Bug 2127950
| Summary: | Package needs to be recompiled to list capability 40 properly | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 9 | Reporter: | Renaud Métrich <rmetrich> |
| Component: | libcap-ng | Assignee: | Anderson Sasaki <ansasaki> |
| Status: | CLOSED MIGRATED | QA Contact: | BaseOS QE Security Team <qe-baseos-security> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9.4 | CC: | rsroka |
| Target Milestone: | rc | Keywords: | MigratedToJIRA, Triaged |
| Target Release: | --- | Flags: | pm-rhel:
mirror+
|
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2023-09-01 22:42:25 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: | |
| Embargoed: | |||
Moving to RHEL 9 as we do not plan to do any other non-critical bugfixes in RHEL8. Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug. This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there. To find the migrated issue, look in the "Links" section for a direct link to the new issue location. The issue key will have an icon of 2 footprints next to it, and begin with "RHEL-" followed by an integer. You can also find this issue by visiting https://issues.redhat.com/issues/?jql= and searching the "Bugzilla Bug" field for this BZ's number, e.g. a search like: "Bugzilla Bug" = 1234567 In the event you have trouble locating or viewing this issue, you can file an issue by sending mail to rh-issues. Users watching this BZ may not be automatically added to the Jira ticket. Be sure to add yourself to the Watchers field in the Jira issue if you desire to continue following this issue. |
Description of problem: "setpriv --list-caps" relies on libcap-ng library to print the mapping between the capability number and human-readable string, e.g.: -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- # /usr/bin/setpriv --list-caps chown dac_override dac_read_search : perfmon bpf cap_40 -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- On RHEL8.5+, the last capability is displayed as "cap_40" instead of "checkpoint_restore" because the static table "captab" doesn't contain the entry: -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- # gdb --args /usr/bin/setpriv --list-caps [...] (gdb) break capng_lookup_number (gdb) run (gdb) p captab $4 = {{value = 0, offset = 0}, {value = 1, offset = 6}, {value = 2, offset = 19}, {value = 3, offset = 35}, { value = 4, offset = 42}, {value = 5, offset = 49}, {value = 6, offset = 54}, {value = 7, offset = 61}, { value = 8, offset = 68}, {value = 9, offset = 76}, {value = 10, offset = 92}, {value = 11, offset = 109}, { value = 12, offset = 123}, {value = 13, offset = 133}, {value = 14, offset = 141}, {value = 15, offset = 150}, { value = 16, offset = 160}, {value = 17, offset = 171}, {value = 18, offset = 181}, {value = 19, offset = 192}, { value = 20, offset = 203}, {value = 21, offset = 213}, {value = 22, offset = 223}, {value = 23, offset = 232}, { value = 24, offset = 241}, {value = 25, offset = 254}, {value = 26, offset = 263}, {value = 27, offset = 278}, { value = 28, offset = 284}, {value = 29, offset = 290}, {value = 30, offset = 302}, {value = 31, offset = 316}, { value = 32, offset = 324}, {value = 33, offset = 337}, {value = 34, offset = 347}, {value = 35, offset = 354}, { value = 36, offset = 365}, {value = 37, offset = 379}, {value = 38, offset = 390}, {value = 39, offset = 398}} (gdb) p captab_msgstr $5 = {{str23 = "chown", str24 = "dac_override", str25 = "dac_read_search", str26 = "fowner", str27 = "fsetid", str28 = "kill", str29 = "setgid", str30 = "setuid", str31 = "setpcap", str32 = "linux_immutable", str33 = "net_bind_service", str34 = "net_broadcast", str35 = "net_admin", str36 = "net_raw", str37 = "ipc_lock", str38 = "ipc_owner", str39 = "sys_module", str40 = "sys_rawio", str41 = "sys_chroot", str42 = "sys_ptrace", str43 = "sys_pacct", str44 = "sys_admin", str45 = "sys_boot", str46 = "sys_nice", str47 = "sys_resource", str48 = "sys_time", str49 = "sys_tty_config", str50 = "mknod", str51 = "lease", str52 = "audit_write", str53 = "audit_control", str55 = "setfcap", str58 = "mac_override", str61 = "mac_admin", str64 = "syslog", str67 = "wake_alarm", str76 = "block_suspend", str79 = "audit_read", str82 = "perfmon", str85 = "bpf"}, str = 0x7ffff7bccb80 <captab_msgstr> "chown"} -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- Here above we can see it doesn't know capability 40 at all. The reason for this is having built the library in an environment installed with kernel-headers-4.18.0-310.el8.x86_64, which didn't have CAP_CHECKPOINT_RESTORE: -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- # rpm2cpio ../kernel-headers-4.18.0-310.el8.x86_64.rpm | cpio -icdmu 10493 blocks # grep -B 4 CAP_LAST_CAP usr/include/linux/capability.h * CAP_NET_ADMIN and CAP_BPF are required to load networking programs. */ #define CAP_BPF 39 #define CAP_LAST_CAP CAP_BPF #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- Building locally on my test system running RHEL8.6 shows the capability being present, which confirms the root cause. Please rebuild the library ASAP. Version-Release number of selected component (if applicable): libcap-ng-0.7.11-1.el8.x86_64 kernel-4.18.0-348.el8 and later How reproducible: Always, see above.