Date: Mon, 21 Apr 1997 15:20:36 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-bugs@freebsd.org Cc: Shimon@i-Connect.Net Subject: Re: Mystery of the X11 Panic... Message-ID: <19970421152036.AM09487@uriah.heep.sax.de> References: <199704210852.SAA27852@godzilla.zeta.org.au> <199704211031.DAA03600@root.com>
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As David Greenman wrote:
> >This means that cdevsw[maj]->d_open is bad (probably null) although
> >cdevsw[maj] != NULL. This might be caused by a buggy or stale LKM.
Nope, Bruce:
if ( (cdevsw[maj] == NULL) || (cdevsw[maj]->d_open == NULL))
^^^^^^^^^^^^^^^^^^^
return ENXIO;
This case is tested, and it's actually this test itself that causes
the panic.
> ...or it could be caused by the bug in kern_exec.c, which could have
> mangled adjacent buffers or possibly random kernel memory. It seems
> to involve bash and the kern_exec.c bug was triggered when running small
> shell scripts.
This seems more reasonable after reading that piece of code.
Simon didn't tell us the faulting VA, but i bet it's not right NULL.
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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