Re: Mangled file system directory panic

[Jarle Greipsland <jarle%uninett.no@localhost>]

[ Followups to port-i386, please ]
I wrote[1]:
> I have a system where I can almost deterministally provoke a
> kernel panic by doing a 'tar -zxpf comp.tgz'.
> 
> The panic messages reported by crash is something like:
> System panicked: /mnt: bad dir ino 42369 at offset 560: NUL in name [] i=0, namlen=4
> 
[ ... ]
> NetBSD 7.99.34 (DARLING) #1: Sat Jul 30 20:01:15 CEST 2016
> 	jarle%singsaker.uninett.no@localhost:/usr/obj/sys/arch/i386/compile/DARLING
> total memory = 127 MB
> avail memory = 120 MB
> timecounter: Timecounters tick every 10.000 msec
> timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
> Generic PC
> mainbus0 (root)
> cpu0 at mainbus0
> cpu0: Intel 486-class
> eisa0 at mainbus0
> isa0 at mainbus0
[ ... ]

I have since managed to pin-point where things started to go
wrong -- CVS commit-wise.  A -current kernel from CVS with tag
'2016.04.03.03.00.00' works just fine, while a kernel with tag
'2016.04.03.07.00.00' panics.  The only significant commit in
that interval is a change of compiler for the i386 port to GCC
5.3 (http://mail-index.netbsd.org/source-changes/2016/04/03/msg073782.html).

Are there known bugs in our compiler for (plain) i486 systems?

					-jarle

[1]: http://mail-index.netbsd.org/current-users/2016/07/30/msg029876.html
--
You are in a dark room with a compiler, emacs, an internet connection,
and a thermos of coffee.
Your move ?				-- David A. Honig