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Upstream commit to backport:
commit c550c81fd373e5753103d20f7902171f0fa79807
Author: Phil Sutter <phil>
Date: Fri Feb 28 20:32:13 2020 +0100
nft: cache: Fix nft_release_cache() under stress
iptables-nft-restore calls nft_action(h, NFT_COMPAT_COMMIT) for each
COMMIT line in input. When restoring a dump containing multiple large
tables, chances are nft_rebuild_cache() has to run multiple times.
If the above happens, consecutive table contents are added to __cache[1]
which nft_rebuild_cache() then frees, so next commit attempt accesses
invalid memory.
Fix this by making nft_release_cache() (called after each successful
commit) return things into pre-rebuild state again, but keeping the
fresh cache copy.
Fixes: f6ad231d698c7 ("nft: keep original cache in case of ERESTART")
Signed-off-by: Phil Sutter <phil>
Here's a scratch build including the patch from above, it fixes the segfaults we can reproduce: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=27208911
Does that help? Can you try that one?
As said, the stack traces don't look familiar, but this is also a case of memory corruption.
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/RHEA-2020:1889
Comment 54Red Hat Bugzilla
2023-09-15 00:29:56 UTC
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days