On 2011-08-13 18:03, Robert Watson wrote:
> Author: rwatson
> Date: Sat Aug 13 16:03:40 2011
> New Revision: 224842
> URL: http://svn.freebsd.org/changeset/base/224842
> 
> Log:
>   When falloc() was broken into separate falloc_noinstall() and finstall(),
>   a bug was introduced in kern_openat() such that the error from the vnode
>   open operation was overwritten before it was passed as an argument to
>   dupfdopen().  This broke operations on /dev/{stdin,stdout,stderr}.  Fix
>   by preserving the original error number across finstall() so that it is
>   still available.
>   
>   Approved by:        re (kib)
>   Reported by:        cognet
> 
> Modified:
>   head/sys/kern/vfs_syscalls.c
> 

It might be worth mentioning this in UPDATING or similar, since a kernel
built with clang (I haven't tried gcc) during this window will make it
impossible to do a buildworld without first rebuilding the kernel with
this fix. It also seems to break at least portsnap, and possibly other
tools as well.

Regards!
-- 
Niclas Zeising
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