Description: > > Problem 1: > > ssh localhost > > cause system panic. A local user can use it to crash all 4.5 systems. > > obviously this doesn't happen for everyone. if a machine crashes, it has > a crashdump. there is ample documentation in the handbook on how to > retrieve this crashdump. more likely then not, ssh has nothing to do > with your machine crashing and its just tickling another bug in the > system. we don't know which one though, because you didn't include a > crashdump traceback. This is odd. The dump reports panic somewhere in tcp_input(). So, I recompiled all tcp_*.o with -g option (not entire kernel), then problem goes away. A couple of things I encounted during the installation was some /dev/md0 errors related to two things: (1) when entired a wrong DNS IP, after system hanging for a while, typed in a correct IP, the system did not accept the new one and keep hanging. Hit ^C to restart the installation over, then saw a /dev/md0 error. (2) when read mfsroot, I saw /dev/md0 errors. This type error may cause installation failure. However, I have no idea what really caused /dev/md0 errors. The source I download was a few of hours prior to the 4.5-RELEASE stably released to ftp.freebsd.org. I will try to download the 4.5 source again and reinstall some systems to see if problem still persists. -Jin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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