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Following commit might add a test for this, though have to check additional dependencies on RHEL8 first:
commit e632eea21f4b3d03b629a5c1ac7e776d65785873
Author: Florian Westphal <fw>
Date: Tue Oct 19 14:07:25 2021 +0200
tests: shell: auto-removal of chain hook on netns removal
This is the nft equivalent of the syzbot report that lead to
kernel commit 68a3765c659f8
("netfilter: nf_tables: skip netdev events generated on netns removal").
Signed-off-by: Florian Westphal <fw>
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 (nftables 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-2022:7707
Resolved in 0.9.4, via commit 78bbe7f7a55be48909067e25900de27623d8fa6a ("mnl: do not use expr->identifier to fetch device name").