| Summary: | Segfault with 'ip6 nexthdr ipv6-frag' | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Phil Sutter <psutter> |
| Component: | nftables | Assignee: | Phil Sutter <psutter> |
| Status: | CLOSED ERRATA | QA Contact: | Vaclav Danek <vdanek> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.4 | CC: | atragler, kvolny, mleitner, sukulkar, todoleza, vdanek |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | nftables-0.6-4.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-08-01 18:56:07 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-2017:2047 |
The following command crashes nft utility reproducibly: # nft add rule ip6 test ftest ip6 nexthdr ipv6-frag counter Analysis of the cause using gdb and looking at differences between version 0.6 and upstream (which works fine) shows we're missing the following commit: commit 3503738f77cdbe521da1054a37f59ac2e442b4cf Author: Florian Westphal <fw> Date: Mon Jun 6 21:52:28 2016 +0200 payload: don't update protocol context if we can't find a description Since commit 20b1131c07acd2fc ("payload: fix stacked headers protocol context tracking") we deref null pointer if we can't find a description for the desired protocol, so "ip protocol 254" crashes while testing protocols 6 or 17 (tcp, udp) works. Also add a test case for this. Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1072 Signed-off-by: Florian Westphal <fw> Acked-by: Pablo Neira Ayuso <pablo>