Re: kern/57246: NFS group permissions regression

["J. Hannken-Illjes" <hannken%mailbox.org@localhost>]

The following reply was made to PR kern/57246; it has been noted by GNATS.

From: "J. Hannken-Illjes" <hannken%mailbox.org@localhost>
To: NetBSD GNATS <gnats-bugs%netbsd.org@localhost>
Cc: 
Subject: Re: kern/57246: NFS group permissions regression
Date: Tue, 28 Feb 2023 15:36:30 +0100

 This failure can be reduced to:
 
 - Create a file xxx in a ffs file system, mode -rw-rw-r-- and
   make sure you are not the owner but the group member.
 
 - Try to touch this file (touch xxx) and get "Permission denied".
 
 Operation ufs_setattr() runs genfs_can_chtimes() ->
   VOP_ACCESSX( VWRITE_ATTRIBUTES ) ->
   ufs_accessx() ->
   vfs_unixify_accmode(&accmode),
 this translates VWRITE_ATTRIBUTES into VADMIN and the access
 check fails as we are not the owner.
 
 vfs_unixify_accmode() definitely needs work ...
 
 --
 J. Hannken-Illjes - hannken%mailbox.org@localhost