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Description of problem:

In certain setups, nft crashes with the following message:

BUG: Unknown expression binop
nft: mergesort.c:47: expr_msort_cmp: Assertion `0' failed.
Aborted (core dumped)

Seems to be a known bug, fixed upstream:
http://git.netfilter.org/nftables/commit/?id=3926a3369bb5ada5c0706dadcbcf938517822a35

Is it possible to pick that fix to RH 8?

Hi Denis,

(In reply to Denis Silakov from comment #0)
> Description of problem:
> 
> In certain setups, nft crashes with the following message:
> 
> BUG: Unknown expression binop
> nft: mergesort.c:47: expr_msort_cmp: Assertion `0' failed.
> Aborted (core dumped)
> 
> Seems to be a known bug, fixed upstream:
> http://git.netfilter.org/nftables/commit/
> ?id=3926a3369bb5ada5c0706dadcbcf938517822a35
> 
> Is it possible to pick that fix to RH 8?

Sure, thanks for the report and analysis! Are you OK with this being fixed in RHEL8.4 or do you need a backport into an earlier release?

Thanks, Phil

8.4 is ok.

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/RHEA-2021:1722