"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.
- NFS server doesn't allow such operation.
Generally your NFS server needs to allow clients to access as
superuser.
- or other ...
J. R. Okajima
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