Bug 125958
| Summary: | traceroute6 segfaults when packet length is too large | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Per Steinar Iversen <persteinar.iversen> |
| Component: | iputils | Assignee: | Radek Vokál <rvokal> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Mike McLean <mikem> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 2 | CC: | bressers |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-01-31 09:14:04 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: | |||
Some experiments show that the magic limit is always 56-60 bytes less than the MTU of the network interface. Works on same iptools version, same host, kernel 2.6.8-1.521 with packet size up to 60000. I didn't manage to reproduce it here. Works fine with kernel-2.6.10 and latests iputils. Having here the core dump file from segfault would be nice. I believe this problem was really this one, bug 126021 At least the problem went away when the kernel fragmentation bug was fixed. Ok, closing this bug as currentrelease .. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040116 Description of problem: traceroute6 segfaults if the packet length is set too large: Here is a test on the local network:: # traceroute6 www.it.hio.no 1440 traceroute to www.it.hio.no (2001:700:700:1:2c0:9fff:fe35:281e) from 2001:700:700:1:202:b3ff:fe8f:6379, 30 hops max, 1440 byte packets 1 www.it.hio.no (2001:700:700:1:2c0:9fff:fe35:281e) 1.076 ms 4.147 ms 3.293 ms # traceroute6 www.it.hio.no 1441 traceroute to www.it.hio.no (2001:700:700:1:2c0:9fff:fe35:281e) from 2001:700:700:1:202:b3ff:fe8f:6379, 30 hops max, 1441 byte packets Segmentation fault # ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:02:B3:8F:63:79 inet addr:158.36.161.50 Bcast:158.36.161.255 Mask:255.255.255.0 inet6 addr: 2001:700:700:1:202:b3ff:fe8f:6379/64 Scope:Global inet6 addr: fe80::202:b3ff:fe8f:6379/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:430 errors:0 dropped:0 overruns:0 frame:0 TX packets:1385 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:103211 (100.7 Kb) TX bytes:214463 (209.4 Kb) # uname -a Linux lumi.hio.no 2.6.6-1.427 #1 Thu Jun 10 09:33:46 EDT 2004 i686 i686 i386 GNU/Linux Anything above 1440 bytes fails to work. Version-Release number of selected component (if applicable): iputils-20020927-13 How reproducible: Always Steps to Reproduce: 1. Use traceroute6 with a packet length above 1440 2. Get a segmentation fault 3. Actual Results: Segmentation fault. Expected Results: Something more clever. Additional info: