unionfs or tmpfs Kernel Panic on 10.2-BETA1

David Wolfskill david at catwhisker.org
Sat Jul 18 16:12:56 UTC 2015

On Sat, Jul 18, 2015 at 11:54:59AM -0400, Shawn Webb wrote:
> Looks like there's some locking issues in 10.2-BETA1/amd64. I'm at revision bf2d0b176566519b95f21d01cc101f4b60247ab8 in this repo:
> https://github.com/HardenedBSD/hardenedBSD/tree/hardened/experimental/opnsense-10-stable
> === Begin Log ===
> Trying to mount root from ufs:/dev/ufs/HardenedBSD_Install [ro,noatime]...
> Mounting filesystems...
> tunefs: soft updates set
> tunefs: file system reloaded
> camcontrol: subcommand "identify" requires a valid device identifier
> panic: __lockmgr_args: recursing on non recursive lockmgr tmpfs @ /usr/src/sys/kern/vfs_subr.c:2174
> ...
> If there's anything you need from me, please let me know. It's 100% reproducible at bootup on one of my systems.
> ...

I mount /tmp as a tmpfs on all of my FreeBSD systems, and have been
tracking stable/10 daily for some time (ref.

I have not seen anything like the above.

I am presently running:

FreeBSD g1-245.catwhisker.org 10.2-BETA2 FreeBSD 10.2-BETA2 #96  r285668M/285670:1001519: Sat Jul 18 04:07:25 PDT 2015     root at g1-245.catwhisker.org:/common/S2/obj/usr/src/sys/CANARY  amd64

on my laptop; on the system where I'm reading & writing mail, it's:

FreeBSD albert.catwhisker.org 10.2-BETA1 FreeBSD 10.2-BETA1 #418  r285410M/285418:1001519: Sun Jul 12 04:37:35 PDT 2015     root at freebeast.catwhisker.org:/common/S2/obj/usr/src/sys/ALBERT  amd64

I am, however, not using unionfs.

I have a test system available, if that might help (e.g., for trying
to reproduce the problem).

David H. Wolfskill				david at catwhisker.org
Those who murder in the name of God or prophet are blasphemous cowards.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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