[28553] in Kerberos
Re: wrong error checking in kprop.c (bug?)
daemon@ATHENA.MIT.EDU (Ludek Finstrle)
Tue Oct 9 11:46:59 2007
Date: Tue, 9 Oct 2007 11:36:14 +0200
From: Ludek Finstrle <ludek.finstrle@pzkagis.cz>
To: kerberos@mit.edu
Message-ID: <20071009093614.GC9022@pzkagis.cz>
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Hello again,
I've found the reason of the problem. It's simple reproducible
on linux with
chattr +i /etc/krb5.conf
(or some another way to disable write access to the file).
Regards,
Luf
Tue, Oct 09, 2007 at 09:38:29AM +0200, Ludek Finstrle napsal(a):
> Hello,
>
> suddenly I get "database locked" from kprop since there is no lock
> on the dump (even strace show fcntl returns 0 - success).
> I found the problem in src/slave/krpop.c. There are these lines:
>
> err = krb5_lock_file(context, fd,
> KRB5_LOCKMODE_SHARED|KRB5_LOCKMODE_DONTBLOCK);
> if (err == EAGAIN || err == EWOULDBLOCK || errno == EACCES) {
> com_err(progname, 0, "database locked");
> exit(1);
> } else if (err) {
> com_err(progname, err, "while trying to lock '%s'", dbpathname);
> exit(1);
> }
>
> There is errno instead of err in the if statement. I see the same
> problem in ftp://athena-dist.mit.edu/pub/kerberos/dist/vaporware-r-us/krb5-1.6-current.tar.gz too.
>
> Please could someone fix the problem? I'm unable to use krb5-send-pr
> due to problems.
>
> If you want more information, please contact me directly as I'm not list
> member.
>
> Thanks,
>
> Ludek Finstrle
>
> P.S. I'm going to trace down why krb5_init_context returns 0 and set
> errno to EACCESS.
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