cvs commit: src/sys/kern kern_descrip.c

Gleb Smirnoff glebius at
Mon Mar 20 07:48:08 UTC 2006

On Sat, Mar 18, 2006 at 11:27:22PM +0000, Christian S.J. Peron wrote:
C> csjp        2006-03-18 23:27:22 UTC
C>   FreeBSD src repository
C>   Modified files:
C>     sys/kern             kern_descrip.c 
C>   Log:
C>   Back out fd optimization introduced in revision 1.280 as it appears to be
C>   really breaking things. Simple "close(0); dup(fd)" does not return descriptor
C>   "0" in some cases. Further, this change also breaks some MAC interactions with
C>   mac_execve_will_transition().  Under certain circumstances, fdcheckstd() can
C>   be called in execve(2) causing an assertion that checks to make sure that
C>   stdin, stdout and stderr reside at indexes 0, 1 and 2 in the process fd table
C>   to fail, resulting in a kernel panic when INVARIANTS is on.
C>   This should also kill the "dup(2) regression on 6.x" show stopper item on the
C>   6.1-RELEASE TODO list.
C>   This is a RELENG_6 candidate.
C>   PR:             kern/87208
C>   Silence from:   des
C>   MFC after:      1 week

Thanks, Christian!

Totus tuus, Glebius.

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