DragonFly-2.1.1.426.gc0721f master sys/kern vfs_syscalls.c

[Nicolas Thery]

2009/1/17 Matthew Dillon <dillon at crater.dragonflybsd.org>:
>
> commit c0721f5f93083c622e2118a55eb1a2ef1725bc4b
> Author: Matthew Dillon <dillon at apollo.backplane.com>
> Date:   Sat Jan 17 14:24:52 2009 -0800
>
>    Reorder an unlock to avoid a recursive vnode lock in the sys_mount() code.
>    This fixes a panic for double-mount_null cases.
>
>    Reported-by: Nicolas Thery <nthery at gmail.com>
>    Submitted-by: Johannes Hofmann <Johannes.Hofmann at gmx.de>

Well, actually Sascha reported it.  I just tried to reproduce it.