/dev permissions after reboot (and panic)
pavalos at theshell.com
Sat Jul 16 22:11:30 PDT 2005
On Sat, Jul 16, 2005 at 09:52:33PM -0700, Peter Avalos wrote:
> On Sat, Jul 16, 2005 at 08:23:11PM -0700, Peter Avalos wrote:
> > On Sat, Jul 16, 2005 at 08:05:24PM -0700, Matthew Dillon wrote:
> > >
> > > :Content-Type: text/plain; charset=us-ascii
> > > :Content-Disposition: inline
> > > :
> > > :So every time I reboot, I get a panic (I believe someone else may
> > > :be having this problem too). I've included a capture of the ddb
> > > :session at the bottom. Unfortunately, I can't get a core dump.
> > > :But, what really sucks, is if I did a 'MAKEDEV all', permissions
> > > :in /dev get hosed when the machine comes back up. MAKEDEV is doing
> > > :the right thing, because I've checked to make sure the devices
> > > :have the correct permissions. When the machine comes back up,
> > > :things like null, zero, tty, lose their write permissions, which
> > > :hoses things up.
> > > :
> > > Which patch set is this with? The m_nextpkt != NULL is a warning
> > > rather a panic, but the patch set I sent today should have fixed that.
> > > The actual panic is occuring due to the buffers not being flushable,
> > > which sounds like a softupdates issue so if the sync commands don't
> > > fix the problem (or even if they do). See if turning off softupdates
> > > fixes the problem (which will tell me where to look).
> > >
> > That was with no patches...just straight-up HEAD. I'm compiling up a
> > new kernel with the SOCKBUF_DEBUG patchset right now, and I'll see if
> > that warning goes away. I'll also try turning off softupdates and see
> > what happens.
> I applied the SOCKBUF_DEBUG patch and rebooted. After the machine came up,
> I tried a MAKEDEV, sync, waited about a mintue, then rebooted. I then got
> this panic:
> panic: assertion: sb->sb_mb == m in sbunlinkmbuf
> mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
> boot() called on cpu#0
> Uptime: 3m22s
> Matt, as you know my remote console really sucks, so I wasn't able to
> get everything, but I did get a sucessfuly dump. That's uploading to
> leaf right now (*.12).
> Hopefully it's useful.
I forgot to mention that /dev permissions were screwed up as well.
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