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Bug 2136584 - ebtables among-src partially broken
Summary: ebtables among-src partially broken
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: iptables
Version: 9.1
Hardware: Unspecified
OS: Unspecified
medium
high
Target Milestone: rc
: 9.2
Assignee: Phil Sutter
QA Contact: Jiri Peska
URL:
Whiteboard:
: 2154912 (view as bug list)
Depends On:
Blocks: 2091421 2144442
TreeView+ depends on / blocked
 
Reported: 2022-10-20 17:05 UTC by Tomas Dolezal
Modified: 2023-02-28 08:23 UTC (History)
3 users (show)

Fixed In Version: iptables-1.8.8-5.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-02-28 08:19:23 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-137219 0 None None None 2022-10-20 17:12:28 UTC
Red Hat Product Errata RHBA-2023:0949 0 None None None 2023-02-28 08:19:28 UTC

Description Tomas Dolezal 2022-10-20 17:05:23 UTC 
Description of problem:
ebtables --among-src with over 3 entities or including negation fail.

Version-Release number of selected component (if applicable):
iptables-nft-1.8.8-4.el9

How reproducible:
always

Steps to Reproduce:
following commands fail (extensions/libebt_among.t)
 ebtables -A INPUT --among-src de:ad:0:be:ee:ff=10.0.0.1,c0:ff:ee:0:ba:be=192.168.1.1
 ebtables -A INPUT --among-src ! c0:ff:ee:0:ba:be=192.168.1.1,de:ad:0:be:ee:ff=10.0.0.1
 ebtables -A INPUT --among-src de:ad:0:be:ee:ff=10.0.0.1 --among-dst c0:ff:ee:0:ba:be=192.168.1.1
 ebtables -A INPUT --among-src de:ad:0:be:ee:ff=10.0.0.1 --among-dst ! c0:ff:ee:0:ba:be=192.168.1.1
 ebtables -A INPUT --among-src ! de:ad:0:be:ee:ff --among-dst c0:ff:ee:0:ba:be=192.168.1.1
 ebtables -A INPUT --among-src de:ad:0:be:ee:ff=10.0.0.1 --among-dst ! c0:ff:ee:0:ba:be=192.168.1.1
 ebtables -A INPUT --among-src c0:ff:ee:0:ba:be=192.168.1.1,de:ad:0:be:ee:ff

Actual results:
every invocation above prints:
 ebtables v1.8.8 (nf_tables):  SET_ADD failed (No such file or directory): set __set%d

Expected results:
no output
ruleset from iptables-nft-1.8.7-28.el9.x86_64
table bridge filter {
	chain INPUT {
		type filter hook input priority filter; policy accept;
		ether saddr . ip saddr { c0:ff:ee:00:ba:be . 192.168.1.1, de:ad:00:be:ee:ff . 10.0.0.1 } counter packets 0 bytes 0
		ether saddr . ip saddr != { c0:ff:ee:00:ba:be . 192.168.1.1, de:ad:00:be:ee:ff . 10.0.0.1 } counter packets 0 bytes 0
		ether saddr . ip saddr { de:ad:00:be:ee:ff . 10.0.0.1 } ether daddr . ip daddr { c0:ff:ee:00:ba:be . 192.168.1.1 } counter packets 0 bytes 0
		ether saddr . ip saddr { de:ad:00:be:ee:ff . 10.0.0.1 } ether daddr . ip daddr != { c0:ff:ee:00:ba:be . 192.168.1.1 } counter packets 0 bytes 0
		ether saddr != { de:ad:00:be:ee:ff } ether daddr . ip daddr { c0:ff:ee:00:ba:be . 192.168.1.1 } counter packets 0 bytes 0
		ether saddr . ip saddr { de:ad:00:be:ee:ff . 10.0.0.1 } ether daddr . ip daddr != { c0:ff:ee:00:ba:be . 192.168.1.1 } counter packets 0 bytes 0
		ether saddr . ip saddr { c0:ff:ee:00:ba:be . 192.168.1.1, de:ad:00:be:ee:ff . 0.0.0.0/0 } counter packets 0 bytes 0
	}
}

Additional info:
Comment 1 Phil Sutter 2022-11-30 15:08:51 UTC 
RHEL9 lacks the following two fixes:

commit 2ba74d421cd622757df7a93720afc3b5b4b3b4e0
Author: Florian Westphal <fw>
Date:   Tue Aug 2 14:52:30 2022 +0200

    nft: fix ebtables among match when mac+ip addresses are used
    
    When matching mac and ip addresses, the ip address needs to be placed
    into then 2nd 32bit register, the switch to dynamic register allocation
    instead re-uses reg1, this partially clobbers the mac address, so
    set lookup comes up empty even though it should find a match.
    
    Fixes: 7e38890c6b4fb ("nft: prepare for dynamic register allocation")
    Reported-by: Yi Chen <yiche>
    Signed-off-by: Florian Westphal <fw>


commit 32efb4ffc33ae874b3f26f3380e2184ad6ceb26f
Author: Florian Westphal <fw>
Date:   Thu Sep 22 13:33:50 2022 +0200

    nft: un-break among match with concatenation
    
    The kernel commit 88cccd908d51 ("netfilter: nf_tables: NFTA_SET_ELEM_KEY_END requires concat and interval flags")
    breaks ebtables-nft 'among' emulation, it sets NFTA_SET_ELEM_KEY_END but
    doesn't set the CONCAT flag.
    
    Update uapi header and also set CONCAT.
    
    Signed-off-by: Florian Westphal <fw>

Jiri, please approve for RHEL9.1.z
Comment 5 Phil Sutter 2022-12-20 17:11:55 UTC 
*** Bug 2154912 has been marked as a duplicate of this bug. ***
Comment 12 errata-xmlrpc 2023-02-28 08:19:23 UTC 
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 (iptables bug fix and enhancement update), 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-2023:0949
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