Bug 113558
| Summary: | kdc segfaults on startup while sorting interfaces | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Paul Jakma <paul+rhbugz> |
| Component: | krb5 | Assignee: | Nalin Dahyabhai <nalin> |
| Status: | CLOSED DUPLICATE | QA Contact: | Brian Brock <bbrock> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 1 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i586 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-02-21 19:00:46 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
*** This bug has been marked as a duplicate of 113347 *** Upstream report: http://mailman.mit.edu/pipermail/krb5-bugs/2004-January/002152.html Changed to 'CLOSED' state since 'RESOLVED' has been deprecated. |
Description of problem: The kdc binary segfaults on start up while sorting through the interfaces on the system in src/include/foreachaddr.c::foreach_localaddr(). It appears that the ifp list can sometimes contain interfaces with NULL ->ifa_addrs. However this function does not take this into account and calls functions which dereference ifa_addrs. See also bug i opened with upstream: [krbdev.mit.edu #2115]. Version-Release number of selected component (if applicable): krb5-server 1.3.1-6 How reproducible: very. Steps to Reproduce: 1. setup interfaces to be similar to: $ ip a 1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 brd 127.255.255.255 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever inet6 ff02::1/128 scope global valid_lft forever preferred_lft forever 2: usb0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether e6:91:5b:86:21:0f brd ff:ff:ff:ff:ff:ff inet6 2001:770:105:2:20df:4eff:fe29:c2a9/64 scope global valid_lft forever preferred_lft forever inet6 fe80::e491:5bff:fe86:210f/64 scope link valid_lft forever preferred_lft forever inet6 ff02::9/128 scope global valid_lft forever preferred_lft forever inet6 ff02::2/128 scope global valid_lft forever preferred_lft forever inet6 ff02::1:ff29:c2a9/128 scope global valid_lft forever preferred_lft forever inet6 ff02::1:ff86:210f/128 scope global valid_lft forever preferred_lft forever inet6 ff02::1/128 scope global valid_lft forever preferred_lft forever 3: sit0: <NOARP> mtu 1480 qdisc noop link/sit 0.0.0.0 brd 0.0.0.0 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:00:f8:10:88:00 brd ff:ff:ff:ff:ff:ff inet 192.168.0.4/24 brd 192.168.0.255 scope global eth0 inet6 2001:770:105:1:200:f8ff:fe10:8800/64 scope global dynamic valid_lft 1795sec preferred_lft 595sec inet6 fe80::200:f8ff:fe10:8800/64 scope link valid_lft forever preferred_lft forever inet6 ff02::9/128 scope global valid_lft forever preferred_lft forever inet6 ff02::2/128 scope global valid_lft forever preferred_lft forever inet6 ff02::1:ff10:8800/128 scope global valid_lft forever preferred_lft forever inet6 ff02::1/128 scope global valid_lft forever preferred_lft forever 2. run kdc 3. watch it segfault Actual results: SEGV in several places, all due to foreach_localaddr passing on NULL ifa_addr's. kdc fails to start, local network is left without authentication services. Expected results: kdc starts, doesnt crash and provides normal service. Additional info: See [krbdev.mit.edu #2115] for back traces.