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fedora-selinux: Re: Strange denials

Re: Strange denials

From: Vadym Chepkov <chepkov_at_nospam>
Date: Sat Jul 04 2009 - 15:19:33 GMT
To: Kévin GUERIN <leguerinos@gmail.com>

I barely redirect output of a cron job to /dev/null :(

Is the a way to run cron unconfined? I don't see any boolean anymore.  

Sincerely yours,
  Vadym Chepkov

  • On Sat, 7/4/09, Kévin GUERIN <leguerinos@gmail.com> wrote:

> From: Kévin GUERIN <leguerinos@gmail.com>
> Subject: Re: Strange denials
> To: "Vadym Chepkov" <chepkov@yahoo.com>
> Cc: "Fedora SELinux" <fedora-selinux-list@redhat.com>
> Date: Saturday, July 4, 2009, 10:55 AM
> winbindd is running with no MCS
> categories and tries to access a file with c0.c0123.
>
> Access will be granted only if winbindd runs with all the
> categories that has the file it wants to interact with.
>
> Kévin
>
>
> 2009/7/4 Vadym Chepkov <chepkov@yahoo.com>
>
>
>
> Ok, I am lost
>
>
>
> I clearly allowed this.
>
>
>
> allow winbind_t crond_t:fifo_file write;
>
>
>
> I can see it in the policy:
>
> sesearch --all --source winbind_t --target crond_t
>
> Found 3 semantic av rules:
>
>   allow winbind_t crond_t : process sigchld ;
>
>   allow winbind_t crond_t : fd use ;
>
>   allow winbind_t crond_t : fifo_file { ioctl read write
> getattr lock append open } ;
>
>
>
> Why do I get denial anyway?
>
>
>
> time->Sat Jul  4 10:28:01 2009
>
> type=SYSCALL msg=audit(1246717681.676:10436): arch=40000003
> syscall=11 success=yes exit=0 a0=9073c10 a1=9073358
> a2=90732a8 a3=9073358 items=0 ppid=20323 pid=20324 auid=0
> uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
> tty=(none) ses=777 comm="winbindd"
> exe="/usr/sbin/winbindd"
> subj=system_u:system_r:winbind_t:s0 key=(null)
>
>
> type=AVC msg=audit(1246717681.676:10436): avc:  denied  {
> write } for  pid=20324 comm="winbindd"
> path="pipe:[611496]" dev=pipefs ino=611496
> scontext=system_u:system_r:winbind_t:s0
> tcontext=unconfined_u:system_r:crond_t:s0-s0:c0.c1023
> tclass=fifo_file
>
>
>
>
>
>
> Sincerely yours,
>
>  Vadym Chepkov
>
>
>
> --
>
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>
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>
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>
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