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On 01/10/2011 06:40 PM, Vadym Chepkov wrote:
> Hi,
>
> Is it safe to permit these?
Safe yes. It wants to read the /usr/tmp symlink which is labelled usr_t.
The question is:
Should this /usr/tmp symlink be labelled usr_t in the first place, or
should it be labelled tmp_t.
That is a matter of opinion.
I decided to label it tmp_t and then call:
files_read_generic_tmp_symlinks(nscd_t)
But in Fedora i guess you would call:
files_read_usr_symlinks(nscd_t)
Either is fine i believe.
> selinux-policy-3.9.7-18.fc14.noarch
>
> # ausearch -m avc -ts yesterday
> ----
> time->Sun Jan 9 11:23:14 2011
> type=SYSCALL msg=audit(1294590194.604:12): arch=40000003 syscall=5 success=yes exit=18 a0=57b497 a1=0 a2=1b6 a3=58856a items=0 ppid=1 pid=997 auid=4294967295 uid=28 gid=28 euid=28 suid=28 fsuid=28 egid=28 sgid=28 fsgid=28 tty=(none) ses=4294967295 comm="nscd" exe="/usr/sbin/nscd" subj=system_u:system_r:nscd_t:s0 key=(null)
> type=AVC msg=audit(1294590194.604:12): avc: denied { read } for pid=997 comm="nscd" name="/" dev=dm-2 ino=2 scontext=system_u:system_r:nscd_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=dir
> ----
> time->Sun Jan 9 11:23:14 2011
> type=SYSCALL msg=audit(1294590194.604:13): arch=40000003 syscall=195 success=yes exit=0 a0=57b49c a1=ae2f16bc a2=29fff4 a3=3 items=0 ppid=1 pid=997 auid=4294967295 uid=28 gid=28 euid=28 suid=28 fsuid=28 egid=28 sgid=28 fsgid=28 tty=(none) ses=4294967295 comm="nscd" exe="/usr/sbin/nscd" subj=system_u:system_r:nscd_t:s0 key=(null)
> type=AVC msg=audit(1294590194.604:13): avc: denied { read } for pid=997 comm="nscd" name="tmp" dev=dm-0 ino=15581 scontext=system_u:system_r:nscd_t:s0 tcontext=system_u:object_r:usr_t:s0 tclass=lnk_file
> ----
> time->Sun Jan 9 11:41:04 2011
> type=SYSCALL msg=audit(1294591264.449:7): arch=40000003 syscall=195 success=yes exit=0 a0=3f049c a1=ae9f964c a2=38bff4 a3=3 items=0 ppid=1 pid=973 auid=4294967295 uid=28 gid=28 euid=28 suid=28 fsuid=28 egid=28 sgid=28 fsgid=28 tty=(none) ses=4294967295 comm="nscd" exe="/usr/sbin/nscd" subj=system_u:system_r:nscd_t:s0 key=(null)
> type=AVC msg=audit(1294591264.449:7): avc: denied { read } for pid=973 comm="nscd" name="tmp" dev=dm-0 ino=15581 scontext=system_u:system_r:nscd_t:s0 tcontext=system_u:object_r:usr_t:s0 tclass=lnk_file
> ----
> time->Sun Jan 9 11:41:04 2011
> type=SYSCALL msg=audit(1294591264.448:6): arch=40000003 syscall=5 success=yes exit=16 a0=3f0497 a1=0 a2=1b6 a3=3fd56a items=0 ppid=1 pid=973 auid=4294967295 uid=28 gid=28 euid=28 suid=28 fsuid=28 egid=28 sgid=28 fsgid=28 tty=(none) ses=4294967295 comm="nscd" exe="/usr/sbin/nscd" subj=system_u:system_r:nscd_t:s0 key=(null)
> type=AVC msg=audit(1294591264.448:6): avc: denied { read } for pid=973 comm="nscd" name="/" dev=dm-2 ino=2 scontext=system_u:system_r:nscd_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=dir
>
>
>
>
> --
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