| Summary: | selabel_lookup() with MEDIA backend does not return default removable context | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Jan Zarsky <jzarsky> |
| Component: | libselinux | Assignee: | Vit Mojzis <vmojzis> |
| Status: | CLOSED ERRATA | QA Contact: | Jan Zarsky <jzarsky> |
| Severity: | low | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.4 | CC: | dapospis, dwalsh, lvrabec, mgrepl, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libselinux-2.5-13.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-10-30 09:34:40 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:3084 |
Description of problem: Manpage of selabel_media (selabel_lookup() function with MEDIA backend) states "Should there not be a valid entry in the media file, then the default removable_context file will be read (see removable_context(5)).", but it does not work. When I create a custom contexts file with no valid entry and supply it through SELABEL_OPT_PATH to selabel_open, selabel_lookup then produces error instead of returning default removable_context. Version-Release number of selected component (if applicable): libselinux-2.5-6.el7.x86_64 Steps to Reproduce: $ cat > bug.c <<EOF #include <stdio.h> #include <selinux/selinux.h> #include <selinux/label.h> char *custom_contexts_file = "my_contexts"; int main (int argc, char **argv) { struct selabel_handle *hnd = NULL; security_context_t selabel_context; struct selinux_opt selabel_option [] = { { SELABEL_OPT_PATH, custom_contexts_file } }; if ((hnd = selabel_open(SELABEL_CTX_MEDIA, selabel_option, 4)) == NULL) { perror("selabel_open - ERROR"); return 1; } if (selabel_lookup(hnd, &selabel_context, "floppy", 0) == -1) { perror("selabel_lookup - ERROR"); selabel_close(hnd); return 1; } printf("%s\n", selabel_context); freecon(selabel_context); selabel_close(hnd); return 0; } EOF $ gcc bug.c -o bug -lselinux $ cat > my_contexts <<EOF some_invalid_entry EOF $ Actual results: $ ./bug selabel_lookup - ERROR: No such file or directory $ Expected results: $ ./bug system_u:object_r:removable_device_t:s0 $ (should match /etc/selinux/targeted/contexts/removable_context) Additional info: The other option is that the manpage is out of date and should be updated.