On 07/08/2014 03:35 PM, Stephen Smalley wrote: > On 07/08/2014 03:21 PM, Steve Lawrence wrote: >> On 07/07/2014 10:45 AM, Dominick Grift wrote: >>> On Mon, 2014-07-07 at 16:24 +0200, Dominick Grift wrote: >>>> On Mon, 2014-07-07 at 10:00 -0400, Steve Lawrence wrote: >>>> >>>>> I can't reproduce the problem with my test policies. The typechange >>>>> statements look like they are correctly inserted into the binary and I >>>>> am seeing the expected type changes at runtime. >>>>> >>>>> Is this with your monogam policy? >>>>> >>>> No, that one is no longer maintained. >>>> >>>> It is this very small base policy: >>>> >>>> https://github.com/doverride/e145 >>>> >>> Note though, with that version, that there is no type_change rule from >>> devpts_t to device_session_pts_t currently (so if you were to test this >>> with sshd then it would be lacking the type change rule) >>> >>> Either insert that type_change rule manually or test it with the (local) >>> login program since there is a type_change session_t >>> device_tty_t:chr_file device_session_tty_t rule present. >>> >>> There is also a conditional type change rule for console_device_t to >>> device_session_tty_t. >>> >>> I cannot imagine me having overlooked anything. Since there are only two >>> domains (system_t and session_t), and both are virtually unconfined. >>> >>> >> Ok, finally managed to track down this issue. Turns out to be an >> ordering problem. You have your classes listed in alphabetical order. >> Order shouldn't matter with CIL and everything should work correctly, >> and in most cases is does. However, we assign integer values to each >> class based on the order we see them. So the first one we see gets value >> 1, second gets 2, etc. If these values don't match up with what >> userspace and the kernel expect them to be, things break. > Kernel and newer userspace code performs dynamic lookup of class/perm > values from strings and handles mapping their own internal indices to > the policy-defined values. So this points to a need to update > pam_selinux and other older code to map via string_to_security_class(). Please open a bug on pam. >> So the temporary solution is to reorder your class statements so that >> they are in the order defined in flask.h [1] so they get the right values. >> >> The long term solution is to add a new statement to CIL (classorder, >> similar to sidorder) that defines this order, allowing the class >> definitions to appear in any order. >> >> Thanks, >> - Steve >> >> [1] >> https://github.com/SELinuxProject/selinux/blob/master/libselinux/include/selinux/flask.h > _______________________________________________ > Selinux mailing list > Selinux@xxxxxxxxxxxxx > To unsubscribe, send email to Selinux-leave@xxxxxxxxxxxxx. > To get help, send an email containing "help" to Selinux-request@xxxxxxxxxxxxx. > > _______________________________________________ Selinux mailing list Selinux@xxxxxxxxxxxxx To unsubscribe, send email to Selinux-leave@xxxxxxxxxxxxx. To get help, send an email containing "help" to Selinux-request@xxxxxxxxxxxxx.
