netfilter: nft_set_rbtree: handle element re-addition after deletion
authorPablo Neira Ayuso <pablo@netfilter.org>
Sat, 20 May 2017 22:37:10 +0000 (00:37 +0200)
committerPablo Neira Ayuso <pablo@netfilter.org>
Tue, 23 May 2017 20:54:14 +0000 (22:54 +0200)
commitd2df92e98a34a5619dadd29c6291113c009181e7
treed695906ddc133bee6c113f495eb1be9818ab02c3
parentf3c0eb05e258c6a48c2d1ef2fa71ffb6ff63cd18
netfilter: nft_set_rbtree: handle element re-addition after deletion

The existing code selects no next branch to be inspected when
re-inserting an inactive element into the rb-tree, looping endlessly.
This patch restricts the check for active elements to the EEXIST case
only.

Fixes: e701001e7cbe ("netfilter: nft_rbtree: allow adjacent intervals with dynamic updates")
Reported-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Tested-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nft_set_rbtree.c