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authorPablo Neira Ayuso <pablo@netfilter.org>2022-04-18 13:21:05 +0300
committerPablo Neira Ayuso <pablo@netfilter.org>2022-04-22 16:49:15 +0300
commitbabc3dc9524f0bcb5a0ec61f3c3639b11508fad6 (patch)
tree736178bb855bc63bfcc60d67df74542780f32b1e /net
parenteba1a872cb73314280d5448d934935b23e30b7ca (diff)
downloadlinux-babc3dc9524f0bcb5a0ec61f3c3639b11508fad6.tar.xz
netfilter: nft_set_rbtree: overlap detection with element re-addition after deletion
This patch fixes spurious EEXIST errors. Extend d2df92e98a34 ("netfilter: nft_set_rbtree: handle element re-addition after deletion") to deal with elements with same end flags in the same transation. Reset the overlap flag as described by 7c84d41416d8 ("netfilter: nft_set_rbtree: Detect partial overlaps on insertion"). Fixes: 7c84d41416d8 ("netfilter: nft_set_rbtree: Detect partial overlaps on insertion") Fixes: d2df92e98a34 ("netfilter: nft_set_rbtree: handle element re-addition after deletion") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nft_set_rbtree.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index d600a566da32..7325bee7d144 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -349,7 +349,11 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
*ext = &rbe->ext;
return -EEXIST;
} else {
- p = &parent->rb_left;
+ overlap = false;
+ if (nft_rbtree_interval_end(rbe))
+ p = &parent->rb_left;
+ else
+ p = &parent->rb_right;
}
}