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From 3b98024d952d265d50078c5b7ad04c9c65373733 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Fri, 29 May 2020 19:33:22 +0200
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Subject: [PATCH] nft: cache: Reset genid when rebuilding cache
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This is required in order to avoid a cache rebuild loop if
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iptables-nft-restore is called with '--test' parameter and a dump
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containing more than a single table.
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If non-zero, __nft_build_cache() never updates genid and therefore the
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incorrect genid (caused by increment in nft_action()) is never
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corrected.
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This is a RHEL-only fix, upstream rewrote the whole cache logic which
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implicitly resolved this problem.
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Fixes: 200bc39965149 ("nft: cache: Fix iptables-save segfault under stress")
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Signed-off-by: Phil Sutter <psutter@redhat.com>
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---
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iptables/nft-cache.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/iptables/nft-cache.c b/iptables/nft-cache.c
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index 07265b7795e4f..bc6e7f7eaebfb 100644
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--- a/iptables/nft-cache.c
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+++ b/iptables/nft-cache.c
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@@ -629,6 +629,7 @@ void nft_rebuild_cache(struct nft_handle *h)
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if (h->cache_level)
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__nft_flush_cache(h);
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+ h->nft_genid = 0;
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h->cache_level = NFT_CL_NONE;
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__nft_build_cache(h, level, NULL, NULL, NULL);
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}
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--
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2.26.2
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