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From 0e284af80adefc8d8738c7191eff0ca7c6ad64a6 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Wed, 27 Apr 2022 14:46:47 +0200
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Subject: [PATCH] rule: fix element cache update in __do_add_setelems()
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2073287
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Upstream Status: nftables commit e68938f2bf89f
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commit e68938f2bf89fcc9a99e12c9b7a10c1838f2a133
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Author: Pablo Neira Ayuso <pablo@netfilter.org>
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Date: Thu Apr 30 16:30:15 2020 +0200
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rule: fix element cache update in __do_add_setelems()
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The set->init and expr arguments might actually refer to the same list
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of elements. Skip set element cache update introduced by dd44081d91ce
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("segtree: Fix add and delete of element in same batch") otherwise
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list_splice_tail_init() actually operates with the same list as
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arguments. Valgrind reports this problem as a memleak since the result
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of this operation was an empty set element list.
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Fixes: dd44081d91ce ("segtree: Fix add and delete of element in same batch")
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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---
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src/rule.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/rule.c b/src/rule.c
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index b2aa1d7..9ae6d19 100644
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--- a/src/rule.c
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+++ b/src/rule.c
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@@ -1512,7 +1512,7 @@ static int __do_add_setelems(struct netlink_ctx *ctx, struct set *set,
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return -1;
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if (!set_is_anonymous(set->flags) &&
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- set->init != NULL &&
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+ set->init != NULL && set->init != expr &&
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set->flags & NFT_SET_INTERVAL &&
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set->desc.field_count <= 1) {
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interval_map_decompose(expr);
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--
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2.34.1
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