Dear Junjiro,
On Friday 05 February 2010, 10:30:24 Hans-Peter Jansen wrote:
> On Friday 05 February 2010, 04:52:34 sf...@users.sourceforge.net wrote:
> > "Hans-Peter Jansen":
> > > Feb 4 22:21:09 x130 postfix/postfix-script[6130]: starting the
> > > Postfix mail system Feb 4 22:21:09 x130 postfix/master[6131]: fatal:
> > > fifo_listen: fchmod public/pickup: Operation not permitted
> > >
> > > Here's the relevant trace.
> > >
> > > 7621 geteuid32() = 0
> > > 7621 setresgid32(-1, 51, -1) = 0
> > > 7621 setgroups32(1, [51]) = 0
> > > 7621 setresuid32(-1, 51, -1) = 0
> > > 7621 time(NULL) = 1265319834
> > > 7621 send(3, "<22>Feb 4 22:43:54 postfix/master[7621]: set_eugid:
> > > euid 51 egid 51", 68, MSG_NOSIGNAL) = 68 7621
> > > unlink("public/pickup") = 0
> > > 7621 mknod("public/pickup", S_IFIFO|0622) = 0
> > > 7621 open("public/pickup", O_RDWR|O_NONBLOCK) = 12
> > > 7621 poll([{fd=12, events=POLLIN}], 1, 0) = 0 (Timeout)
> > > 7621 fstat64(12, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
> > > 7621 fchmod(12, 0622) = -1 EPERM (Operation not
> > > permitted) 7621 time(NULL) = 1265319834
> > > 7621 send(3, "<18>Feb 4 22:43:54 postfix/master[7621]:
> > > fatal: fifo_listen: fchmod public/pickup: Operation not permitted",
> > > 107, MSG_NOSIGNAL) = 107
> > >
> > > You mentioned in the thread, that NFS may also uses ->private_data.
> > > Could this be the reason for this issue?
> >
> > I don't know.
> > The case in last November was a problem in fchown of AppArmor, but
> > yours is fchmod.
> > The reason can be any of these.
> > - AppArmor has a simler problem in fchmod.
> > According to Ubuntu Intrepid source files, fchmod doesn't have the
> > problem. But I am not sure whether linux/fs/open.c in openSUSE is the
> > same one in Intrepid. I have not read the source files of openSUSE
> > 11.1.
>
> I will check.
I cannot find any reference to fchmod at all in aufs2. What am I missing?
Thanks,
Pete
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